Get resolve -at mainline

p4raw-id: //depot/utfperl@4126

32 files changed, 4580 insertions, 0 deletions

diff --git a/t/pragma/warn/1global b/t/pragma/warn/1global
new file mode 100644
index 0000000000..836b7f513f
--- /dev/null
+++ b/t/pragma/warn/1global
@@ -0,0 +1,189 @@
+Check existing $^W functionality
+
+
+__END__
+
+# warnable code, warnings disabled
+$a =+ 3 ;
+EXPECT
+
+########
+-w
+# warnable code, warnings enabled via command line switch
+$a =+ 3 ;
+EXPECT
+Reversed += operator at - line 3.
+Name "main::a" used only once: possible typo at - line 3.
+########
+#! perl -w
+# warnable code, warnings enabled via #! line
+$a =+ 3 ;
+EXPECT
+Reversed += operator at - line 3.
+Name "main::a" used only once: possible typo at - line 3.
+########
+
+# warnable code, warnings enabled via compile time $^W
+BEGIN { $^W = 1 }
+$a =+ 3 ;
+EXPECT
+Reversed += operator at - line 4.
+Name "main::a" used only once: possible typo at - line 4.
+########
+
+# compile-time warnable code, warnings enabled via runtime $^W
+# so no warning printed.
+$^W = 1 ;
+$a =+ 3 ;
+EXPECT
+
+########
+
+# warnable code, warnings enabled via runtime $^W
+$^W = 1 ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+
+# warnings enabled at compile time, disabled at run time
+BEGIN { $^W = 1 }
+$^W = 0 ;
+my $b ; chop $b ;
+EXPECT
+
+########
+
+# warnings disabled at compile time, enabled at run time
+BEGIN { $^W = 0 }
+$^W = 1 ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 5.
+########
+-w
+--FILE-- abcd
+my $b ; chop $b ;
+1 ;
+--FILE-- 
+require "./abcd";
+EXPECT
+Use of uninitialized value at ./abcd line 1.
+########
+
+--FILE-- abcd
+my $b ; chop $b ;
+1 ;
+--FILE-- 
+#! perl -w
+require "./abcd";
+EXPECT
+Use of uninitialized value at ./abcd line 1.
+########
+
+--FILE-- abcd
+my $b ; chop $b ;
+1 ;
+--FILE-- 
+$^W =1 ;
+require "./abcd";
+EXPECT
+Use of uninitialized value at ./abcd line 1.
+########
+
+--FILE-- abcd
+$^W = 0;
+my $b ; chop $b ;
+1 ;
+--FILE-- 
+$^W =1 ;
+require "./abcd";
+EXPECT
+
+########
+
+--FILE-- abcd
+$^W = 1;
+1 ;
+--FILE-- 
+$^W =0 ;
+require "./abcd";
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 3.
+########
+
+$^W = 1;
+eval 'my $b ; chop $b ;' ;
+print $@ ;
+EXPECT
+Use of uninitialized value at (eval 1) line 1.
+########
+
+eval '$^W = 1;' ;
+print $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+
+eval {$^W = 1;} ;
+print $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+
+{
+    local ($^W) = 1;
+}
+my $b ; chop $b ;
+EXPECT
+
+########
+
+my $a ; chop $a ;
+{
+    local ($^W) = 1;
+    my $b ; chop $b ;
+}
+my $c ; chop $c ;
+EXPECT
+Use of uninitialized value at - line 5.
+########
+-w
+-e undef
+EXPECT
+Use of uninitialized value at - line 2.
+########
+
+$^W = 1 + 2 ;
+EXPECT
+
+########
+
+$^W = $a ;
+EXPECT
+
+########
+
+sub fred {}
+$^W = fred() ;
+EXPECT
+
+########
+
+sub fred { my $b ; chop $b ;}
+{ local $^W = 0 ;
+  fred() ;
+}
+EXPECT
+
+########
+
+sub fred { my $b ; chop $b ;}
+{ local $^W = 1 ;
+  fred() ;
+}
+EXPECT
+Use of uninitialized value at - line 2.
diff --git a/t/pragma/warn/2use b/t/pragma/warn/2use
new file mode 100644
index 0000000000..4ec4da0a77
--- /dev/null
+++ b/t/pragma/warn/2use
@@ -0,0 +1,308 @@
+Check lexical warnings functionality
+
+TODO
+  check that the warning hierarchy works.
+
+__END__
+
+# check illegal category is caught
+use warnings 'blah' ;
+EXPECT
+unknown warning category 'blah' at - line 3
+BEGIN failed--compilation aborted at - line 3.
+########
+
+# Check compile time scope of pragma
+use warnings 'deprecated' ;
+{
+    no warnings ;
+    1 if $a EQ $b ;
+}
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+########
+
+# Check compile time scope of pragma
+no warnings;
+{
+    use warnings 'deprecated' ;
+    1 if $a EQ $b ;
+}
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 6.
+########
+
+# Check runtime scope of pragma
+use warnings 'uninitialized' ;
+{
+    no warnings ;
+    my $b ; chop $b ;
+}
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check runtime scope of pragma
+no warnings ;
+{
+    use warnings 'uninitialized' ;
+    my $b ; chop $b ;
+}
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check runtime scope of pragma
+no warnings ;
+{
+    use warnings 'uninitialized' ;
+    $a = sub { my $b ; chop $b ; }
+}
+&$a ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 3.
+########
+
+--FILE-- abc
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings 'deprecated' ;
+require "./abc";
+EXPECT
+
+########
+
+--FILE-- abc
+use warnings 'deprecated' ;
+1;
+--FILE-- 
+require "./abc";
+1 if $a EQ $b ;
+EXPECT
+
+########
+
+--FILE-- abc
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings 'uninitialized' ;
+require "./abc";
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at ./abc line 2.
+Use of uninitialized value at - line 3.
+########
+
+--FILE-- abc.pm
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings 'uninitialized' ;
+use abc;
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at abc.pm line 2.
+Use of uninitialized value at - line 3.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    my $b ; chop $b ;
+}; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    use warnings 'uninitialized' ;
+    my $b ; chop $b ;
+}; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check scope of pragma with eval
+use warnings 'uninitialized' ;
+eval {
+    my $b ; chop $b ;
+}; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 5.
+Use of uninitialized value at - line 7.
+########
+
+# Check scope of pragma with eval
+use warnings 'uninitialized' ;
+eval {
+    no warnings ;
+    my $b ; chop $b ;
+}; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    1 if $a EQ $b ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+EXPECT
+
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    use warnings 'deprecated' ;
+    1 if $a EQ $b ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 6.
+########
+
+# Check scope of pragma with eval
+use warnings 'deprecated' ;
+eval {
+    1 if $a EQ $b ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 5.
+Use of EQ is deprecated at - line 7.
+########
+
+# Check scope of pragma with eval
+use warnings 'deprecated' ;
+eval {
+    no warnings ;
+    1 if $a EQ $b ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval '
+    my $b ; chop $b ;
+'; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval q[ 
+    use warnings 'uninitialized' ;
+    my $b ; chop $b ;
+]; print STDERR $@;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at (eval 1) line 3.
+########
+
+# Check scope of pragma with eval
+use warnings 'uninitialized' ;
+eval '
+    my $b ; chop $b ;
+'; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at (eval 1) line 2.
+Use of uninitialized value at - line 7.
+########
+
+# Check scope of pragma with eval
+use warnings 'uninitialized' ;
+eval '
+    no warnings ;
+    my $b ; chop $b ;
+'; print STDERR $@ ;
+my $b ; chop $b ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval '
+    1 if $a EQ $b ;
+'; print STDERR $@ ;
+1 if $a EQ $b ;
+EXPECT
+
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval q[ 
+    use warnings 'deprecated' ;
+    1 if $a EQ $b ;
+]; print STDERR $@;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at (eval 1) line 3.
+########
+
+# Check scope of pragma with eval
+use warnings 'deprecated' ;
+eval '
+    1 if $a EQ $b ;
+'; print STDERR $@;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 7.
+Use of EQ is deprecated at (eval 1) line 2.
+########
+
+# Check scope of pragma with eval
+use warnings 'deprecated' ;
+eval '
+    no warnings ;
+    1 if $a EQ $b ;
+'; print STDERR $@;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+########
+
+# Check the additive nature of the pragma
+1 if $a EQ $b ;
+my $a ; chop $a ;
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+my $b ; chop $b ;
+use warnings 'uninitialized' ;
+my $c ; chop $c ;
+no warnings 'deprecated' ;
+1 if $a EQ $b ;
+EXPECT
+Use of EQ is deprecated at - line 6.
+Use of uninitialized value at - line 9.
+Use of uninitialized value at - line 11.
+Use of uninitialized value at - line 11.
diff --git a/t/pragma/warn/3both b/t/pragma/warn/3both
new file mode 100644
index 0000000000..592724ad73
--- /dev/null
+++ b/t/pragma/warn/3both
@@ -0,0 +1,197 @@
+Check interaction of $^W and lexical
+
+__END__
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    use warnings ;
+    my $b ; 
+    chop $b ;
+}
+{ local $^W = 0 ;
+  fred() ;
+}
+
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    use warnings ;
+    my $b ; 
+    chop $b ;
+}
+{ $^W = 0 ;
+  fred() ;
+}
+
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    no warnings ;
+    my $b ; 
+    chop $b ;
+}
+{ local $^W = 1 ;
+  fred() ;
+}
+
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    no warnings ;
+    my $b ; 
+    chop $b ;
+}
+{ $^W = 1 ;
+  fred() ;
+}
+
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+use warnings ;
+$^W = 1 ;
+my $b ; 
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+$^W = 1 ;
+use warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+$^W = 1 ;
+no warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+no warnings ;
+$^W = 1 ;
+my $b ; 
+chop $b ;
+EXPECT
+
+########
+-w
+# Check interaction of $^W and use warnings
+no warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+
+########
+-w
+# Check interaction of $^W and use warnings
+use warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 5.
+########
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    use warnings ;
+    my $b ; 
+    chop $b ;
+}
+BEGIN {  $^W = 0 }
+fred() ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+sub fred { 
+    no warnings ;
+    my $b ; 
+    chop $b ;
+}
+BEGIN {  $^W = 1 }
+fred() ;
+
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+use warnings ;
+BEGIN {  $^W = 1 }
+my $b ; 
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+BEGIN {  $^W = 1 }
+use warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+# Check interaction of $^W and use warnings
+BEGIN {  $^W = 1 }
+no warnings ;
+my $b ; 
+chop $b ;
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+no warnings ;
+BEGIN {  $^W = 1 }
+my $b ; 
+chop $b ;
+EXPECT
+
+########
+
+# Check interaction of $^W and use warnings
+BEGIN {  $^W = 1 }
+{
+    no warnings ;
+    my $b ; 
+    chop $b ;
+}
+my $b ;
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 10.
+########
+
+# Check interaction of $^W and use warnings
+BEGIN {  $^W = 0 }
+{
+    use warnings ;
+    my $b ; 
+    chop $b ;
+}
+my $b ;
+chop $b ;
+EXPECT
+Use of uninitialized value at - line 7.
diff --git a/t/pragma/warn/4lint b/t/pragma/warn/4lint
new file mode 100644
index 0000000000..6a08409bb2
--- /dev/null
+++ b/t/pragma/warn/4lint
@@ -0,0 +1,112 @@
+Check lint
+
+__END__
+-W
+# lint: check compile time $^W is zapped
+BEGIN { $^W = 0 ;}
+$a = $b = 1 ;
+$a = 1 if $a EQ $b ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+Use of EQ is deprecated at - line 5.
+print on closed filehandle main::STDIN at - line 6.
+########
+-W
+# lint: check runtime $^W is zapped
+$^W = 0 ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+print on closed filehandle main::STDIN at - line 4.
+########
+-W
+# lint: check runtime $^W is zapped
+{
+  $^W = 0 ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+print on closed filehandle main::STDIN at - line 5.
+########
+-W
+# lint: check "no warnings" is zapped
+no warnings ;
+$a = $b = 1 ;
+$a = 1 if $a EQ $b ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+Use of EQ is deprecated at - line 5.
+print on closed filehandle main::STDIN at - line 6.
+########
+-W
+# lint: check "no warnings" is zapped
+{
+  no warnings ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+print on closed filehandle main::STDIN at - line 5.
+########
+-Ww
+# lint: check combination of -w and -W
+{
+  $^W = 0 ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+print on closed filehandle main::STDIN at - line 5.
+########
+-W
+--FILE-- abc.pm
+no warnings 'deprecated' ;
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+no warnings 'uninitialized' ;
+use abc;
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at abc.pm line 3.
+Use of uninitialized value at - line 3.
+########
+-W
+--FILE-- abc
+no warnings 'deprecated' ;
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+no warnings 'uninitialized' ;
+require "./abc";
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at ./abc line 3.
+Use of uninitialized value at - line 3.
+########
+-W
+--FILE-- abc.pm
+BEGIN {$^W = 0}
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+$^W = 0 ;
+use abc;
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at abc.pm line 3.
+Use of uninitialized value at - line 3.
+########
+-W
+--FILE-- abc
+BEGIN {$^W = 0}
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+$^W = 0 ;
+require "./abc";
+my $a ; chop $a ;
+EXPECT
+Use of EQ is deprecated at ./abc line 3.
+Use of uninitialized value at - line 3.
diff --git a/t/pragma/warn/5nolint b/t/pragma/warn/5nolint
new file mode 100644
index 0000000000..994190a855
--- /dev/null
+++ b/t/pragma/warn/5nolint
@@ -0,0 +1,96 @@
+Check anti-lint
+
+__END__
+-X
+# nolint: check compile time $^W is zapped
+BEGIN { $^W = 1 ;}
+$a = $b = 1 ;
+$a = 1 if $a EQ $b ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+########
+-X
+# nolint: check runtime $^W is zapped
+$^W = 1 ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+########
+-X
+# nolint: check runtime $^W is zapped
+{
+  $^W = 1 ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+########
+-X
+# nolint: check "no warnings" is zapped
+use warnings ;
+$a = $b = 1 ;
+$a = 1 if $a EQ $b ;
+close STDIN ; print STDIN "abc" ;
+EXPECT
+########
+-X
+# nolint: check "no warnings" is zapped
+{
+  use warnings ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+########
+-Xw
+# nolint: check combination of -w and -X
+{
+  $^W = 1 ;
+  close STDIN ; print STDIN "abc" ;
+}
+EXPECT
+########
+-X
+--FILE-- abc.pm
+use warnings 'deprecated' ;
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings 'uninitialized' ;
+use abc;
+my $a ; chop $a ;
+EXPECT
+########
+-X
+--FILE-- abc
+use warnings 'deprecated' ;
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings 'uninitialized' ;
+require "./abc";
+my $a ; chop $a ;
+EXPECT
+########
+-X
+--FILE-- abc.pm
+BEGIN {$^W = 1}
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+$^W = 1 ;
+use abc;
+my $a ; chop $a ;
+EXPECT
+########
+-X
+--FILE-- abc
+BEGIN {$^W = 1}
+my ($a, $b) = (0,0);
+1 if $a EQ $b ;
+1;
+--FILE-- 
+$^W = 1 ;
+require "./abc";
+my $a ; chop $a ;
+EXPECT
diff --git a/t/pragma/warn/6default b/t/pragma/warn/6default
new file mode 100644
index 0000000000..dd3d1825f4
--- /dev/null
+++ b/t/pragma/warn/6default
@@ -0,0 +1,53 @@
+Check default warnings
+
+__END__
+# default warnings should be displayed if you don't add anything
+# optional shouldn't
+my $a = oct "7777777777777777777777777777777777779" ;
+EXPECT
+Integer overflow in octal number at - line 3.
+########
+# no warnings should be displayed 
+no warnings ;
+my $a = oct "7777777777777777777777777777777777778" ;
+EXPECT
+########
+# all warnings should be displayed 
+use warnings ;
+my $a = oct "7777777777777777777777777777777777778" ;
+EXPECT
+Integer overflow in octal number at - line 3.
+Illegal octal digit '8' ignored at - line 3.
+Octal number > 037777777777 non-portable at - line 3.
+########
+# check scope
+use warnings ;
+my $a = oct "7777777777777777777777777777777777778" ;
+{
+    no warnings ;
+    my $a = oct "7777777777777777777777777777777777778" ;
+}    
+my $c = oct "7777777777777777777777777777777777778" ;
+EXPECT
+Integer overflow in octal number at - line 3.
+Illegal octal digit '8' ignored at - line 3.
+Octal number > 037777777777 non-portable at - line 3.
+Integer overflow in octal number at - line 8.
+Illegal octal digit '8' ignored at - line 8.
+Octal number > 037777777777 non-portable at - line 8.
+########
+# all warnings should be displayed 
+use warnings ;
+my $a = oct "0xfffffffffffffffffg" ;
+EXPECT
+Integer overflow in hexadecimal number at - line 3.
+Illegal hexadecimal digit 'g' ignored at - line 3.
+Hexadecimal number > 0xffffffff non-portable at - line 3.
+########
+# all warnings should be displayed 
+use warnings ;
+my $a = oct "0b111111111111111111111111111111111111111111111111111111111111111112";
+EXPECT
+Integer overflow in binary number at - line 3.
+Illegal binary digit '2' ignored at - line 3.
+Binary number > 0b11111111111111111111111111111111 non-portable at - line 3.
diff --git a/t/pragma/warn/7fatal b/t/pragma/warn/7fatal
new file mode 100644
index 0000000000..fe94511f3e
--- /dev/null
+++ b/t/pragma/warn/7fatal
@@ -0,0 +1,242 @@
+Check FATAL functionality
+
+__END__
+
+# Check compile time warning
+use warnings FATAL => 'deprecated' ;
+{
+    no warnings ;
+    1 if $a EQ $b ;
+}
+1 if $a EQ $b ; 
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+########
+
+# Check runtime scope of pragma
+use warnings FATAL => 'uninitialized' ;
+{
+    no warnings ;
+    my $b ; chop $b ;
+}
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check runtime scope of pragma
+no warnings ;
+{
+    use warnings FATAL => 'uninitialized' ;
+    $a = sub { my $b ; chop $b ; }
+}
+&$a ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of uninitialized value at - line 6.
+########
+
+--FILE-- abc
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings FATAL => 'deprecated' ;
+require "./abc";
+EXPECT
+
+########
+
+--FILE-- abc
+use warnings FATAL => 'deprecated' ;
+1;
+--FILE-- 
+require "./abc";
+1 if $a EQ $b ;
+EXPECT
+
+########
+
+--FILE-- abc
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings FATAL => 'uninitialized' ;
+require "./abc";
+my $a ; chop $a ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at ./abc line 2.
+Use of uninitialized value at - line 3.
+########
+
+--FILE-- abc.pm
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+1;
+--FILE-- 
+use warnings FATAL => 'uninitialized' ;
+use abc;
+my $a ; chop $a ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at abc.pm line 2.
+Use of uninitialized value at - line 3.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    use warnings FATAL => 'uninitialized' ;
+    my $b ; chop $b ;
+}; print STDERR "-- $@" ;
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of uninitialized value at - line 6.
+The End.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'uninitialized' ;
+eval {
+    my $b ; chop $b ;
+}; print STDERR "-- $@" ;
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of uninitialized value at - line 5.
+Use of uninitialized value at - line 7.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'uninitialized' ;
+eval {
+    no warnings ;
+    my $b ; chop $b ;
+}; print STDERR $@ ;
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    use warnings FATAL => 'deprecated' ;
+    1 if $a EQ $b ;
+}; print STDERR "-- $@" ;
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 6.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'deprecated' ;
+eval {
+    1 if $a EQ $b ;
+}; print STDERR "-- $@" ;
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 5.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'deprecated' ;
+eval {
+    no warnings ;
+    1 if $a EQ $b ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval {
+    use warnings FATAL => 'deprecated' ;
+}; print STDERR $@ ;
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+The End.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval q[ 
+    use warnings FATAL => 'uninitialized' ;
+    my $b ; chop $b ;
+]; print STDERR "-- $@";
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of uninitialized value at (eval 1) line 3.
+The End.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'uninitialized' ;
+eval '
+    my $b ; chop $b ;
+'; print STDERR "-- $@" ;
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of uninitialized value at (eval 1) line 2.
+Use of uninitialized value at - line 7.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'uninitialized' ;
+eval '
+    no warnings ;
+    my $b ; chop $b ;
+'; print STDERR $@ ;
+my $b ; chop $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of uninitialized value at - line 8.
+########
+
+# Check scope of pragma with eval
+no warnings ;
+eval q[ 
+    use warnings FATAL => 'deprecated' ;
+    1 if $a EQ $b ;
+]; print STDERR "-- $@";
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of EQ is deprecated at (eval 1) line 3.
+The End.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'deprecated' ;
+eval '
+    1 if $a EQ $b ;
+'; print STDERR "-- $@";
+print STDERR "The End.\n" ;
+EXPECT
+-- Use of EQ is deprecated at (eval 1) line 2.
+The End.
+########
+
+# Check scope of pragma with eval
+use warnings FATAL => 'deprecated' ;
+eval '
+    no warnings ;
+    1 if $a EQ $b ;
+'; print STDERR "-- $@";
+1 if $a EQ $b ;
+print STDERR "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 8.
diff --git a/t/pragma/warn/8signal b/t/pragma/warn/8signal
new file mode 100644
index 0000000000..0be2d13cc0
--- /dev/null
+++ b/t/pragma/warn/8signal
@@ -0,0 +1,18 @@
+Check interaction of __WARN__, __DIE__ & lexical Warnings
+
+TODO
+
+__END__
+# 8signal
+BEGIN { $SIG{__WARN__} = sub { print "WARN -- @_" } }
+BEGIN { $SIG{__DIE__}  = sub { print "DIE -- @_" } }
+1 if 1 EQ 2 ;
+use warnings qw(deprecated) ;
+1 if 1 EQ 2 ;
+use warnings FATAL => qw(deprecated) ;
+1 if 1 EQ 2 ;
+print "The End.\n" ;
+EXPECT
+Use of EQ is deprecated at - line 8.
+WARN -- Use of EQ is deprecated at - line 6.
+DIE -- Use of EQ is deprecated at - line 8.
diff --git a/t/pragma/warn/av b/t/pragma/warn/av
new file mode 100644
index 0000000000..79bd3b7600
--- /dev/null
+++ b/t/pragma/warn/av
@@ -0,0 +1,9 @@
+  av.c	
+
+  Mandatory Warnings ALL TODO
+  ------------------
+  av_reify called on tied array		[av_reify]
+
+  Attempt to clear deleted array	[av_clear]
+  
+__END__
diff --git a/t/pragma/warn/doio b/t/pragma/warn/doio
new file mode 100644
index 0000000000..5101bdef80
--- /dev/null
+++ b/t/pragma/warn/doio
@@ -0,0 +1,191 @@
+  doio.c	
+
+  Can't do bidirectional pipe		[Perl_do_open9]
+    open(F, "| true |");
+
+  Missing command in piped open		[Perl_do_open9]
+    open(F, "| ");
+
+  Missing command in piped open		[Perl_do_open9]
+    open(F, " |");
+
+  warn(warn_nl, "open");		[Perl_do_open9]
+    open(F, "true\ncd")
+
+  Close on unopened file <%s>		[Perl_do_close] <<TODO
+    $a = "fred";close("$a")
+
+  tell() on unopened file		[Perl_do_tell]
+    $a = "fred";$a = tell($a)
+
+  seek() on unopened file		[Perl_do_seek]
+    $a = "fred";$a = seek($a,1,1)
+
+  sysseek() on unopened file		[Perl_do_sysseek]
+    $a = "fred";$a = seek($a,1,1)
+
+  warn(warn_uninit);			[Perl_do_print]
+    print $a ;
+
+  Stat on unopened file <%s> 		[Perl_my_stat]
+    close STDIN ; -x STDIN ;
+
+  warn(warn_nl, "stat");		[Perl_my_stat]
+    stat "ab\ncd"
+
+  warn(warn_nl, "lstat");		[Perl_my_lstat]
+    lstat "ab\ncd"
+
+  Can't exec \"%s\": %s 		[Perl_do_aexec5]
+
+  Can't exec \"%s\": %s 		[Perl_do_exec3]
+
+  Filehandle %s opened only for output	[Perl_do_eof]
+	my $a = eof STDOUT
+
+  Mandatory Warnings ALL TODO
+  ------------------
+  Can't do inplace edit: %s is not a regular file	[Perl_nextargv]
+     edit a directory
+
+  Can't do inplace edit: %s would not be unique		[Perl_nextargv]
+  Can't rename %s to %s: %s, skipping file		[Perl_nextargv]
+  Can't rename %s to %s: %s, skipping file		[Perl_nextargv]
+  Can't remove %s: %s, skipping file			[Perl_nextargv]
+  Can't do inplace edit on %s: %s			[Perl_nextargv]
+  
+
+__END__
+# doio.c [Perl_do_open9]
+use warnings 'io' ;
+open(F, '|'.($^O eq 'VMS' ? 'mcr ':'')."$^X -e 1|");
+close(F);
+no warnings 'io' ;
+open(G, '|'.($^O eq 'VMS' ? 'mcr ':'')."$^X -e 1|");
+close(G);
+EXPECT
+Can't do bidirectional pipe at - line 3.
+########
+# doio.c [Perl_do_open9]
+use warnings 'io' ;
+open(F, "|      ");
+no warnings 'io' ;
+open(G, "|      ");
+EXPECT
+Missing command in piped open at - line 3.
+########
+# doio.c [Perl_do_open9]
+use warnings 'io' ;
+open(F, "      |");
+no warnings 'io' ;
+open(G, "      |");
+EXPECT
+Missing command in piped open at - line 3.
+########
+# doio.c [Perl_do_open9]
+use warnings 'io' ;
+open(F, "<true\ncd");
+no warnings 'io' ;
+open(G, "<true\ncd");
+EXPECT
+Unsuccessful open on filename containing newline at - line 3.
+########
+# doio.c [Perl_do_close] <<TODO
+use warnings 'unopened' ;
+close "fred" ;
+no warnings 'unopened' ;
+close "joe" ;
+EXPECT
+Close on unopened file <fred> at - line 3.
+########
+# doio.c [Perl_do_tell Perl_do_seek Perl_do_sysseek Perl_my_stat]
+use warnings 'io' ;
+close STDIN ;
+tell(STDIN);
+$a = seek(STDIN,1,1);
+$a = sysseek(STDIN,1,1);
+-x STDIN ;
+no warnings 'io' ;
+close STDIN ;
+tell(STDIN);
+$a = seek(STDIN,1,1);
+$a = sysseek(STDIN,1,1);
+-x STDIN ;
+EXPECT
+tell() on unopened file at - line 4.
+seek() on unopened file at - line 5.
+sysseek() on unopened file at - line 6.
+Stat on unopened file <STDIN> at - line 7.
+########
+# doio.c [Perl_do_print]
+use warnings 'uninitialized' ;
+print $a ;
+no warnings 'uninitialized' ;
+print $b ;
+EXPECT
+Use of uninitialized value at - line 3.
+########
+# doio.c [Perl_my_stat Perl_my_lstat]
+use warnings 'io' ;
+stat "ab\ncd";
+lstat "ab\ncd";
+no warnings 'io' ;
+stat "ab\ncd";
+lstat "ab\ncd";
+EXPECT
+Unsuccessful stat on filename containing newline at - line 3.
+Unsuccessful stat on filename containing newline at - line 4.
+########
+# doio.c [Perl_do_aexec5]
+use warnings 'io' ;
+exec "lskdjfalksdjfdjfkls","" ;
+no warnings 'io' ;
+exec "lskdjfalksdjfdjfkls","" ;
+EXPECT
+OPTION regex
+Can't exec "lskdjfalksdjfdjfkls": .+
+########
+# doio.c [Perl_do_exec3]
+use warnings 'io' ;
+exec "lskdjfalksdjfdjfkls", "abc" ;
+no warnings 'io' ;
+exec "lskdjfalksdjfdjfkls", "abc" ;
+EXPECT
+OPTION regex
+Can't exec "lskdjfalksdjfdjfkls(:? abc)?": .+
+########
+# doio.c [Perl_nextargv]
+$^W = 0 ;
+my $filename = "./temp" ;
+mkdir $filename, 0777 
+  or die "Cannot create directory $filename: $!\n" ;
+{
+    local (@ARGV) = ($filename) ;
+    local ($^I) = "" ;
+    my $x = <> ;
+}
+{
+    no warnings 'inplace' ;
+    local (@ARGV) = ($filename) ;
+    local ($^I) = "" ;
+    my $x = <> ;
+}
+{
+    use warnings 'inplace' ;
+    local (@ARGV) = ($filename) ;
+    local ($^I) = "" ;
+    my $x = <> ;
+}
+rmdir $filename ;
+EXPECT
+Can't do inplace edit: ./temp is not a regular file at - line 9.
+Can't do inplace edit: ./temp is not a regular file at - line 21.
+
+########
+# doio.c [Perl_do_eof]
+use warnings 'io' ;
+my $a = eof STDOUT ;
+no warnings 'io' ;
+$a = eof STDOUT ;
+EXPECT
+Filehandle main::STDOUT opened only for output at - line 3.
diff --git a/t/pragma/warn/doop b/t/pragma/warn/doop
new file mode 100644
index 0000000000..961d157502
--- /dev/null
+++ b/t/pragma/warn/doop
@@ -0,0 +1,25 @@
+  doop.c	AOK
+
+  Malformed UTF-8 character
+
+
+__END__
+# doop.c
+use utf8 ;
+$_ = "\x80  \xff" ;
+chop ;
+EXPECT
+Malformed UTF-8 character at - line 4.
+########
+# doop.c
+use warnings 'utf8'  ;
+use utf8 ;
+$_ = "\x80  \xff" ;
+chop ;
+no warnings 'utf8'  ;
+$_ = "\x80  \xff" ;
+chop ;
+EXPECT
+\x80 will produce malformed UTF-8 character; use \x{80} for that at - line 4.
+\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 4.
+Malformed UTF-8 character at - line 5.
diff --git a/t/pragma/warn/gv b/t/pragma/warn/gv
new file mode 100644
index 0000000000..5ed4eca018
--- /dev/null
+++ b/t/pragma/warn/gv
@@ -0,0 +1,54 @@
+  gv.c AOK
+
+     Can't locate package %s for @%s::ISA
+	@ISA = qw(Fred); joe()
+
+     Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated
+	sub Other::AUTOLOAD { 1 } sub Other::fred {}
+	@ISA = qw(Other) ;
+	fred() ;
+
+     Use of $# is deprecated
+     Use of $* is deprecated
+
+	$a = ${"#"} ;
+ 	$a = ${"*"} ;
+
+  Mandatory Warnings ALL TODO
+  ------------------
+
+    Had to create %s unexpectedly		[gv_fetchpv]
+    Attempt to free unreferenced glob pointers	[gp_free]
+    
+__END__
+# gv.c
+use warnings 'misc' ;
+@ISA = qw(Fred); joe()
+EXPECT
+Can't locate package Fred for @main::ISA at - line 3.
+Undefined subroutine &main::joe called at - line 3.
+########
+# gv.c
+no warnings 'misc' ;
+@ISA = qw(Fred); joe()
+EXPECT
+Undefined subroutine &main::joe called at - line 3.
+########
+# gv.c
+sub Other::AUTOLOAD { 1 } sub Other::fred {}
+@ISA = qw(Other) ;
+use warnings 'deprecated' ;
+fred() ;
+EXPECT
+Use of inherited AUTOLOAD for non-method main::fred() is deprecated at - line 5.
+########
+# gv.c
+use warnings 'deprecated' ;
+$a = ${"#"};
+$a = ${"*"};
+no warnings 'deprecated' ;
+$a = ${"#"};
+$a = ${"*"};
+EXPECT
+Use of $# is deprecated at - line 3.
+Use of $* is deprecated at - line 4.
diff --git a/t/pragma/warn/hv b/t/pragma/warn/hv
new file mode 100644
index 0000000000..c9eec028f1
--- /dev/null
+++ b/t/pragma/warn/hv
@@ -0,0 +1,8 @@
+  hv.c 
+
+
+  Mandatory Warnings ALL TODO
+  ------------------
+    Attempt to free non-existent shared string	[unsharepvn]
+
+__END__
diff --git a/t/pragma/warn/malloc b/t/pragma/warn/malloc
new file mode 100644
index 0000000000..2f8b096a51
--- /dev/null
+++ b/t/pragma/warn/malloc
@@ -0,0 +1,9 @@
+  malloc.c 
+
+
+  Mandatory Warnings ALL TODO
+  ------------------
+    %s free() ignored		[Perl_mfree]
+    %s", "Bad free() ignored	[Perl_mfree]
+
+__END__
diff --git a/t/pragma/warn/mg b/t/pragma/warn/mg
new file mode 100644
index 0000000000..a8f9dbc338
--- /dev/null
+++ b/t/pragma/warn/mg
@@ -0,0 +1,44 @@
+  mg.c	AOK
+
+  No such signal: SIG%s
+    $SIG{FRED} = sub {}
+
+  SIG%s handler \"%s\" not defined.
+    $SIG{"INT"} = "ok3"; kill "INT",$$;
+
+  Mandatory Warnings TODO
+  ------------------
+  Can't break at that line	[magic_setdbline]
+
+__END__
+# mg.c
+use warnings 'signal' ;
+$SIG{FRED} = sub {};
+EXPECT
+No such signal: SIGFRED at - line 3.
+########
+# mg.c
+no warnings 'signal' ;
+$SIG{FRED} = sub {};
+EXPECT
+
+########
+# mg.c
+use warnings 'signal' ;
+if ($^O eq 'MSWin32' || $^O eq 'VMS') {
+    print "SKIPPED\n# $^O, can't kill() to raise()\n"; exit;
+}
+$|=1;
+$SIG{"INT"} = "fred"; kill "INT",$$;
+EXPECT
+SIGINT handler "fred" not defined.
+########
+# mg.c
+no warnings 'signal' ;
+if ($^O eq 'MSWin32' || $^O eq 'VMS') {
+    print "SKIPPED\n# win32, can't kill() to raise()\n"; exit;
+}
+$|=1;
+$SIG{"INT"} = "fred"; kill "INT",$$;
+EXPECT
+
diff --git a/t/pragma/warn/op b/t/pragma/warn/op
new file mode 100644
index 0000000000..e50420a8f6
--- /dev/null
+++ b/t/pragma/warn/op
@@ -0,0 +1,810 @@
+  op.c		AOK
+
+     "my" variable %s masks earlier declaration in same scope
+	my $x;
+	my $x ;
+
+     Variable "%s" may be unavailable 
+	sub x {
+      	    my $x;
+      	    sub y {
+         	$x
+      	    }
+   	}
+
+     Variable "%s" will not stay shared 
+	sub x {
+      	    my $x;
+      	    sub y {
+         	sub { $x }
+      	    }
+   	}
+
+     Found = in conditional, should be ==
+	1 if $a = 1 ;
+
+     Use of implicit split to @_ is deprecated
+	split ;
+
+     Use of implicit split to @_ is deprecated
+	$a = split ;
+
+     Useless use of time in void context
+     Useless use of a variable in void context
+     Useless use of a constant in void context
+	time ;
+	$a ;
+	"abc"
+
+     Applying %s to %s will act on scalar(%s)
+	my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
+	@a =~ /abc/ ;
+	@a =~ s/a/b/ ;
+	@a =~ tr/a/b/ ;
+	@$b =~ /abc/ ;
+	@$b =~ s/a/b/ ;
+	@$b =~ tr/a/b/ ;
+	%a =~ /abc/ ;
+	%a =~ s/a/b/ ;
+	%a =~ tr/a/b/ ;
+	%$c =~ /abc/ ;
+	%$c =~ s/a/b/ ;
+	%$c =~ tr/a/b/ ;
+
+
+     Parentheses missing around "my" list at -e line 1.
+       my $a, $b = (1,2);
+ 
+     Parentheses missing around "local" list at -e line 1.
+       local $a, $b = (1,2);
+ 
+     Probable precedence problem on logical or at -e line 1.
+       use warnings 'syntax'; my $x = print(ABC || 1);
+ 
+     Value of %s may be \"0\"; use \"defined\" 
+	$x = 1 if $x = <FH> ;
+	$x = 1 while $x = <FH> ;
+
+     Subroutine fred redefined at -e line 1.
+       sub fred{1;} sub fred{1;}
+ 
+     Constant subroutine %s redefined 
+        sub fred() {1;} sub fred() {1;}
+ 
+     Format FRED redefined at /tmp/x line 5.
+       format FRED =
+       .
+       format FRED =
+       .
+ 
+     Array @%s missing the @ in argument %d of %s() 
+	push fred ;
+ 
+     Hash %%%s missing the %% in argument %d of %s() 
+	keys joe ;
+ 
+     Statement unlikely to be reached
+     (Maybe you meant system() when you said exec()?
+ 	exec "true" ; my $a
+
+     defined(@array) is deprecated
+     (Maybe you should just omit the defined()?)
+	my @a ; defined @a ;
+	defined (@a = (1,2,3)) ;
+
+     defined(%hash) is deprecated
+     (Maybe you should just omit the defined()?)
+	my %h ; defined %h ;
+    
+     /---/ should probably be written as "---"
+        join(/---/, @foo);
+
+    %s() called too early to check prototype		[Perl_peep]
+        fred() ; sub fred ($$) {}
+
+
+    Mandatory Warnings 
+    ------------------
+    Prototype mismatch:		[cv_ckproto]
+        sub fred() ;
+        sub fred($) {}
+
+    %s never introduced		[pad_leavemy]	TODO
+    Runaway prototype		[newSUB]	TODO
+    oops: oopsAV		[oopsAV]	TODO
+    oops: oopsHV		[oopsHV]	TODO
+    
+
+__END__
+# op.c
+use warnings 'unsafe' ;
+my $x ;
+my $x ;
+no warnings 'unsafe' ;
+my $x ;
+EXPECT
+"my" variable $x masks earlier declaration in same scope at - line 4.
+########
+# op.c
+use warnings 'unsafe' ;
+sub x {
+      my $x;
+      sub y {
+         $x
+      }
+   }
+EXPECT
+Variable "$x" will not stay shared at - line 7.
+########
+# op.c
+no warnings 'unsafe' ;
+sub x {
+      my $x;
+      sub y {
+         $x
+      }
+   }
+EXPECT
+
+########
+# op.c
+use warnings 'unsafe' ;
+sub x {
+      my $x;
+      sub y {
+         sub { $x }
+      }
+   }
+EXPECT
+Variable "$x" may be unavailable at - line 6.
+########
+# op.c
+no warnings 'unsafe' ;
+sub x {
+      my $x;
+      sub y {
+         sub { $x }
+      }
+   }
+EXPECT
+
+########
+# op.c
+use warnings 'syntax' ;
+1 if $a = 1 ;
+no warnings 'syntax' ;
+1 if $a = 1 ;
+EXPECT
+Found = in conditional, should be == at - line 3.
+########
+# op.c
+use warnings 'deprecated' ;
+split ;
+no warnings 'deprecated' ;
+split ;
+EXPECT
+Use of implicit split to @_ is deprecated at - line 3.
+########
+# op.c
+use warnings 'deprecated' ;
+$a = split ;
+no warnings 'deprecated' ;
+$a = split ;
+EXPECT
+Use of implicit split to @_ is deprecated at - line 3.
+########
+# op.c
+use warnings 'void' ; close STDIN ;
+1 x 3 ;			# OP_REPEAT
+			# OP_GVSV
+wantarray ; 		# OP_WANTARRAY
+			# OP_GV
+			# OP_PADSV
+			# OP_PADAV
+			# OP_PADHV
+			# OP_PADANY
+			# OP_AV2ARYLEN
+ref ;			# OP_REF
+\@a ;			# OP_REFGEN
+\$a ;			# OP_SREFGEN
+defined $a ;		# OP_DEFINED
+hex $a ;		# OP_HEX
+oct $a ;		# OP_OCT
+length $a ;		# OP_LENGTH
+substr $a,1 ;		# OP_SUBSTR
+vec $a,1,2 ;		# OP_VEC
+index $a,1,2 ;		# OP_INDEX
+rindex $a,1,2 ;		# OP_RINDEX
+sprintf $a ;		# OP_SPRINTF
+$a[0] ;			# OP_AELEM
+			# OP_AELEMFAST
+@a[0] ;			# OP_ASLICE
+#values %a ;		# OP_VALUES
+#keys %a ;		# OP_KEYS
+$a{0} ;			# OP_HELEM
+@a{0} ;			# OP_HSLICE
+unpack "a", "a" ;	# OP_UNPACK
+pack $a,"" ;		# OP_PACK
+join "" ;		# OP_JOIN
+(@a)[0,1] ;		# OP_LSLICE
+			# OP_ANONLIST
+			# OP_ANONHASH
+sort(1,2) ;		# OP_SORT
+reverse(1,2) ;		# OP_REVERSE
+			# OP_RANGE
+			# OP_FLIP
+(1 ..2) ;		# OP_FLOP
+caller ;		# OP_CALLER
+fileno STDIN ;		# OP_FILENO
+eof STDIN ;		# OP_EOF
+tell STDIN ;		# OP_TELL
+readlink 1;		# OP_READLINK
+time ;			# OP_TIME
+localtime ;		# OP_LOCALTIME
+gmtime ;		# OP_GMTIME
+eval { getgrnam 1 };	# OP_GGRNAM
+eval { getgrgid 1 };	# OP_GGRGID
+eval { getpwnam 1 };	# OP_GPWNAM
+eval { getpwuid 1 };	# OP_GPWUID
+EXPECT
+Useless use of repeat in void context at - line 3.
+Useless use of wantarray in void context at - line 5.
+Useless use of reference-type operator in void context at - line 12.
+Useless use of reference constructor in void context at - line 13.
+Useless use of single ref constructor in void context at - line 14.
+Useless use of defined operator in void context at - line 15.
+Useless use of hex in void context at - line 16.
+Useless use of oct in void context at - line 17.
+Useless use of length in void context at - line 18.
+Useless use of substr in void context at - line 19.
+Useless use of vec in void context at - line 20.
+Useless use of index in void context at - line 21.
+Useless use of rindex in void context at - line 22.
+Useless use of sprintf in void context at - line 23.
+Useless use of array element in void context at - line 24.
+Useless use of array slice in void context at - line 26.
+Useless use of hash elem in void context at - line 29.
+Useless use of hash slice in void context at - line 30.
+Useless use of unpack in void context at - line 31.
+Useless use of pack in void context at - line 32.
+Useless use of join in void context at - line 33.
+Useless use of list slice in void context at - line 34.
+Useless use of sort in void context at - line 37.
+Useless use of reverse in void context at - line 38.
+Useless use of range (or flop) in void context at - line 41.
+Useless use of caller in void context at - line 42.
+Useless use of fileno in void context at - line 43.
+Useless use of eof in void context at - line 44.
+Useless use of tell in void context at - line 45.
+Useless use of readlink in void context at - line 46.
+Useless use of time in void context at - line 47.
+Useless use of localtime in void context at - line 48.
+Useless use of gmtime in void context at - line 49.
+Useless use of getgrnam in void context at - line 50.
+Useless use of getgrgid in void context at - line 51.
+Useless use of getpwnam in void context at - line 52.
+Useless use of getpwuid in void context at - line 53.
+########
+# op.c
+no warnings 'void' ; close STDIN ;
+1 x 3 ;			# OP_REPEAT
+			# OP_GVSV
+wantarray ; 		# OP_WANTARRAY
+			# OP_GV
+			# OP_PADSV
+			# OP_PADAV
+			# OP_PADHV
+			# OP_PADANY
+			# OP_AV2ARYLEN
+ref ;			# OP_REF
+\@a ;			# OP_REFGEN
+\$a ;			# OP_SREFGEN
+defined $a ;		# OP_DEFINED
+hex $a ;		# OP_HEX
+oct $a ;		# OP_OCT
+length $a ;		# OP_LENGTH
+substr $a,1 ;		# OP_SUBSTR
+vec $a,1,2 ;		# OP_VEC
+index $a,1,2 ;		# OP_INDEX
+rindex $a,1,2 ;		# OP_RINDEX
+sprintf $a ;		# OP_SPRINTF
+$a[0] ;			# OP_AELEM
+			# OP_AELEMFAST
+@a[0] ;			# OP_ASLICE
+#values %a ;		# OP_VALUES
+#keys %a ;		# OP_KEYS
+$a{0} ;			# OP_HELEM
+@a{0} ;			# OP_HSLICE
+unpack "a", "a" ;	# OP_UNPACK
+pack $a,"" ;		# OP_PACK
+join "" ;		# OP_JOIN
+(@a)[0,1] ;		# OP_LSLICE
+			# OP_ANONLIST
+			# OP_ANONHASH
+sort(1,2) ;		# OP_SORT
+reverse(1,2) ;		# OP_REVERSE
+			# OP_RANGE
+			# OP_FLIP
+(1 ..2) ;		# OP_FLOP
+caller ;		# OP_CALLER
+fileno STDIN ;		# OP_FILENO
+eof STDIN ;		# OP_EOF
+tell STDIN ;		# OP_TELL
+readlink 1;		# OP_READLINK
+time ;			# OP_TIME
+localtime ;		# OP_LOCALTIME
+gmtime ;		# OP_GMTIME
+eval { getgrnam 1 };	# OP_GGRNAM
+eval { getgrgid 1 };	# OP_GGRGID
+eval { getpwnam 1 };	# OP_GPWNAM
+eval { getpwuid 1 };	# OP_GPWUID
+EXPECT
+########
+# op.c
+use warnings 'void' ;
+for (@{[0]}) { "$_" }		# check warning isn't duplicated
+no warnings 'void' ;
+for (@{[0]}) { "$_" }		# check warning isn't duplicated
+EXPECT
+Useless use of string in void context at - line 3.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_telldir}) {
+        print <<EOM ;
+SKIPPED
+# telldir not present
+EOM
+        exit 
+    }
+}
+telldir 1 ;		# OP_TELLDIR
+no warnings 'void' ;
+telldir 1 ;		# OP_TELLDIR
+EXPECT
+Useless use of telldir in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_getppid}) {
+        print <<EOM ;
+SKIPPED
+# getppid not present
+EOM
+        exit 
+    }
+}
+getppid ;		# OP_GETPPID
+no warnings 'void' ;
+getppid ;		# OP_GETPPID
+EXPECT
+Useless use of getppid in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_getpgrp}) {
+        print <<EOM ;
+SKIPPED
+# getpgrp not present
+EOM
+        exit 
+    }
+}
+getpgrp ;		# OP_GETPGRP
+no warnings 'void' ;
+getpgrp ;		# OP_GETPGRP
+EXPECT
+Useless use of getpgrp in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_times}) {
+        print <<EOM ;
+SKIPPED
+# times not present
+EOM
+        exit 
+    }
+}
+times ;			# OP_TMS
+no warnings 'void' ;
+times ;			# OP_TMS
+EXPECT
+Useless use of times in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_getprior} or $^O eq 'os2') { # Locks before fixpak22
+        print <<EOM ;
+SKIPPED
+# getpriority not present
+EOM
+        exit 
+    }
+}
+getpriority 1,2;	# OP_GETPRIORITY
+no warnings 'void' ;
+getpriority 1,2;	# OP_GETPRIORITY
+EXPECT
+Useless use of getpriority in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ;
+BEGIN {
+    if ( ! $Config{d_getlogin}) {
+        print <<EOM ;
+SKIPPED
+# getlogin not present
+EOM
+        exit 
+    }
+}
+getlogin ;			# OP_GETLOGIN
+no warnings 'void' ;
+getlogin ;			# OP_GETLOGIN
+EXPECT
+Useless use of getlogin in void context at - line 13.
+########
+# op.c
+use warnings 'void' ;
+use Config ; BEGIN {
+if ( ! $Config{d_socket}) {
+    print <<EOM ;
+SKIPPED
+# getsockname not present
+# getpeername not present
+# gethostbyname not present
+# gethostbyaddr not present
+# gethostent not present
+# getnetbyname not present
+# getnetbyaddr not present
+# getnetent not present
+# getprotobyname not present
+# getprotobynumber not present
+# getprotoent not present
+# getservbyname not present
+# getservbyport not present
+# getservent not present
+EOM
+    exit 
+} }
+getsockname STDIN ;	# OP_GETSOCKNAME
+getpeername STDIN ;	# OP_GETPEERNAME
+gethostbyname 1 ;	# OP_GHBYNAME
+gethostbyaddr 1,2;	# OP_GHBYADDR
+gethostent ;		# OP_GHOSTENT
+getnetbyname 1 ;	# OP_GNBYNAME
+getnetbyaddr 1,2 ;	# OP_GNBYADDR
+getnetent ;		# OP_GNETENT
+getprotobyname 1;	# OP_GPBYNAME
+getprotobynumber 1;	# OP_GPBYNUMBER
+getprotoent ;		# OP_GPROTOENT
+getservbyname 1,2;	# OP_GSBYNAME
+getservbyport 1,2;	# OP_GSBYPORT
+getservent ;		# OP_GSERVENT
+
+no warnings 'void' ;
+getsockname STDIN ;	# OP_GETSOCKNAME
+getpeername STDIN ;	# OP_GETPEERNAME
+gethostbyname 1 ;	# OP_GHBYNAME
+gethostbyaddr 1,2;	# OP_GHBYADDR
+gethostent ;		# OP_GHOSTENT
+getnetbyname 1 ;	# OP_GNBYNAME
+getnetbyaddr 1,2 ;	# OP_GNBYADDR
+getnetent ;		# OP_GNETENT
+getprotobyname 1;	# OP_GPBYNAME
+getprotobynumber 1;	# OP_GPBYNUMBER
+getprotoent ;		# OP_GPROTOENT
+getservbyname 1,2;	# OP_GSBYNAME
+getservbyport 1,2;	# OP_GSBYPORT
+getservent ;		# OP_GSERVENT
+INIT {
+   # some functions may not be there, so we exit without running
+   exit;
+}
+EXPECT
+Useless use of getsockname in void context at - line 24.
+Useless use of getpeername in void context at - line 25.
+Useless use of gethostbyname in void context at - line 26.
+Useless use of gethostbyaddr in void context at - line 27.
+Useless use of gethostent in void context at - line 28.
+Useless use of getnetbyname in void context at - line 29.
+Useless use of getnetbyaddr in void context at - line 30.
+Useless use of getnetent in void context at - line 31.
+Useless use of getprotobyname in void context at - line 32.
+Useless use of getprotobynumber in void context at - line 33.
+Useless use of getprotoent in void context at - line 34.
+Useless use of getservbyname in void context at - line 35.
+Useless use of getservbyport in void context at - line 36.
+Useless use of getservent in void context at - line 37.
+########
+# op.c
+use warnings 'void' ;
+*a ; # OP_RV2GV
+$a ; # OP_RV2SV
+@a ; # OP_RV2AV
+%a ; # OP_RV2HV
+no warnings 'void' ;
+*a ; # OP_RV2GV
+$a ; # OP_RV2SV
+@a ; # OP_RV2AV
+%a ; # OP_RV2HV
+EXPECT
+Useless use of a variable in void context at - line 3.
+Useless use of a variable in void context at - line 4.
+Useless use of a variable in void context at - line 5.
+Useless use of a variable in void context at - line 6.
+########
+# op.c
+use warnings 'void' ;
+"abc"; # OP_CONST
+7 ; # OP_CONST
+no warnings 'void' ;
+"abc"; # OP_CONST
+7 ; # OP_CONST
+EXPECT
+Useless use of a constant in void context at - line 3.
+Useless use of a constant in void context at - line 4.
+########
+# op.c
+$ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3; # known scalar leak
+use warnings 'unsafe' ;
+my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
+@a =~ /abc/ ;
+@a =~ s/a/b/ ;
+@a =~ tr/a/b/ ;
+@$b =~ /abc/ ;
+@$b =~ s/a/b/ ;
+@$b =~ tr/a/b/ ;
+%a =~ /abc/ ;
+%a =~ s/a/b/ ;
+%a =~ tr/a/b/ ;
+%$c =~ /abc/ ;
+%$c =~ s/a/b/ ;
+%$c =~ tr/a/b/ ;
+{
+no warnings 'unsafe' ;
+my $a ; my @a = () ; my %a = () ; my $b = \@a ; my $c = \%a ;
+@a =~ /abc/ ;
+@a =~ s/a/b/ ;
+@a =~ tr/a/b/ ;
+@$b =~ /abc/ ;
+@$b =~ s/a/b/ ;
+@$b =~ tr/a/b/ ;
+%a =~ /abc/ ;
+%a =~ s/a/b/ ;
+%a =~ tr/a/b/ ;
+%$c =~ /abc/ ;
+%$c =~ s/a/b/ ;
+%$c =~ tr/a/b/ ;
+}
+EXPECT
+Applying pattern match to @array will act on scalar(@array) at - line 5.
+Applying substitution to @array will act on scalar(@array) at - line 6.
+Can't modify private array in substitution at - line 6, near "s/a/b/ ;"
+Applying character translation to @array will act on scalar(@array) at - line 7.
+Applying pattern match to @array will act on scalar(@array) at - line 8.
+Applying substitution to @array will act on scalar(@array) at - line 9.
+Applying character translation to @array will act on scalar(@array) at - line 10.
+Applying pattern match to %hash will act on scalar(%hash) at - line 11.
+Applying substitution to %hash will act on scalar(%hash) at - line 12.
+Applying character translation to %hash will act on scalar(%hash) at - line 13.
+Applying pattern match to %hash will act on scalar(%hash) at - line 14.
+Applying substitution to %hash will act on scalar(%hash) at - line 15.
+Applying character translation to %hash will act on scalar(%hash) at - line 16.
+BEGIN not safe after errors--compilation aborted at - line 18.
+########
+# op.c
+use warnings 'syntax' ;
+my $a, $b = (1,2);
+no warnings 'syntax' ;
+my $c, $d = (1,2);
+EXPECT
+Parentheses missing around "my" list at - line 3.
+########
+# op.c
+use warnings 'syntax' ;
+local $a, $b = (1,2);
+no warnings 'syntax' ;
+local $c, $d = (1,2);
+EXPECT
+Parentheses missing around "local" list at - line 3.
+########
+# op.c
+use warnings 'syntax' ;
+print (ABC || 1) ;
+no warnings 'syntax' ;
+print (ABC || 1) ;
+EXPECT
+Probable precedence problem on logical or at - line 3.
+########
+--FILE-- abc
+
+--FILE--
+# op.c
+use warnings 'unsafe' ;
+open FH, "<abc" ;
+$x = 1 if $x = <FH> ;
+no warnings 'unsafe' ;
+$x = 1 if $x = <FH> ;
+EXPECT
+Value of <HANDLE> construct can be "0"; test with defined() at - line 4.
+########
+# op.c
+use warnings 'unsafe' ;
+opendir FH, "." ;
+$x = 1 if $x = readdir FH ;
+no warnings 'unsafe' ;
+$x = 1 if $x = readdir FH ;
+closedir FH ;
+EXPECT
+Value of readdir() operator can be "0"; test with defined() at - line 4.
+########
+# op.c
+use warnings 'unsafe' ;
+$x = 1 if $x = <*> ;
+no warnings 'unsafe' ;
+$x = 1 if $x = <*> ;
+EXPECT
+Value of glob construct can be "0"; test with defined() at - line 3.
+########
+# op.c
+use warnings 'unsafe' ;
+%a = (1,2,3,4) ;
+$x = 1 if $x = each %a ;
+no warnings 'unsafe' ;
+$x = 1 if $x = each %a ;
+EXPECT
+Value of each() operator can be "0"; test with defined() at - line 4.
+########
+# op.c
+use warnings 'unsafe' ;
+$x = 1 while $x = <*> and 0 ;
+no warnings 'unsafe' ;
+$x = 1 while $x = <*> and 0 ;
+EXPECT
+Value of glob construct can be "0"; test with defined() at - line 3.
+########
+# op.c
+use warnings 'unsafe' ;
+opendir FH, "." ;
+$x = 1 while $x = readdir FH and 0 ;
+no warnings 'unsafe' ;
+$x = 1 while $x = readdir FH and 0 ;
+closedir FH ;
+EXPECT
+Value of readdir() operator can be "0"; test with defined() at - line 4.
+########
+# op.c
+use warnings 'redefine' ;
+sub fred {}
+sub fred {}
+no warnings 'redefine' ;
+sub fred {}
+EXPECT
+Subroutine fred redefined at - line 4.
+########
+# op.c
+use warnings 'redefine' ;
+sub fred () { 1 }
+sub fred () { 1 }
+no warnings 'redefine' ;
+sub fred () { 1 }
+EXPECT
+Constant subroutine fred redefined at - line 4.
+########
+# op.c
+use warnings 'redefine' ;
+format FRED =
+.
+format FRED =
+.
+no warnings 'redefine' ;
+format FRED =
+.
+EXPECT
+Format FRED redefined at - line 5.
+########
+# op.c
+use warnings 'syntax' ;
+push FRED;
+no warnings 'syntax' ;
+push FRED;
+EXPECT
+Array @FRED missing the @ in argument 1 of push() at - line 3.
+########
+# op.c
+use warnings 'syntax' ;
+@a = keys FRED ;
+no warnings 'syntax' ;
+@a = keys FRED ;
+EXPECT
+Hash %FRED missing the % in argument 1 of keys() at - line 3.
+########
+# op.c
+use warnings 'syntax' ;
+exec "$^X -e 1" ; 
+my $a
+EXPECT
+Statement unlikely to be reached at - line 4.
+(Maybe you meant system() when you said exec()?)
+########
+# op.c
+use warnings 'deprecated' ;
+my @a; defined(@a);
+EXPECT
+defined(@array) is deprecated at - line 3.
+(Maybe you should just omit the defined()?)
+########
+# op.c
+use warnings 'deprecated' ;
+defined(@a = (1,2,3));
+EXPECT
+defined(@array) is deprecated at - line 3.
+(Maybe you should just omit the defined()?)
+########
+# op.c
+use warnings 'deprecated' ;
+my %h; defined(%h);
+EXPECT
+defined(%hash) is deprecated at - line 3.
+(Maybe you should just omit the defined()?)
+########
+# op.c
+no warnings 'syntax' ;
+exec "$^X -e 1" ; 
+my $a
+EXPECT
+
+########
+# op.c
+sub fred();
+sub fred($) {}
+EXPECT
+Prototype mismatch: sub main::fred () vs ($) at - line 3.
+########
+# op.c
+$^W = 0 ;
+sub fred() ;
+sub fred($) {}
+{
+    no warnings 'unsafe' ;
+    sub Fred() ;
+    sub Fred($) {}
+    use warnings 'unsafe' ;
+    sub freD() ;
+    sub freD($) {}
+}
+sub FRED() ;
+sub FRED($) {}
+EXPECT
+Prototype mismatch: sub main::fred () vs ($) at - line 4.
+Prototype mismatch: sub main::freD () vs ($) at - line 11.
+Prototype mismatch: sub main::FRED () vs ($) at - line 14.
+########
+# op.c
+use warnings 'syntax' ;
+join /---/, 'x', 'y', 'z';
+EXPECT
+/---/ should probably be written as "---" at - line 3.
+########
+# op.c [Perl_peep]
+use warnings 'unsafe' ;
+fred() ; 
+sub fred ($$) {}
+no warnings 'unsafe' ;
+joe() ; 
+sub joe ($$) {}
+EXPECT
+main::fred() called too early to check prototype at - line 3.
diff --git a/t/pragma/warn/perl b/t/pragma/warn/perl
new file mode 100644
index 0000000000..45807499d6
--- /dev/null
+++ b/t/pragma/warn/perl
@@ -0,0 +1,57 @@
+  perl.c	AOK
+
+  gv_check(defstash)
+	Name \"%s::%s\" used only once: possible typo 
+
+  Mandatory Warnings All TODO
+  ------------------
+  Recompile perl with -DDEBUGGING to use -D switch	[moreswitches]
+  Unbalanced scopes: %ld more ENTERs than LEAVEs	[perl_destruct]
+  Unbalanced saves: %ld more saves than restores	[perl_destruct]
+  Unbalanced tmps: %ld more allocs than frees		[perl_destruct]
+  Unbalanced context: %ld more PUSHes than POPs		[perl_destruct]
+  Unbalanced string table refcount: (%d) for \"%s\"	[perl_destruct]
+  Scalars leaked: %ld					[perl_destruct]
+
+
+__END__
+# perl.c
+no warnings 'once' ;
+$x = 3 ;
+use warnings 'once' ;
+$z = 3 ;
+EXPECT
+Name "main::z" used only once: possible typo at - line 5.
+########
+-w
+# perl.c
+$x = 3 ;
+no warnings 'once' ;
+$z = 3 
+EXPECT
+Name "main::x" used only once: possible typo at - line 3.
+########
+# perl.c
+BEGIN { $^W =1 ; }
+$x = 3 ;
+no warnings 'once' ;
+$z = 3 
+EXPECT
+Name "main::x" used only once: possible typo at - line 3.
+########
+-W
+# perl.c
+no warnings 'once' ;
+$x = 3 ;
+use warnings 'once' ;
+$z = 3 ;
+EXPECT
+Name "main::x" used only once: possible typo at - line 4.
+Name "main::z" used only once: possible typo at - line 6.
+########
+-X
+# perl.c
+use warnings 'once' ;
+$x = 3 ;
+EXPECT
+
diff --git a/t/pragma/warn/perlio b/t/pragma/warn/perlio
new file mode 100644
index 0000000000..18c0dfa89f
--- /dev/null
+++ b/t/pragma/warn/perlio
@@ -0,0 +1,10 @@
+  perlio.c 
+
+
+  Mandatory Warnings ALL TODO
+  ------------------
+    Setting cnt to %d
+    Setting ptr %p > end+1 %p
+    Setting cnt to %d, ptr implies %d
+
+__END__
diff --git a/t/pragma/warn/perly b/t/pragma/warn/perly
new file mode 100644
index 0000000000..afc5dccc72
--- /dev/null
+++ b/t/pragma/warn/perly
@@ -0,0 +1,31 @@
+  perly.y	AOK
+
+  dep() => deprecate("\"do\" to call subroutines") 
+  Use of "do" to call subroutines is deprecated
+
+	sub fred {} do fred()
+	sub fred {} do fred(1)
+	sub fred {} $a = "fred" ; do $a()
+	sub fred {} $a = "fred" ; do $a(1)
+
+
+__END__
+# perly.y
+use warnings 'deprecated' ;
+sub fred {} 
+do fred() ;
+do fred(1) ;
+$a = "fred" ; 
+do $a() ;
+do $a(1) ;
+no warnings 'deprecated' ;
+do fred() ;
+do fred(1) ;
+$a = "fred" ; 
+do $a() ;
+do $a(1) ;
+EXPECT
+Use of "do" to call subroutines is deprecated at - line 4.
+Use of "do" to call subroutines is deprecated at - line 5.
+Use of "do" to call subroutines is deprecated at - line 7.
+Use of "do" to call subroutines is deprecated at - line 8.
diff --git a/t/pragma/warn/pp b/t/pragma/warn/pp
new file mode 100644
index 0000000000..48b5ec86b5
--- /dev/null
+++ b/t/pragma/warn/pp
@@ -0,0 +1,125 @@
+  pp.c	TODO
+
+  substr outside of string
+    $a = "ab" ; $a = substr($a, 4,5)
+
+  Attempt to use reference as lvalue in substr 
+    $a = "ab" ; $b = \$a ;  substr($b, 1,1) = $b
+
+  uninitialized	in pp_rv2gv()
+	my *b = *{ undef()}
+
+  uninitialized	in pp_rv2sv()
+	my $a = undef ; my $b = $$a
+
+  Odd number of elements in hash list
+	my $a = { 1,2,3 } ;
+
+  Invalid type in unpack: '%c
+	my $A = pack ("A,A", 1,2) ;
+	my @A = unpack ("A,A", "22") ;
+
+  Attempt to pack pointer to temporary value
+	pack("p", "abc") ;
+
+  Explicit blessing to '' (assuming package main)
+	bless \[], "";
+
+  Constant subroutine %s undefined			<<<TODO
+  Constant subroutine (anonymous) undefined		<<<TODO
+
+  Mandatory Warnings
+  ------------------
+  Malformed UTF-8 character
+
+__END__
+# pp.c
+use warnings 'substr' ;
+$a = "ab" ; 
+$a = substr($a, 4,5);
+no warnings 'substr' ;
+$a = "ab" ; 
+$a = substr($a, 4,5);
+EXPECT
+substr outside of string at - line 4.
+########
+# pp.c
+use warnings 'substr' ;
+$a = "ab" ; 
+$b = \$a ;  
+substr($b, 1,1) = "ab" ;
+no warnings 'substr' ;
+substr($b, 1,1) = "ab" ;
+EXPECT
+Attempt to use reference as lvalue in substr at - line 5.
+########
+# pp.c
+use warnings 'uninitialized' ;
+# TODO
+EXPECT
+
+########
+# pp.c
+use warnings 'unsafe' ;
+my $a = { 1,2,3};
+no warnings 'unsafe' ;
+my $b = { 1,2,3};
+EXPECT
+Odd number of elements in hash assignment at - line 3.
+########
+# pp.c
+use warnings 'unsafe' ;
+my @a = unpack ("A,A", "22") ;
+my $a = pack ("A,A", 1,2) ;
+no warnings 'unsafe' ;
+my @b = unpack ("A,A", "22") ;
+my $b = pack ("A,A", 1,2) ;
+EXPECT
+Invalid type in unpack: ',' at - line 3.
+Invalid type in pack: ',' at - line 4.
+########
+# pp.c
+use warnings 'uninitialized' ;
+my $a = undef ; 
+my $b = $$a;
+no warnings 'uninitialized' ;
+my $c = $$a;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# pp.c
+use warnings 'unsafe' ;
+sub foo { my $a = "a"; return $a . $a++ . $a++ }
+my $a = pack("p", &foo) ;
+no warnings 'unsafe' ;
+my $b = pack("p", &foo) ;
+EXPECT
+Attempt to pack pointer to temporary value at - line 4.
+########
+# pp.c
+use warnings 'unsafe' ;
+bless \[], "" ;
+no warnings 'unsafe' ;
+bless \[], "" ;
+EXPECT
+Explicit blessing to '' (assuming package main) at - line 3.
+########
+# pp.c
+use utf8 ;
+$_ = "\x80  \xff" ;
+reverse ;
+EXPECT
+Malformed UTF-8 character at - line 4.
+########
+# pp.c
+use warnings 'utf8'  ;
+use utf8 ;
+$_ = "\x80  \xff" ;
+reverse ;
+no warnings 'utf8'  ;
+$_ = "\x80  \xff" ;
+reverse ;
+EXPECT
+\x80 will produce malformed UTF-8 character; use \x{80} for that at - line 4.
+\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 4.
+Malformed UTF-8 character at - line 5.
diff --git a/t/pragma/warn/pp_ctl b/t/pragma/warn/pp_ctl
new file mode 100644
index 0000000000..70e6d60e8d
--- /dev/null
+++ b/t/pragma/warn/pp_ctl
@@ -0,0 +1,217 @@
+  pp_ctl.c	AOK
+ 
+     Not enough format arguments	
+ 	format STDOUT =
+ 	@<<< @<<<
+ 	$a
+ 	.
+ 	write;
+     
+
+    Exiting substitution via %s
+	$_ = "abc" ;
+	while ($i ++ == 0)
+	{
+    	    s/ab/last/e ;
+	}
+
+    Exiting subroutine via %s		
+	sub fred { last }
+	{ fred() }
+
+    Exiting eval via %s	
+	{ eval "last" }
+
+    Exiting pseudo-block via %s 
+	@a = (1,2) ; @b = sort { last } @a ;
+
+    Exiting substitution via %s
+	$_ = "abc" ;
+	last fred:
+	while ($i ++ == 0)
+	{
+    	    s/ab/last fred/e ;
+	}
+
+
+    Exiting subroutine via %s
+	sub fred { last joe }
+	joe: { fred() }
+
+    Exiting eval via %s
+	fred: { eval "last fred" }
+
+    Exiting pseudo-block via %s 
+	@a = (1,2) ; fred: @b = sort { last fred } @a ;
+
+
+    Deep recursion on subroutine \"%s\"
+	sub fred
+	{
+    	  fred() if $a++ < 200
+	}
+	 
+	fred()
+
+      (in cleanup) foo bar
+	package Foo;
+	DESTROY { die "foo bar" }
+	{ bless [], 'Foo' for 1..10 }
+
+__END__
+# pp_ctl.c
+use warnings 'syntax' ;
+format STDOUT =
+@<<< @<<<
+1
+.
+write;
+EXPECT
+Not enough format arguments at - line 5.
+1
+########
+# pp_ctl.c
+no warnings 'syntax' ;
+format =
+@<<< @<<<
+1
+.
+write ;
+EXPECT
+1
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+$_ = "abc" ;
+ 
+while ($i ++ == 0)
+{
+    s/ab/last/e ;
+}
+no warnings 'unsafe' ;
+while ($i ++ == 0)
+{
+    s/ab/last/e ;
+}
+EXPECT
+Exiting substitution via last at - line 7.
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+sub fred { last }
+{ fred() }
+no warnings 'unsafe' ;
+sub joe { last }
+{ joe() }
+EXPECT
+Exiting subroutine via last at - line 3.
+########
+# pp_ctl.c
+{
+  eval "use warnings 'unsafe' ; last;" 
+}
+print STDERR $@ ;
+{
+  eval "no warnings 'unsafe' ;last;" 
+} 
+print STDERR $@ ;
+EXPECT
+Exiting eval via last at (eval 1) line 1.
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+@a = (1,2) ;
+@b = sort { last } @a ;
+no warnings 'unsafe' ;
+@b = sort { last } @a ;
+EXPECT
+Exiting pseudo-block via last at - line 4.
+Can't "last" outside a block at - line 4.
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+$_ = "abc" ;
+fred: 
+while ($i ++ == 0)
+{
+    s/ab/last fred/e ;
+}
+no warnings 'unsafe' ;
+while ($i ++ == 0)
+{
+    s/ab/last fred/e ;
+}
+EXPECT
+Exiting substitution via last at - line 7.
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+sub fred { last joe }
+joe: { fred() }
+no warnings 'unsafe' ;
+sub Fred { last Joe }
+Joe: { Fred() }
+EXPECT
+Exiting subroutine via last at - line 3.
+########
+# pp_ctl.c
+joe:
+{ eval "use warnings 'unsafe' ; last joe;" }
+print STDERR $@ ;
+Joe:
+{ eval "no warnings 'unsafe' ; last Joe;" }
+print STDERR $@ ;
+EXPECT
+Exiting eval via last at (eval 1) line 1.
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+@a = (1,2) ;
+fred: @b = sort { last fred } @a ;
+no warnings 'unsafe' ;
+Fred: @b = sort { last Fred } @a ;
+EXPECT
+Exiting pseudo-block via last at - line 4.
+Label not found for "last fred" at - line 4.
+########
+# pp_ctl.c
+use warnings 'recursion' ;
+BEGIN { warn "PREFIX\n" ;}
+sub fred
+{
+    fred() if $a++ < 200
+}
+ 
+fred()
+EXPECT
+Deep recursion on subroutine "main::fred" at - line 6.
+########
+# pp_ctl.c
+no warnings 'recursion' ;
+BEGIN { warn "PREFIX\n" ;}
+sub fred
+{
+    fred() if $a++ < 200
+}
+ 
+fred()
+EXPECT
+########
+# pp_ctl.c
+use warnings 'unsafe' ;
+package Foo;
+DESTROY { die "@{$_[0]} foo bar" }
+{ bless ['A'], 'Foo' for 1..10 }
+{ bless ['B'], 'Foo' for 1..10 }
+EXPECT
+	(in cleanup) A foo bar at - line 4.
+	(in cleanup) B foo bar at - line 4.
+########
+# pp_ctl.c
+no warnings 'unsafe' ;
+package Foo;
+DESTROY { die "@{$_[0]} foo bar" }
+{ bless ['A'], 'Foo' for 1..10 }
+{ bless ['B'], 'Foo' for 1..10 }
+EXPECT
+
diff --git a/t/pragma/warn/pp_hot b/t/pragma/warn/pp_hot
new file mode 100644
index 0000000000..6bd315148f
--- /dev/null
+++ b/t/pragma/warn/pp_hot
@@ -0,0 +1,192 @@
+  pp_hot.c	
+
+  Filehandle %s never opened			[pp_print]
+    $f = $a = "abc" ; print $f $a
+
+  Filehandle %s opened only for input		[pp_print]
+    print STDIN "abc" ;
+
+  Filehandle %s opened only for output		[pp_print]
+    print <STDOUT> ;
+
+  print on closed filehandle %s			[pp_print]
+    close STDIN ; print STDIN "abc" ;
+
+  uninitialized					[pp_rv2av]
+	my $a = undef ; my @b = @$a
+
+  uninitialized					[pp_rv2hv]
+	my $a = undef ; my %b = %$a
+
+  Odd number of elements in hash list		[pp_aassign]
+	%X = (1,2,3) ;
+
+  Reference found where even-sized list expected [pp_aassign]
+	$X = [ 1 ..3 ];
+
+  Filehandle %s opened only for output		[Perl_do_readline] 
+  	open (FH, ">./xcv") ;
+	my $a = <FH> ;
+
+  glob failed (can't start child: %s)		[Perl_do_readline] <<TODO
+
+  Read on closed filehandle %s			[Perl_do_readline]
+    close STDIN ; $a = <STDIN>;
+
+  glob failed (child exited with status %d%s)	[Perl_do_readline] <<TODO
+
+  Deep recursion on subroutine \"%s\"		[Perl_sub_crush_depth]
+     sub fred { fred() if $a++ < 200} fred()
+
+  Deep recursion on anonymous subroutine 	[Perl_sub_crush_depth]
+     $a = sub { &$a if $a++ < 200} &$a
+
+
+__END__
+# pp_hot.c [pp_print]
+use warnings 'unopened' ;
+$f = $a = "abc" ; 
+print $f $a;
+no warnings 'unopened' ;
+print $f $a;
+EXPECT
+Filehandle main::abc never opened at - line 4.
+########
+# pp_hot.c [pp_print]
+use warnings 'io' ;
+print STDIN "anc";
+print <STDOUT>;
+print <STDERR>;
+open(FOO, ">&STDOUT") and print <FOO>;
+print getc(STDERR);
+print getc(FOO);
+####################################################################
+# The next test is known to fail on some systems (Linux/BSD+glibc, #
+# NeXT among others.  glibc should be fixed in the next version,   #
+# but it appears other platforms have little hope.  We skip it for #
+# now (on the grounds that it is "just" a warning).                #
+####################################################################
+#read(FOO,$_,1);
+no warnings 'io' ;
+print STDIN "anc";
+EXPECT
+Filehandle main::STDIN opened only for input at - line 3.
+Filehandle main::STDOUT opened only for output at - line 4.
+Filehandle main::STDERR opened only for output at - line 5.
+Filehandle main::FOO opened only for output at - line 6.
+Filehandle main::STDERR opened only for output at - line 7.
+Filehandle main::FOO opened only for output at - line 8.
+########
+# pp_hot.c [pp_print]
+use warnings 'closed' ;
+close STDIN ;
+print STDIN "anc";
+no warnings 'closed' ;
+print STDIN "anc";
+EXPECT
+print on closed filehandle main::STDIN at - line 4.
+########
+# pp_hot.c [pp_rv2av]
+use warnings 'uninitialized' ;
+my $a = undef ;
+my @b = @$a;
+no warnings 'uninitialized' ;
+my @c = @$a;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# pp_hot.c [pp_rv2hv]
+use warnings 'uninitialized' ;
+my $a = undef ;
+my %b = %$a;
+no warnings 'uninitialized' ;
+my %c = %$a;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# pp_hot.c [pp_aassign]
+use warnings 'unsafe' ;
+my %X ; %X = (1,2,3) ;
+no warnings 'unsafe' ;
+my %Y ; %Y = (1,2,3) ;
+EXPECT
+Odd number of elements in hash assignment at - line 3.
+########
+# pp_hot.c [pp_aassign]
+use warnings 'unsafe' ;
+my %X ; %X = [1 .. 3] ;
+no warnings 'unsafe' ;
+my %Y ; %Y = [1 .. 3] ;
+EXPECT
+Reference found where even-sized list expected at - line 3.
+########
+# pp_hot.c [Perl_do_readline]
+use warnings 'closed' ;
+close STDIN ; $a = <STDIN> ;
+no warnings 'closed' ;
+$a = <STDIN> ;
+EXPECT
+Read on closed filehandle main::STDIN at - line 3.
+########
+# pp_hot.c [Perl_do_readline]
+use warnings 'io' ;
+my $file = "./xcv" ; unlink $file ;
+open (FH, ">./xcv") ;
+my $a = <FH> ;
+no warnings 'io' ;
+$a = <FH> ;
+unlink $file ;
+EXPECT
+Filehandle main::FH opened only for output at - line 5.
+########
+# pp_hot.c [Perl_sub_crush_depth]
+use warnings 'recursion' ;
+sub fred 
+{ 
+    fred() if $a++ < 200
+} 
+{
+  local $SIG{__WARN__} = sub {
+    die "ok\n" if $_[0] =~ /^Deep recursion on subroutine "main::fred"/
+  };
+  fred();
+}
+EXPECT
+ok
+########
+# pp_hot.c [Perl_sub_crush_depth]
+no warnings 'recursion' ;
+sub fred 
+{ 
+    fred() if $a++ < 200
+} 
+{
+  local $SIG{__WARN__} = sub {
+    die "ok\n" if $_[0] =~ /^Deep recursion on subroutine "main::fred"/
+  };
+  fred();
+}
+EXPECT
+
+########
+# pp_hot.c [Perl_sub_crush_depth]
+use warnings 'recursion' ;
+$b = sub 
+{ 
+    &$b if $a++ < 200
+}  ;
+
+&$b ;
+EXPECT
+Deep recursion on anonymous subroutine at - line 5.
+########
+# pp_hot.c [Perl_sub_crush_depth]
+no warnings 'recursion' ;
+$b = sub 
+{ 
+    &$b if $a++ < 200
+}  ;
+
+&$b ;
+EXPECT
+
diff --git a/t/pragma/warn/pp_sys b/t/pragma/warn/pp_sys
new file mode 100644
index 0000000000..651cdf9515
--- /dev/null
+++ b/t/pragma/warn/pp_sys
@@ -0,0 +1,259 @@
+  pp_sys.c 	AOK
+
+  untie attempted while %d inner references still exist	[pp_untie]
+    sub TIESCALAR { bless [] } ; tie $a, 'main'; untie $a ;
+
+  Filehandle %s opened only for input		[pp_leavewrite]
+    format STDIN =
+    .
+    write STDIN;
+
+  Write on closed filehandle %s			[pp_leavewrite]
+    format STDIN =
+    .
+    close STDIN;
+    write STDIN ;
+
+  page overflow	 				[pp_leavewrite]
+
+  Filehandle %s never opened			[pp_prtf]
+    $a = "abc"; printf $a "fred"
+
+  Filehandle %s opened only for input		[pp_prtf]
+    $a = "abc"; 
+    printf $a "fred"
+
+  printf on closed filehandle %s		[pp_prtf]
+    close STDIN ;
+    printf STDIN "fred"
+
+  Syswrite on closed filehandle			[pp_send]
+    close STDIN; 
+    syswrite STDIN, "fred", 1;
+
+  Send on closed socket				[pp_send]
+    close STDIN; 
+    send STDIN, "fred", 1
+
+  bind() on closed fd				[pp_bind]
+    close STDIN; 
+    bind STDIN, "fred" ;
+
+
+  connect() on closed fd			[pp_connect]
+    close STDIN; 
+    connect STDIN, "fred" ;
+
+  listen() on closed fd				[pp_listen]
+    close STDIN; 
+    listen STDIN, 2;
+
+  accept() on closed fd				[pp_accept]
+    close STDIN; 
+    accept STDIN, "fred" ;
+
+  shutdown() on closed fd			[pp_shutdown]
+    close STDIN; 
+    shutdown STDIN, 0;
+
+  [gs]etsockopt() on closed fd			[pp_ssockopt]
+    close STDIN; 
+    setsockopt STDIN, 1,2,3;
+    getsockopt STDIN, 1,2;
+
+  get{sock, peer}name() on closed fd		[pp_getpeername]
+    close STDIN; 
+    getsockname STDIN;
+    getpeername STDIN;
+
+  warn(warn_nl, "stat");			[pp_stat]
+
+  Test on unopened file <%s>
+	close STDIN ; -T STDIN ;
+
+  warn(warn_nl, "open");			[pp_fttext]
+    -T "abc\ndef" ;
+
+  Filehandle %s opened only for output		[pp_sysread]
+	my $file = "./xcv" ;
+	open(F, ">$file") ; 
+	my $a = sysread(F, $a,10) ;
+  
+  
+
+__END__
+# pp_sys.c [pp_untie]
+use warnings 'untie' ;
+sub TIESCALAR { bless [] } ; 
+$b = tie $a, 'main'; 
+untie $a ;
+no warnings 'untie' ;
+$c = tie $d, 'main'; 
+untie $d ;
+EXPECT
+untie attempted while 1 inner references still exist at - line 5.
+########
+# pp_sys.c [pp_leavewrite]
+use warnings 'io' ;
+format STDIN =
+.
+write STDIN;
+no warnings 'io' ;
+write STDIN;
+EXPECT
+Filehandle main::STDIN opened only for input at - line 5.
+########
+# pp_sys.c [pp_leavewrite]
+use warnings 'closed' ;
+format STDIN =
+.
+close STDIN;
+write STDIN;
+no warnings 'closed' ;
+write STDIN;
+EXPECT
+Write on closed filehandle main::STDIN at - line 6.
+########
+# pp_sys.c [pp_leavewrite]
+use warnings 'io' ;
+format STDOUT_TOP =
+abc
+.
+format STDOUT =
+def
+ghi
+.
+$= = 1 ;
+$- =1 ;
+open STDOUT, ">".($^O eq 'VMS'? 'NL:' : '/dev/null') ;
+write ;
+no warnings 'io' ;
+write ;
+EXPECT
+page overflow at - line 13.
+########
+# pp_sys.c [pp_prtf]
+use warnings 'unopened' ;
+$a = "abc"; 
+printf $a "fred";
+no warnings 'unopened' ;
+printf $a "fred";
+EXPECT
+Filehandle main::abc never opened at - line 4.
+########
+# pp_sys.c [pp_prtf]
+use warnings 'closed' ;
+close STDIN ;
+printf STDIN "fred";
+no warnings 'closed' ;
+printf STDIN "fred";
+EXPECT
+printf on closed filehandle main::STDIN at - line 4.
+########
+# pp_sys.c [pp_prtf]
+use warnings 'io' ;
+printf STDIN "fred";
+no warnings 'io' ;
+printf STDIN "fred";
+EXPECT
+Filehandle main::STDIN opened only for input at - line 3.
+########
+# pp_sys.c [pp_send]
+use warnings 'closed' ;
+close STDIN; 
+syswrite STDIN, "fred", 1;
+no warnings 'closed' ;
+syswrite STDIN, "fred", 1;
+EXPECT
+Syswrite on closed filehandle at - line 4.
+########
+# pp_sys.c [pp_prtf pp_send pp_bind pp_connect pp_listen pp_accept pp_shutdown pp_ssockopt ppp_getpeername]
+use warnings 'io' ;
+use Config; 
+BEGIN { 
+  if ( $^O ne 'VMS' and ! $Config{d_socket}) {
+    print <<EOM ;
+SKIPPED
+# send not present
+# bind not present
+# connect not present
+# accept not present
+# shutdown not present
+# setsockopt not present
+# getsockopt not present
+# getsockname not present
+# getpeername not present
+EOM
+    exit ;
+  } 
+}
+close STDIN; 
+send STDIN, "fred", 1;
+bind STDIN, "fred" ;
+connect STDIN, "fred" ;
+listen STDIN, 2;
+accept STDIN, "fred" ;
+shutdown STDIN, 0;
+setsockopt STDIN, 1,2,3;
+getsockopt STDIN, 1,2;
+getsockname STDIN;
+getpeername STDIN;
+no warnings 'io' ;
+send STDIN, "fred", 1;
+bind STDIN, "fred" ;
+connect STDIN, "fred" ;
+listen STDIN, 2;
+accept STDIN, "fred" ;
+shutdown STDIN, 0;
+setsockopt STDIN, 1,2,3;
+getsockopt STDIN, 1,2;
+getsockname STDIN;
+getpeername STDIN;
+EXPECT
+Send on closed socket at - line 22.
+bind() on closed fd at - line 23.
+connect() on closed fd at - line 24.
+listen() on closed fd at - line 25.
+accept() on closed fd at - line 26.
+shutdown() on closed fd at - line 27.
+[gs]etsockopt() on closed fd at - line 28.
+[gs]etsockopt() on closed fd at - line 29.
+get{sock, peer}name() on closed fd at - line 30.
+get{sock, peer}name() on closed fd at - line 31.
+########
+# pp_sys.c [pp_stat]
+use warnings 'newline' ;
+stat "abc\ndef";
+no warnings 'newline' ;
+stat "abc\ndef";
+EXPECT
+Unsuccessful stat on filename containing newline at - line 3.
+########
+# pp_sys.c [pp_fttext]
+use warnings 'unopened' ;
+close STDIN ; 
+-T STDIN ;
+no warnings 'unopened' ;
+-T STDIN ;
+EXPECT
+Test on unopened file <STDIN> at - line 4.
+########
+# pp_sys.c [pp_fttext]
+use warnings 'newline' ;
+-T "abc\ndef" ;
+no warnings 'newline' ;
+-T "abc\ndef" ;
+EXPECT
+Unsuccessful open on filename containing newline at - line 3.
+########
+# pp_sys.c [pp_sysread]
+use warnings 'io' ;
+my $file = "./xcv" ;
+open(F, ">$file") ; 
+my $a = sysread(F, $a,10) ;
+no warnings 'io' ;
+my $a = sysread(F, $a,10) ;
+close F ;
+unlink $file ;
+EXPECT
+Filehandle main::F opened only for output at - line 5.
diff --git a/t/pragma/warn/regcomp b/t/pragma/warn/regcomp
new file mode 100644
index 0000000000..9c3677ee10
--- /dev/null
+++ b/t/pragma/warn/regcomp
@@ -0,0 +1,75 @@
+  regcomp.c	AOK
+
+  Strange *+?{} on zero-length expression	[S_study_chunk]
+	/(?=a)?/
+
+  %.*s matches null string many times   	[S_regpiece]
+	$a = "ABC123" ; $a =~ /(?=a)*/'
+
+  /%.127s/: Unrecognized escape \\%c passed through"	[S_regatom] 
+  	/\m/
+
+  Character class syntax [. .] is reserved for future extensions [S_regpposixcc]
+
+  Character class syntax [= =] is reserved for future extensions [S_checkposixcc]
+
+  Character class syntax [%c %c] belongs inside character classes [S_checkposixcc] 
+  
+
+  
+
+__END__
+# regcomp.c [S_regpiece]
+use warnings 'unsafe' ;
+my $a = "ABC123" ; 
+$a =~ /(?=a)*/ ;
+no warnings 'unsafe' ;
+$a =~ /(?=a)*/ ;
+EXPECT
+(?=a)* matches null string many times at - line 4.
+########
+# regcomp.c [S_study_chunk]
+use warnings 'unsafe' ;
+$_ = "" ;
+/(?=a)?/;
+no warnings 'unsafe' ;
+/(?=a)?/;
+EXPECT
+Strange *+?{} on zero-length expression at - line 4.
+########
+# regcomp.c [S_regatom]
+use warnings 'unsafe' ;
+$a =~ /\m/ ;
+no warnings 'unsafe' ;
+EXPECT
+Unrecognized escape \m passed through at - line 3.
+########
+# regcomp.c [S_regpposixcc S_checkposixcc]
+use warnings 'unsafe' ;
+$_ = "" ;
+/[:alpha:]/;
+/[.bar.]/;
+/[=zog=]/;
+/[[:alpha:]]/;
+/[[.foo.]]/;
+/[[=bar=]]/;
+/[:zog:]/;
+no warnings 'unsafe' ;
+/[:alpha:]/;
+/[.foo.]/;
+/[=bar=]/;
+/[[:alpha:]]/;
+/[[.foo.]]/;
+/[[=bar=]]/;
+/[:zog:]/;
+/[[:zog:]]/;
+EXPECT
+Character class syntax [: :] belongs inside character classes at - line 4.
+Character class syntax [. .] belongs inside character classes at - line 5.
+Character class syntax [. .] is reserved for future extensions at - line 5.
+Character class syntax [= =] belongs inside character classes at - line 6.
+Character class syntax [= =] is reserved for future extensions at - line 6.
+Character class syntax [. .] is reserved for future extensions at - line 8.
+Character class syntax [= =] is reserved for future extensions at - line 9.
+Character class syntax [: :] belongs inside character classes at - line 10.
+Character class [:zog:] unknown at - line 19.
diff --git a/t/pragma/warn/regexec b/t/pragma/warn/regexec
new file mode 100644
index 0000000000..b9ba790832
--- /dev/null
+++ b/t/pragma/warn/regexec
@@ -0,0 +1,119 @@
+  regexec.c	
+
+  This test generates "bad free" warnings when run under
+  PERL_DESTRUCT_LEVEL.  This file merely serves as a placeholder
+  for investigation.
+
+  Complex regular subexpression recursion limit (%d) exceeded
+
+        $_ = 'a' x (2**15+1); /^()(a\1)*$/ ;
+  Complex regular subexpression recursion limit (%d) exceeded
+
+        $_ = 'a' x (2**15+1); /^()(a\1)*?$/ ;
+
+  (The actual value substituted for %d is masked in the tests so that
+  REG_INFTY configuration variable value does not affect outcome.)
+__END__
+# regexec.c
+print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
+use warnings 'unsafe' ;
+$SIG{__WARN__} = sub{local ($m) = shift;
+                 $m =~ s/\(\d+\)/(*MASKED*)/;
+                 print STDERR $m};
+$_ = 'a' x (2**15+1); 
+/^()(a\1)*$/ ;
+#
+# If this test fails with a segmentation violation or similar,
+# you may have to increase the default stacksize limit in your
+# shell.  You may need superuser privileges.
+#
+# Under the sh, ksh, zsh:
+#    $ ulimit -s
+#    8192
+#    $ ulimit -s 16000
+#
+# Under the csh:
+#    % limit stacksize
+#    stacksize        8192 kbytes
+#    % limit stacksize 16000
+#
+EXPECT
+Complex regular subexpression recursion limit (*MASKED*) exceeded at - line 9.
+########
+# regexec.c
+print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
+no warnings 'unsafe' ;
+$SIG{__WARN__} = sub{local ($m) = shift;
+                 $m =~ s/\(\d+\)/(*MASKED*)/;
+                 print STDERR $m};
+$_ = 'a' x (2**15+1); 
+/^()(a\1)*$/ ;
+#
+# If this test fails with a segmentation violation or similar,
+# you may have to increase the default stacksize limit in your
+# shell.  You may need superuser privileges.
+#
+# Under the sh, ksh, zsh:
+#    $ ulimit -s
+#    8192
+#    $ ulimit -s 16000
+#
+# Under the csh:
+#    % limit stacksize
+#    stacksize        8192 kbytes
+#    % limit stacksize 16000
+#
+EXPECT
+
+########
+# regexec.c
+print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
+use warnings 'unsafe' ;
+$SIG{__WARN__} = sub{local ($m) = shift;
+                 $m =~ s/\(\d+\)/(*MASKED*)/;
+                 print STDERR $m};
+$_ = 'a' x (2**15+1);
+/^()(a\1)*?$/ ;
+#
+# If this test fails with a segmentation violation or similar,
+# you may have to increase the default stacksize limit in your
+# shell.  You may need superuser privileges.
+#
+# Under the sh, ksh, zsh:
+#    $ ulimit -s
+#    8192
+#    $ ulimit -s 16000
+#
+# Under the csh:
+#    % limit stacksize
+#    stacksize        8192 kbytes
+#    % limit stacksize 16000
+#
+EXPECT
+Complex regular subexpression recursion limit (*MASKED*) exceeded at - line 9.
+########
+# regexec.c
+print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
+no warnings 'unsafe' ;
+$SIG{__WARN__} = sub{local ($m) = shift;
+                 $m =~ s/\(\d+\)/(*MASKED*)/;
+                 print STDERR $m};
+$_ = 'a' x (2**15+1);
+/^()(a\1)*?$/ ;
+#
+# If this test fails with a segmentation violation or similar,
+# you may have to increase the default stacksize limit in your
+# shell.  You may need superuser privileges.
+#
+# Under the sh, ksh, zsh:
+#    $ ulimit -s
+#    8192
+#    $ ulimit -s 16000
+#
+# Under the csh:
+#    % limit stacksize
+#    stacksize        8192 kbytes
+#    % limit stacksize 16000
+#
+EXPECT
+
diff --git a/t/pragma/warn/run b/t/pragma/warn/run
new file mode 100644
index 0000000000..7a4be20e70
--- /dev/null
+++ b/t/pragma/warn/run
@@ -0,0 +1,8 @@
+  run.c 
+
+
+  Mandatory Warnings ALL TODO
+  ------------------
+        NULL OP IN RUN
+
+__END__
diff --git a/t/pragma/warn/sv b/t/pragma/warn/sv
new file mode 100644
index 0000000000..bac2c42545
--- /dev/null
+++ b/t/pragma/warn/sv
@@ -0,0 +1,282 @@
+  sv.c	
+
+  warn(warn_uninit);
+
+  warn(warn_uninit);
+
+  warn(warn_uninit);
+
+  warn(warn_uninit);
+
+  not_a_number(sv);
+
+  not_a_number(sv);
+
+  warn(warn_uninit);
+
+  not_a_number(sv);
+
+  warn(warn_uninit);
+
+  not_a_number(sv);
+
+  not_a_number(sv);
+
+  warn(warn_uninit);
+
+  warn(warn_uninit);
+
+  Subroutine %s redefined	
+
+  Invalid conversion in %s:
+
+  Undefined value assigned to typeglob
+
+  Reference is already weak			[Perl_sv_rvweaken] <<TODO
+
+  Mandatory Warnings
+  ------------------
+  Malformed UTF-8 character [sv_pos_b2u]
+      my $a = rindex "a\xff bc ", "bc" ;
+
+  Mandatory Warnings TODO
+  ------------------
+    Attempt to free non-arena SV: 0x%lx		[del_sv]
+    Reference miscount in sv_replace()		[sv_replace]
+    Attempt to free unreferenced scalar		[sv_free]
+    Attempt to free temp prematurely: SV 0x%lx	[sv_free]
+    semi-panic: attempt to dup freed string	[newSVsv]
+    
+
+__END__
+# sv.c
+use integer ;
+use warnings 'uninitialized' ;
+$x = 1 + $a[0] ; # a
+no warnings 'uninitialized' ;
+$x = 1 + $b[0] ; # a
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# sv.c (sv_2iv)
+package fred ;
+sub TIESCALAR { my $x ; bless \$x}
+sub FETCH { return undef }
+sub STORE { return 1 }
+package main ;
+tie $A, 'fred' ;
+use integer ;
+use warnings 'uninitialized' ;
+$A *= 2 ;
+no warnings 'uninitialized' ;
+$A *= 2 ;
+EXPECT
+Use of uninitialized value at - line 10.
+########
+# sv.c
+use integer ;
+use warnings 'uninitialized' ;
+my $x *= 2 ; #b 
+no warnings 'uninitialized' ;
+my $y *= 2 ; #b 
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# sv.c (sv_2uv)
+package fred ;
+sub TIESCALAR { my $x ; bless \$x}
+sub FETCH { return undef }
+sub STORE { return 1 }
+package main ;
+tie $A, 'fred' ;
+use warnings 'uninitialized' ;
+$B = 0 ;
+$B |= $A ;
+no warnings 'uninitialized' ;
+$B = 0 ;
+$B |= $A ;
+EXPECT
+Use of uninitialized value at - line 10.
+########
+# sv.c
+use warnings 'uninitialized' ;
+my $Y = 1 ; 
+my $x = 1 | $a[$Y] ;
+no warnings 'uninitialized' ;
+my $Y = 1 ; 
+$x = 1 | $b[$Y] ;
+EXPECT
+Use of uninitialized value at - line 4.
+########
+# sv.c
+use warnings 'uninitialized' ;
+my $x *= 1 ; # d
+no warnings 'uninitialized' ;
+my $y *= 1 ; # d
+EXPECT
+Use of uninitialized value at - line 3.
+########
+# sv.c
+use warnings 'uninitialized' ;
+$x = 1 + $a[0] ; # e
+no warnings 'uninitialized' ;
+$x = 1 + $b[0] ; # e
+EXPECT
+Use of uninitialized value at - line 3.
+########
+# sv.c (sv_2nv)
+package fred ;
+sub TIESCALAR { my $x ; bless \$x}
+sub FETCH { return undef }
+sub STORE { return 1 }
+package main ;
+tie $A, 'fred' ;
+use warnings 'uninitialized' ;
+$A *= 2 ;
+no warnings 'uninitialized' ;
+$A *= 2 ;
+EXPECT
+Use of uninitialized value at - line 9.
+########
+# sv.c
+use warnings 'uninitialized' ;
+$x = $y + 1 ; # f
+no warnings 'uninitialized' ;
+$x = $z + 1 ; # f
+EXPECT
+Use of uninitialized value at - line 3.
+########
+# sv.c
+use warnings 'uninitialized' ;
+$x = chop undef ; # g
+no warnings 'uninitialized' ;
+$x = chop undef ; # g
+EXPECT
+Modification of a read-only value attempted at - line 3.
+########
+# sv.c
+use warnings 'uninitialized' ;
+$x = chop $y ; # h
+no warnings 'uninitialized' ;
+$x = chop $z ; # h
+EXPECT
+Use of uninitialized value at - line 3.
+########
+# sv.c (sv_2pv)
+package fred ;
+sub TIESCALAR { my $x ; bless \$x}
+sub FETCH { return undef }
+sub STORE { return 1 }
+package main ;
+tie $A, 'fred' ;
+use warnings 'uninitialized' ;
+$B = "" ;
+$B .= $A ;
+no warnings 'uninitialized' ;
+$C = "" ;
+$C .= $A ;
+EXPECT
+Use of uninitialized value at - line 10.
+########
+# sv.c 
+use warnings 'numeric' ;
+sub TIESCALAR{bless[]} ; 
+sub FETCH {"def"} ; 
+tie $a,"main" ; 
+my $b = 1 + $a;
+no warnings 'numeric' ;
+my $c = 1 + $a;
+EXPECT
+Argument "def" isn't numeric in add at - line 6.
+########
+# sv.c
+use warnings 'numeric' ;
+my $x = 1 + "def" ;
+no warnings 'numeric' ;
+my $z = 1 + "def" ;
+EXPECT
+Argument "def" isn't numeric in add at - line 3.
+########
+# sv.c
+use warnings 'numeric' ;
+my $a = "def" ;
+my $x = 1 + $a ;
+no warnings 'numeric' ;
+my $y = 1 + $a ;
+EXPECT
+Argument "def" isn't numeric in add at - line 4.
+########
+# sv.c
+use warnings 'numeric' ; use integer ;
+my $a = "def" ;
+my $x = 1 + $a ;
+no warnings 'numeric' ;
+my $z = 1 + $a ;
+EXPECT
+Argument "def" isn't numeric in i_add at - line 4.
+########
+# sv.c
+use warnings 'numeric' ;
+my $x = 1 & "def" ;
+no warnings 'numeric' ;
+my $z = 1 & "def" ;
+EXPECT
+Argument "def" isn't numeric in bit_and at - line 3.
+########
+# sv.c
+use warnings 'redefine' ;
+sub fred {}  
+sub joe {} 
+*fred = \&joe ;
+no warnings 'redefine' ;
+sub jim {} 
+*jim = \&joe ;
+EXPECT
+Subroutine fred redefined at - line 5.
+########
+# sv.c
+use warnings 'printf' ;
+open F, ">".($^O eq 'VMS'? 'NL:' : '/dev/null') ;
+printf F "%z\n" ;
+my $a = sprintf "%z" ;
+printf F "%" ;
+$a = sprintf "%" ;
+printf F "%\x02" ;
+$a = sprintf "%\x02" ;
+no warnings 'printf' ;
+printf F "%z\n" ;
+$a = sprintf "%z" ;
+printf F "%" ;
+$a = sprintf "%" ;
+printf F "%\x02" ;
+$a = sprintf "%\x02" ;
+EXPECT
+Invalid conversion in sprintf: "%z" at - line 5.
+Invalid conversion in sprintf: end of string at - line 7.
+Invalid conversion in sprintf: "%\002" at - line 9.
+Invalid conversion in printf: "%z" at - line 4.
+Invalid conversion in printf: end of string at - line 6.
+Invalid conversion in printf: "%\002" at - line 8.
+########
+# sv.c
+use warnings 'unsafe' ;
+*a = undef ;
+no warnings 'unsafe' ;
+*b = undef ;
+EXPECT
+Undefined value assigned to typeglob at - line 3.
+########
+# sv.c
+use utf8 ;
+$^W =0 ;
+{
+  use warnings 'utf8' ;
+  my $a = rindex "a\xff bc ", "bc" ;
+  no warnings 'utf8' ;
+  $a = rindex "a\xff bc ", "bc" ;
+}
+my $a = rindex "a\xff bc ", "bc" ;
+EXPECT
+\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 6.
+Malformed UTF-8 character at - line 6.
+Malformed UTF-8 character at - line 10.
diff --git a/t/pragma/warn/taint b/t/pragma/warn/taint
new file mode 100644
index 0000000000..fd6deed60f
--- /dev/null
+++ b/t/pragma/warn/taint
@@ -0,0 +1,49 @@
+  taint.c AOK
+
+  Insecure %s%s while running with -T switch
+
+__END__
+-T
+--FILE-- abc
+def
+--FILE--
+# taint.c
+open(FH, "<abc") ;
+$a = <FH> ;
+close FH ;
+chdir $a ;
+print "xxx\n" ;
+EXPECT
+Insecure dependency in chdir while running with -T switch at - line 5.
+########
+-TU
+--FILE-- abc
+def
+--FILE--
+# taint.c
+open(FH, "<abc") ;
+$a = <FH> ;
+close FH ;
+chdir $a ;
+print "xxx\n" ;
+EXPECT
+xxx
+########
+-TU
+--FILE-- abc
+def
+--FILE--
+# taint.c
+open(FH, "<abc") ;
+$a = <FH> ;
+close FH ;
+use warnings 'taint' ;
+chdir $a ;
+print "xxx\n" ;
+no warnings 'taint' ;
+chdir $a ;
+print "yyy\n" ;
+EXPECT
+Insecure dependency in chdir while running with -T switch at - line 6.
+xxx
+yyy
diff --git a/t/pragma/warn/toke b/t/pragma/warn/toke
new file mode 100644
index 0000000000..ee02efa813
--- /dev/null
+++ b/t/pragma/warn/toke
@@ -0,0 +1,611 @@
+toke.c	AOK
+
+    we seem to have lost a few ambiguous warnings!!
+
+ 
+             	1 if $a EQ $b ;
+             	1 if $a NE $b ;
+             	1 if $a LT $b ;
+             	1 if $a GT $b ;
+             	1 if $a GE $b ;
+             	1 if $a LE $b ;
+ 		$a = <<;
+ 		Use of comma-less variable list is deprecated 
+		(called 3 times via depcom)
+
+     \1 better written as $1 
+ 	use warnings 'syntax' ;
+ 	s/(abc)/\1/;
+ 
+     warn(warn_nosemi) 
+     Semicolon seems to be missing
+	$a = 1
+	&time ;
+
+
+     Reversed %c= operator 
+	my $a =+ 2 ;
+	$a =- 2 ;
+	$a =* 2 ;
+	$a =% 2 ;
+	$a =& 2 ;
+	$a =. 2 ;
+	$a =^ 2 ;
+	$a =| 2 ;
+	$a =< 2 ;
+	$a =/ 2 ;
+
+     Multidimensional syntax %.*s not supported 
+	my $a = $a[1,2] ;
+
+     You need to quote \"%s\"" 
+	sub fred {} ; $SIG{TERM} = fred;
+
+     Scalar value %.*s better written as $%.*s" 
+	@a[3] = 2;
+	@a{3} = 2;
+
+     Can't use \\%c to mean $%c in expression 
+	$_ = "ab" ; s/(ab)/\1/e;
+
+     Unquoted string "abc" may clash with future reserved word at - line 3.
+     warn(warn_reserved	
+	$a = abc;
+
+     chmod: mode argument is missing initial 0 
+	chmod 3;
+
+     Possible attempt to separate words with commas 
+	@a = qw(a, b, c) ;
+
+     Possible attempt to put comments in qw() list 
+	@a = qw(a b # c) ;
+
+     umask: argument is missing initial 0 
+	umask 3;
+
+     %s (...) interpreted as function 
+	print ("")
+	printf ("")
+	sort ("")
+
+     Ambiguous use of %c{%s%s} resolved to %c%s%s 
+	$a = ${time[2]}
+	$a = ${time{2}}
+
+
+     Ambiguous use of %c{%s} resolved to %c%s
+	$a = ${time}
+	sub fred {} $a = ${fred}
+
+     Misplaced _ in number 
+	$a = 1_2;
+	$a = 1_2345_6;
+
+    Bareword \"%s\" refers to nonexistent package
+	$a = FRED:: ;
+
+    Ambiguous call resolved as CORE::%s(), qualify as such or use &
+	sub time {} 
+	my $a = time()
+
+    Use of \\x{} without utf8 declaration
+	$_ = " \x{123} " ;
+
+
+    \x%.*s will produce malformed UTF-8 character; use \x{%.*s} for that
+        use utf8 ; 
+	$_ = "\xffe"
+
+    Unrecognized escape \\%c passed through
+        $a = "\m" ;
+
+    %s number > %s non-portable
+        my $a =  0b011111111111111111111111111111110 ;
+        $a =  0b011111111111111111111111111111111 ;
+        $a =  0b111111111111111111111111111111111 ;
+        $a =  0x0fffffffe ;
+        $a =  0x0ffffffff ;
+        $a =  0x1ffffffff ;
+        $a =  0037777777776 ;
+        $a =  0037777777777 ;
+        $a =  0047777777777 ;
+
+    Integer overflow in binary number
+        my $a =  0b011111111111111111111111111111110 ;
+        $a =  0b011111111111111111111111111111111 ;
+        $a =  0b111111111111111111111111111111111 ;
+        $a =  0x0fffffffe ;
+        $a =  0x0ffffffff ;
+        $a =  0x1ffffffff ;
+        $a =  0037777777776 ;
+        $a =  0037777777777 ;
+        $a =  0047777777777 ;
+     
+    Mandatory Warnings
+    ------------------
+    Use of "%s" without parentheses is ambiguous	[check_uni]
+        rand + 4 
+
+    Ambiguous use of -%s resolved as -&%s() 		[yylex]
+        sub fred {} ; - fred ;
+
+    Precedence problem: open %.*s should be open(%.*s)	[yylex]
+    	open FOO || die;
+
+    Operator or semicolon missing before %c%s		[yylex]
+    Ambiguous use of %c resolved as operator %c
+        *foo *foo
+
+__END__
+# toke.c 
+use warnings 'deprecated' ;
+1 if $a EQ $b ;
+1 if $a NE $b ;
+1 if $a GT $b ;
+1 if $a LT $b ;
+1 if $a GE $b ;
+1 if $a LE $b ;
+no warnings 'deprecated' ;
+1 if $a EQ $b ;
+1 if $a NE $b ;
+1 if $a GT $b ;
+1 if $a LT $b ;
+1 if $a GE $b ;
+1 if $a LE $b ;
+EXPECT
+Use of EQ is deprecated at - line 3.
+Use of NE is deprecated at - line 4.
+Use of GT is deprecated at - line 5.
+Use of LT is deprecated at - line 6.
+Use of GE is deprecated at - line 7.
+Use of LE is deprecated at - line 8.
+########
+# toke.c
+use warnings 'deprecated' ;
+format STDOUT =
+@<<<  @|||  @>>>  @>>>
+$a    $b    "abc" 'def'
+.
+no warnings 'deprecated' ;
+format STDOUT =
+@<<<  @|||  @>>>  @>>>
+$a    $b    "abc" 'def'
+.
+EXPECT
+Use of comma-less variable list is deprecated at - line 5.
+Use of comma-less variable list is deprecated at - line 5.
+Use of comma-less variable list is deprecated at - line 5.
+########
+# toke.c
+use warnings 'deprecated' ;
+$a = <<;
+
+no warnings 'deprecated' ;
+$a = <<;
+
+EXPECT
+Use of bare << to mean <<"" is deprecated at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+s/(abc)/\1/;
+no warnings 'syntax' ;
+s/(abc)/\1/;
+EXPECT
+\1 better written as $1 at - line 3.
+########
+# toke.c
+use warnings 'semicolon' ;
+$a = 1
+&time ;
+no warnings 'semicolon' ;
+$a = 1
+&time ;
+EXPECT
+Semicolon seems to be missing at - line 3.
+########
+# toke.c
+BEGIN {
+    # Scalars leaked: due to syntax errors
+    $ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3;
+}
+use warnings 'syntax' ;
+my $a =+ 2 ;
+$a =- 2 ;
+$a =* 2 ;
+$a =% 2 ;
+$a =& 2 ;
+$a =. 2 ;
+$a =^ 2 ;
+$a =| 2 ;
+$a =< 2 ;
+$a =/ 2 ;
+EXPECT
+Reversed += operator at - line 7.
+Reversed -= operator at - line 8.
+Reversed *= operator at - line 9.
+Reversed %= operator at - line 10.
+Reversed &= operator at - line 11.
+Reversed .= operator at - line 12.
+syntax error at - line 12, near "=."
+Reversed ^= operator at - line 13.
+syntax error at - line 13, near "=^"
+Reversed |= operator at - line 14.
+syntax error at - line 14, near "=|"
+Reversed <= operator at - line 15.
+Unterminated <> operator at - line 15.
+########
+# toke.c
+BEGIN {
+    # Scalars leaked: due to syntax errors
+    $ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3;
+}
+no warnings 'syntax' ;
+my $a =+ 2 ;
+$a =- 2 ;
+$a =* 2 ;
+$a =% 2 ;
+$a =& 2 ;
+$a =. 2 ;
+$a =^ 2 ;
+$a =| 2 ;
+$a =< 2 ;
+$a =/ 2 ;
+EXPECT
+syntax error at - line 12, near "=."
+syntax error at - line 13, near "=^"
+syntax error at - line 14, near "=|"
+Unterminated <> operator at - line 15.
+########
+# toke.c
+use warnings 'syntax' ;
+my $a = $a[1,2] ;
+no warnings 'syntax' ;
+my $a = $a[1,2] ;
+EXPECT
+Multidimensional syntax $a[1,2] not supported at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+sub fred {} ; $SIG{TERM} = fred;
+no warnings 'syntax' ;
+$SIG{TERM} = fred;
+EXPECT
+You need to quote "fred" at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+@a[3] = 2;
+@a{3} = 2;
+no warnings 'syntax' ;
+@a[3] = 2;
+@a{3} = 2;
+EXPECT
+Scalar value @a[3] better written as $a[3] at - line 3.
+Scalar value @a{3} better written as $a{3} at - line 4.
+########
+# toke.c
+use warnings 'syntax' ;
+$_ = "ab" ; 
+s/(ab)/\1/e;
+no warnings 'syntax' ;
+$_ = "ab" ; 
+s/(ab)/\1/e;
+EXPECT
+Can't use \1 to mean $1 in expression at - line 4.
+########
+# toke.c
+use warnings 'reserved' ;
+$a = abc;
+no warnings 'reserved' ;
+$a = abc;
+EXPECT
+Unquoted string "abc" may clash with future reserved word at - line 3.
+########
+# toke.c
+use warnings 'octal' ;
+chmod 3;
+no warnings 'octal' ;
+chmod 3;
+EXPECT
+chmod: mode argument is missing initial 0 at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+@a = qw(a, b, c) ;
+no warnings 'syntax' ;
+@a = qw(a, b, c) ;
+EXPECT
+Possible attempt to separate words with commas at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+@a = qw(a b #) ;
+no warnings 'syntax' ;
+@a = qw(a b #) ;
+EXPECT
+Possible attempt to put comments in qw() list at - line 3.
+########
+# toke.c
+use warnings 'octal' ;
+umask 3;
+no warnings 'octal' ;
+umask 3;
+EXPECT
+umask: argument is missing initial 0 at - line 3.
+########
+# toke.c
+use warnings 'syntax' ;
+print ("")
+EXPECT
+print (...) interpreted as function at - line 3.
+########
+# toke.c
+no warnings 'syntax' ;
+print ("")
+EXPECT
+
+########
+# toke.c
+use warnings 'syntax' ;
+printf ("")
+EXPECT
+printf (...) interpreted as function at - line 3.
+########
+# toke.c
+no warnings 'syntax' ;
+printf ("")
+EXPECT
+
+########
+# toke.c
+use warnings 'syntax' ;
+sort ("")
+EXPECT
+sort (...) interpreted as function at - line 3.
+########
+# toke.c
+no warnings 'syntax' ;
+sort ("")
+EXPECT
+
+########
+# toke.c
+use warnings 'ambiguous' ;
+$a = ${time[2]};
+no warnings 'ambiguous' ;
+$a = ${time[2]};
+EXPECT
+Ambiguous use of ${time[...]} resolved to $time[...] at - line 3.
+########
+# toke.c
+use warnings 'ambiguous' ;
+$a = ${time{2}};
+EXPECT
+Ambiguous use of ${time{...}} resolved to $time{...} at - line 3.
+########
+# toke.c
+no warnings 'ambiguous' ;
+$a = ${time{2}};
+EXPECT
+
+########
+# toke.c
+use warnings 'ambiguous' ;
+$a = ${time} ;
+no warnings 'ambiguous' ;
+$a = ${time} ;
+EXPECT
+Ambiguous use of ${time} resolved to $time at - line 3.
+########
+# toke.c
+use warnings 'ambiguous' ;
+sub fred {}
+$a = ${fred} ;
+no warnings 'ambiguous' ;
+$a = ${fred} ;
+EXPECT
+Ambiguous use of ${fred} resolved to $fred at - line 4.
+########
+# toke.c
+use warnings 'syntax' ;
+$a = 1_2;
+$a = 1_2345_6;
+no warnings 'syntax' ;
+$a = 1_2;
+$a = 1_2345_6;
+EXPECT
+Misplaced _ in number at - line 3.
+Misplaced _ in number at - line 4.
+Misplaced _ in number at - line 4.
+########
+# toke.c
+use warnings 'unsafe' ;
+#line 25 "bar"
+$a = FRED:: ;
+no warnings 'unsafe' ;
+#line 25 "bar"
+$a = FRED:: ;
+EXPECT
+Bareword "FRED::" refers to nonexistent package at bar line 25.
+########
+# toke.c
+use warnings 'ambiguous' ;
+sub time {}
+my $a = time() ;
+no warnings 'ambiguous' ;
+my $b = time() ;
+EXPECT
+Ambiguous call resolved as CORE::time(), qualify as such or use & at - line 4.
+########
+# toke.c
+use warnings 'utf8' ;
+eval <<'EOE';
+{
+#line 30 "foo"
+  $_ = " \x{123} " ;
+}
+EOE
+EXPECT
+Use of \x{} without utf8 declaration at foo line 30.
+########
+# toke.c
+no warnings 'utf8' ;
+eval <<'EOE';
+{
+#line 30 "foo"
+  $_ = " \x{123} " ;
+}
+EOE
+EXPECT
+
+########
+# toke.c
+use warnings 'utf8' ;
+use utf8 ;
+$_ = " \xffe " ;
+no warnings 'utf8' ;
+$_ = " \xffe " ;
+EXPECT
+\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 4.
+########
+# toke.c
+my $a = rand + 4 ;
+EXPECT
+Warning: Use of "rand" without parens is ambiguous at - line 2.
+########
+# toke.c
+$^W = 0 ;
+my $a = rand + 4 ;
+{
+    no warnings 'ambiguous' ;
+    $a = rand + 4 ;
+    use warnings 'ambiguous' ;
+    $a = rand + 4 ;
+}
+$a = rand + 4 ;
+EXPECT
+Warning: Use of "rand" without parens is ambiguous at - line 3.
+Warning: Use of "rand" without parens is ambiguous at - line 8.
+Warning: Use of "rand" without parens is ambiguous at - line 10.
+########
+# toke.c
+sub fred {};
+-fred ;
+EXPECT
+Ambiguous use of -fred resolved as -&fred() at - line 3.
+########
+# toke.c
+$^W = 0 ;
+sub fred {} ;
+-fred ;
+{
+    no warnings 'ambiguous' ;
+    -fred ;
+    use warnings 'ambiguous' ;
+    -fred ;
+}
+-fred ;
+EXPECT
+Ambiguous use of -fred resolved as -&fred() at - line 4.
+Ambiguous use of -fred resolved as -&fred() at - line 9.
+Ambiguous use of -fred resolved as -&fred() at - line 11.
+########
+# toke.c
+open FOO || time;
+EXPECT
+Precedence problem: open FOO should be open(FOO) at - line 2.
+########
+# toke.c
+$^W = 0 ;
+open FOO || time;
+{
+    no warnings 'ambiguous' ;
+    open FOO || time;
+    use warnings 'ambiguous' ;
+    open FOO || time;
+}
+open FOO || time;
+EXPECT
+Precedence problem: open FOO should be open(FOO) at - line 3.
+Precedence problem: open FOO should be open(FOO) at - line 8.
+Precedence problem: open FOO should be open(FOO) at - line 10.
+########
+# toke.c
+$^W = 0 ;
+*foo *foo ;
+{
+    no warnings 'ambiguous' ;
+    *foo *foo ;
+    use warnings 'ambiguous' ;
+    *foo *foo ;
+}
+*foo *foo ;
+EXPECT
+Operator or semicolon missing before *foo at - line 3.
+Ambiguous use of * resolved as operator * at - line 3.
+Operator or semicolon missing before *foo at - line 8.
+Ambiguous use of * resolved as operator * at - line 8.
+Operator or semicolon missing before *foo at - line 10.
+Ambiguous use of * resolved as operator * at - line 10.
+########
+# toke.c
+use warnings 'unsafe' ;
+my $a = "\m" ;
+no warnings 'unsafe' ;
+$a = "\m" ;
+EXPECT
+Unrecognized escape \m passed through at - line 3.
+########
+# toke.c
+use warnings 'portable' ;
+my $a =  0b011111111111111111111111111111110 ;
+   $a =  0b011111111111111111111111111111111 ;
+   $a =  0b111111111111111111111111111111111 ;
+   $a =  0x0fffffffe ;
+   $a =  0x0ffffffff ;
+   $a =  0x1ffffffff ;
+   $a =  0037777777776 ;
+   $a =  0037777777777 ;
+   $a =  0047777777777 ;
+no warnings 'portable' ;
+   $a =  0b011111111111111111111111111111110 ;
+   $a =  0b011111111111111111111111111111111 ;
+   $a =  0b111111111111111111111111111111111 ;
+   $a =  0x0fffffffe ;
+   $a =  0x0ffffffff ;
+   $a =  0x1ffffffff ;
+   $a =  0037777777776 ;
+   $a =  0037777777777 ;
+   $a =  0047777777777 ;
+EXPECT
+Binary number > 0b11111111111111111111111111111111 non-portable at - line 5.
+Hexadecimal number > 0xffffffff non-portable at - line 8.
+Octal number > 037777777777 non-portable at - line 11.
+########
+# toke.c
+use warnings 'overflow' ;
+my $a =  0b011111111111111111111111111111110 ;
+   $a =  0b011111111111111111111111111111111 ;
+   $a =  0b10000000000000000000000000000000000000000000000000000000000000000 ;
+   $a =  0x0fffffffe ;
+   $a =  0x0ffffffff ;
+   $a =  0x10000000000000000 ;
+   $a =  0037777777776 ;
+   $a =  0037777777777 ;
+   $a =  002000000000000000000000;
+no warnings 'overflow' ;
+   $a =  0b011111111111111111111111111111110 ;
+   $a =  0b011111111111111111111111111111111 ;
+   $a =  0b10000000000000000000000000000000000000000000000000000000000000000 ;
+   $a =  0x0fffffffe ;
+   $a =  0x0ffffffff ;
+   $a =  0x10000000000000000 ;
+   $a =  0037777777776 ;
+   $a =  0037777777777 ;
+   $a =  002000000000000000000000;
+EXPECT
+Integer overflow in binary number at - line 5.
+Integer overflow in hexadecimal number at - line 8.
+Integer overflow in octal number at - line 11.
diff --git a/t/pragma/warn/universal b/t/pragma/warn/universal
new file mode 100644
index 0000000000..6dbb1be4e0
--- /dev/null
+++ b/t/pragma/warn/universal
@@ -0,0 +1,16 @@
+  universal.c AOK
+
+  Can't locate package %s for @%s::ISA	[S_isa_lookup]
+      
+
+
+__END__
+# universal.c [S_isa_lookup]
+use warnings 'misc' ;
+@ISA = qw(Joe) ;
+my $a = bless [] ;
+UNIVERSAL::isa $a, Jim ;
+EXPECT
+Can't locate package Joe for @main::ISA at - line 5.
+Can't locate package Joe for @main::ISA.
+Can't locate package Joe for @main::ISA.
diff --git a/t/pragma/warn/utf8 b/t/pragma/warn/utf8
new file mode 100644
index 0000000000..b11514d826
--- /dev/null
+++ b/t/pragma/warn/utf8
@@ -0,0 +1,56 @@
+
+  utf8.c AOK
+
+  All Mandatory warnings
+ 
+     [utf8_to_uv]
+     Malformed UTF-8 character
+	my $a = ord "\x80" ;
+
+     Malformed UTF-8 character
+	my $a = ord "\xf080" ;
+
+     [utf16_to_utf8]
+     Malformed UTF-16 surrogate		
+     <<<<<< Add a test when somethig actually calls utf16_to_utf8
+
+__END__
+# utf8.c [utf8_to_uv]
+use utf8 ;
+my $a = ord "\x80" ;
+EXPECT
+Malformed UTF-8 character at - line 3.
+########
+# utf8.c [utf8_to_uv]
+use utf8 ;
+my $a = ord "\x80" ;
+{
+    use warnings 'utf8' ;
+    my $a = ord "\x80" ;
+    no warnings 'utf8' ;
+    my $a = ord "\x80" ;
+}
+EXPECT
+Malformed UTF-8 character at - line 3.
+\x80 will produce malformed UTF-8 character; use \x{80} for that at - line 6.
+Malformed UTF-8 character at - line 6.
+########
+# utf8.c [utf8_to_uv]
+use utf8 ;
+my $a = ord "\xf080" ;
+EXPECT
+Malformed UTF-8 character at - line 3.
+########
+# utf8.c [utf8_to_uv]
+use utf8 ;
+my $a = ord "\xf080" ;
+{
+    use warnings 'utf8' ;
+    my $a = ord "\xf080" ;
+    no warnings 'utf8' ;
+    my $a = ord "\xf080" ;
+}
+EXPECT
+Malformed UTF-8 character at - line 3.
+\xf0 will produce malformed UTF-8 character; use \x{f0} for that at - line 6.
+Malformed UTF-8 character at - line 6.
diff --git a/t/pragma/warn/util b/t/pragma/warn/util
new file mode 100644
index 0000000000..6c9bc8c696
--- /dev/null
+++ b/t/pragma/warn/util
@@ -0,0 +1,108 @@
+  util.c AOK
+ 
+     Illegal octal digit ignored 
+	my $a = oct "029" ;
+
+     Illegal hex digit ignored 
+	my $a = hex "0xv9" ;
+
+     Illegal binary digit ignored
+      my $a = oct "0b9" ;
+     
+     Integer overflow in binary number
+	my $a =  oct "0b111111111111111111111111111111111111111111" ;
+     Binary number > 0b11111111111111111111111111111111 non-portable
+   	$a =  oct "0b111111111111111111111111111111111" ;
+     Integer overflow in octal number
+	my $a =  oct "0777777777777777777777777777777777777777777777777" ;
+     Octal number > 037777777777 non-portable
+   	$a =  oct "0047777777777" ;
+     Integer overflow in hexadecimal number
+	my $a =  hex "0xffffffffffffffffffff" ;
+     Hexadecimal number > 0xffffffff non-portable
+   	$a =  hex "0x1ffffffff" ;
+
+__END__
+# util.c
+use warnings 'digit' ;
+my $a = oct "029" ;
+no warnings 'digit' ;
+$a = oct "029" ;
+EXPECT
+Illegal octal digit '9' ignored at - line 3.
+########
+# util.c
+use warnings 'digit' ;
+my $a =  hex "0xv9" ;
+no warnings 'digit' ;
+$a =  hex "0xv9" ;
+EXPECT
+Illegal hexadecimal digit 'v' ignored at - line 3.
+########
+# util.c
+use warnings 'digit' ;
+my $a =  oct "0b9" ;
+no warnings 'digit' ;
+$a =  oct "0b9" ;
+EXPECT
+Illegal binary digit '9' ignored at - line 3.
+########
+# util.c
+use warnings 'overflow' ;
+my $a =  oct "0b11111111111111111111111111111111111111111111111111111111111111111";
+no warnings 'overflow' ;
+$a =  oct "0b11111111111111111111111111111111111111111111111111111111111111111";
+EXPECT
+Integer overflow in binary number at - line 3.
+########
+# util.c
+use warnings 'overflow' ;
+my $a =  hex "0xffffffffffffffffffff" ;
+no warnings 'overflow' ;
+$a =  hex "0xffffffffffffffffffff" ;
+EXPECT
+Integer overflow in hexadecimal number at - line 3.
+########
+# util.c
+use warnings 'overflow' ;
+my $a =  oct "0777777777777777777777777777777777777777777777777" ;
+no warnings 'overflow' ;
+$a =  oct "0777777777777777777777777777777777777777777777777" ;
+EXPECT
+Integer overflow in octal number at - line 3.
+########
+# util.c
+use warnings 'portable' ;
+my $a =  oct "0b011111111111111111111111111111110" ;
+   $a =  oct "0b011111111111111111111111111111111" ;
+   $a =  oct "0b111111111111111111111111111111111" ;
+no warnings 'portable' ;
+   $a =  oct "0b011111111111111111111111111111110" ;
+   $a =  oct "0b011111111111111111111111111111111" ;
+   $a =  oct "0b111111111111111111111111111111111" ;
+EXPECT
+Binary number > 0b11111111111111111111111111111111 non-portable at - line 5.
+########
+# util.c
+use warnings 'portable' ;
+my $a =  hex "0x0fffffffe" ;
+   $a =  hex "0x0ffffffff" ;
+   $a =  hex "0x1ffffffff" ;
+no warnings 'portable' ;
+   $a =  hex "0x0fffffffe" ;
+   $a =  hex "0x0ffffffff" ;
+   $a =  hex "0x1ffffffff" ;
+EXPECT
+Hexadecimal number > 0xffffffff non-portable at - line 5.
+########
+# util.c
+use warnings 'portable' ;
+my $a =  oct "0037777777776" ;
+   $a =  oct "0037777777777" ;
+   $a =  oct "0047777777777" ;
+no warnings 'portable' ;
+   $a =  oct "0037777777776" ;
+   $a =  oct "0037777777777" ;
+   $a =  oct "0047777777777" ;
+EXPECT
+Octal number > 037777777777 non-portable at - line 5.