1 files changed, 1162 insertions, 0 deletions
diff --git a/lib/warnings/9enabled b/lib/warnings/9enabled
new file mode 100755
index 0000000000..f5579b2dde
--- /dev/null
+++ b/lib/warnings/9enabled
@@ -0,0 +1,1162 @@
+Check warnings::enabled & warnings::warn
+
+__END__
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+print "ok1\n" if ! warnings::enabled('all') ;
+print "ok2\n" if ! warnings::enabled("io") ;
+1;
+--FILE-- 
+no warnings;
+use abc ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+print "ok1\n" if !warnings::enabled('all') ;
+print "ok2\n" if warnings::enabled("syntax") ;
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'syntax' ;
+print "ok1\n" if   warnings::enabled('io') ;
+print "ok2\n" if ! warnings::enabled("syntax") ;
+1;
+--FILE-- 
+use warnings 'io' ;
+use abc ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc
+no warnings ;
+print "ok1\n" if !warnings::enabled('all') ;
+print "ok2\n" if warnings::enabled("syntax") ;
+1;
+--FILE-- 
+use warnings 'syntax' ;
+require "abc" ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc
+use warnings 'syntax' ;
+print "ok1\n" if ! warnings::enabled('all') ;
+print "ok2\n" if ! warnings::enabled("syntax") ;
+print "ok3\n" if   warnings::enabled("io") ;
+1;
+--FILE-- 
+use warnings 'io' ;
+require "abc" ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+sub check {
+  print "ok1\n" if !warnings::enabled('all') ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if ! warnings::enabled('all') ;
+  print "ok2\n" if   warnings::enabled("syntax") ;
+  print "ok3\n" if ! warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc
+package abc ;
+no warnings ;
+sub check {
+  print "ok1\n" if !warnings::enabled('all') ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+require "abc" ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if ! warnings::enabled('all') ;
+  print "ok2\n" if   warnings::enabled("syntax") ;
+  print "ok3\n" if ! warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+require "abc" ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+print "ok1\n" if ! warnings::enabled('all') ;
+print "ok2\n" if ! warnings::enabled("io") ;
+1;
+--FILE-- def.pm
+no warnings;
+use abc ;
+1;
+--FILE-- 
+use warnings;
+use def ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+print "ok1\n" if ! warnings::enabled('all') ;
+print "ok2\n" if warnings::enabled("syntax") ;
+print "ok3\n" if !warnings::enabled("io") ;
+1;
+--FILE-- def.pm
+use warnings 'syntax' ;
+print "ok4\n" if !warnings::enabled('all') ;
+print "ok5\n" if warnings::enabled("io") ;
+use abc ;
+1;
+--FILE--
+use warnings 'io' ;
+use def ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+ok5
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+sub check {
+  print "ok1\n" if !warnings::enabled('all') ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+eval { abc::check() ; };
+print $@ ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if ! warnings::enabled('all') ;
+  print "ok2\n" if   warnings::enabled("syntax") ;
+  print "ok3\n" if ! warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+eval { abc::check() ; } ;
+print $@ ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc
+package abc ;
+no warnings ;
+sub check {
+  print "ok1\n" if !warnings::enabled('all') ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+require "abc" ;
+eval { abc::check() ; } ;
+print $@ ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if !warnings::enabled('all') ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+  print "ok3\n" if warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+require "abc" ;
+eval { use warnings 'io' ; abc::check() ; };
+abc::check() ; 
+print $@ ;
+EXPECT
+ok1
+ok2
+ok3
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if ! warnings::enabled('all') ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if ! warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+sub fred { abc::check() }
+fred() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+sub check {
+  print "ok1\n" if  ! warnings::enabled('all') ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+sub fred { no warnings ; abc::check() }
+fred() ;
+EXPECT
+ok1
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+sub check {
+  print "ok1\n" if  ! warnings::enabled('all') ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if  warnings::enabled("io") ;
+  print "ok4\n" if  ! warnings::enabled("misc") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+sub fred { use warnings 'io'  ; abc::check() }
+fred() ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+########
+
+# check warnings::warn
+use warnings ;
+eval { warnings::warn() } ;
+print $@ ;
+eval { warnings::warn("fred", "joe") } ;
+print $@ ;
+EXPECT
+Usage: warnings::warn([category,] 'message') at - line 4
+unknown warnings category 'fred' at - line 6
+########
+
+# check warnings::warnif
+use warnings ;
+eval { warnings::warnif() } ;
+print $@ ;
+eval { warnings::warnif("fred", "joe") } ;
+print $@ ;
+EXPECT
+Usage: warnings::warnif([category,] 'message') at - line 4
+unknown warnings category 'fred' at - line 6
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+sub check { warnings::warn("io", "hello") }
+1;
+--FILE--
+use warnings "io" ;
+use abc;
+abc::check() ;
+EXPECT
+hello at - line 3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+sub check { warnings::warn("misc", "hello") }
+1;
+--FILE--
+use warnings "io" ;
+use abc;
+abc::check() ;
+EXPECT
+hello at - line 3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+sub check { warnings::warn("io", "hello") }
+1;
+--FILE--
+use warnings qw( FATAL deprecated ) ;
+use abc;
+eval { abc::check() ; } ;
+print "[[$@]]\n";
+EXPECT
+hello at - line 3
+	eval {...} called at - line 3
+[[]]
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+sub check { warnings::warn("io", "hello") }
+1;
+--FILE--
+use warnings qw( FATAL io ) ;
+use abc;
+eval { abc::check() ; } ;
+print "[[$@]]\n";
+EXPECT
+[[hello at - line 3
+	eval {...} called at - line 3
+]]
+########
+-W
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+print "ok1\n" if warnings::enabled("io") ;
+print "ok2\n" if warnings::enabled("all") ;
+1;
+--FILE-- 
+no warnings;
+use abc ;
+EXPECT
+ok1
+ok2
+########
+-X
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+print "ok1\n" if !warnings::enabled("io") ;
+print "ok2\n" if !warnings::enabled("all") ;
+1;
+--FILE-- 
+use warnings;
+use abc ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+sub check {
+  print "ok\n" if ! warnings::enabled() ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+package 'abc' not registered for warnings at abc.pm line 4
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+sub check {
+  warnings::warn("fred") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+package 'abc' not registered for warnings at abc.pm line 4
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+sub check {
+  warnings::warnif("fred") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+package 'abc' not registered for warnings at abc.pm line 4
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if  warnings::enabled ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if !warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+use warnings 'abc' ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if !warnings::enabled ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if !warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if warnings::enabled ;
+  print "ok2\n" if warnings::enabled("syntax") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+use warnings 'abc' ;
+eval { abc::check() ; };
+print $@ ;
+EXPECT
+ok1
+ok2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if !warnings::enabled ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if !warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+eval { abc::check() ; } ;
+print $@ ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if  warnings::enabled ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if !warnings::enabled("io") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+use warnings 'abc' ;
+sub fred { abc::check() }
+fred() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'io' ;
+use warnings::register ;
+sub check {
+  print "ok1\n" if  ! warnings::enabled ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+sub fred { no warnings ; abc::check() }
+fred() ;
+EXPECT
+ok1
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+use warnings::register;
+sub check {
+  print "ok1\n" if  warnings::enabled ;
+  print "ok2\n" if  warnings::enabled("syntax") ;
+  print "ok3\n" if  warnings::enabled("io") ;
+  print "ok4\n" if  ! warnings::enabled("misc") ;
+}
+1;
+--FILE-- 
+use warnings 'syntax' ;
+use abc ;
+use warnings 'abc' ;
+sub fred { use warnings 'io'  ; abc::check() }
+fred() ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings 'misc' ;
+use warnings::register;
+sub check { warnings::warn("hello") }
+1;
+--FILE--
+use abc;
+use warnings "abc" ;
+abc::check() ;
+EXPECT
+hello at - line 3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings::register;
+sub check { warnings::warn("hello") }
+1;
+--FILE--
+use abc;
+abc::check() ;
+EXPECT
+hello at - line 2
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings::register ;
+sub check { warnings::warn("hello") }
+1;
+--FILE--
+use abc;
+use warnings qw( FATAL deprecated ) ;
+eval { abc::check() ; } ;
+print "[[$@]]\n";
+EXPECT
+hello at - line 3
+	eval {...} called at - line 3
+[[]]
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings::register ;
+sub check { warnings::warn("hello") }
+1;
+--FILE--
+use abc;
+use warnings qw( FATAL abc ) ;
+eval { abc::check() ; } ;
+print "[[$@]]\n";
+EXPECT
+[[hello at - line 3
+	eval {...} called at - line 3
+]]
+########
+-W
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if warnings::enabled() ;
+  print "ok2\n" if warnings::enabled("io") ;
+  print "ok3\n" if warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+no warnings;
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+-X
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+no warnings;
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if warnings::enabled() ;
+  print "ok2\n" if warnings::enabled("io") ;
+  print "ok3\n" if warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+use warnings 'all';
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+use abc ;
+no warnings ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  warnings::warnif("my message 1") ;
+  warnings::warnif('abc', "my message 2") ;
+  warnings::warnif('io', "my message 3") ;
+  warnings::warnif('all', "my message 4") ;
+}
+1;
+--FILE-- 
+use abc ;
+use warnings 'abc';
+no warnings ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "abc self" . (warnings::enabled() ? "" : " not") . " enabled\n" ;
+  print "abc def"  . (warnings::enabled('def') ? "" : " not") . " enabled\n" ;
+  print "abc all"  . (warnings::enabled('all') ? "" : " not") . " enabled\n" ;
+}
+1;
+--FILE-- def.pm
+package def ;
+use warnings "io" ;
+use warnings::register ;
+sub check { 
+  print "def self" . (warnings::enabled() ? "" : " not") . " enabled\n" ;
+  print "def abc"  . (warnings::enabled('abc') ? "" : " not") . " enabled\n" ;
+  print "def all"  . (warnings::enabled('all') ? "" : " not") . " enabled\n" ;
+}
+1;
+--FILE-- 
+use abc ;
+use def ;
+use warnings 'abc';
+abc::check() ;
+def::check() ;
+no warnings 'abc'  ;
+use warnings 'def'  ;
+abc::check() ;
+def::check() ;
+use warnings 'abc'  ;
+use warnings 'def'  ;
+abc::check() ;
+def::check() ;
+no warnings 'abc'  ;
+no warnings 'def'  ;
+abc::check() ;
+def::check() ;
+use warnings;
+abc::check() ;
+def::check() ;
+no warnings 'abc' ;
+abc::check() ;
+def::check() ;
+EXPECT
+abc self enabled
+abc def not enabled
+abc all not enabled
+def self not enabled
+def abc enabled
+def all not enabled
+abc self not enabled
+abc def enabled
+abc all not enabled
+def self enabled
+def abc not enabled
+def all not enabled
+abc self enabled
+abc def enabled
+abc all not enabled
+def self enabled
+def abc enabled
+def all not enabled
+abc self not enabled
+abc def not enabled
+abc all not enabled
+def self not enabled
+def abc not enabled
+def all not enabled
+abc self enabled
+abc def enabled
+abc all enabled
+def self enabled
+def abc enabled
+def all enabled
+abc self not enabled
+abc def enabled
+abc all not enabled
+def self enabled
+def abc not enabled
+def all not enabled
+########
+-w
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if warnings::enabled() ;
+  print "ok2\n" if warnings::enabled("io") ;
+  print "ok3\n" if warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+use abc ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+-w
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+use abc ;
+use warnings 'abc';
+no warnings ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  warnings::warnif("my message 1") ;
+  warnings::warnif('abc', "my message 2") ;
+  warnings::warnif('io', "my message 3") ;
+  warnings::warnif('all', "my message 4") ;
+}
+1;
+--FILE-- 
+use abc ;
+use warnings 'abc';
+no warnings ;
+BEGIN { $^W = 1 ; }
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+}
+1;
+--FILE-- 
+use abc ;
+use warnings 'abc';
+no warnings ;
+$^W = 1 ;
+abc::check() ;
+EXPECT
+ok1
+ok2
+ok3
+########
+
+--FILE-- abc.pm
+$| = 1;
+package abc ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if  warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  print "ok4\n" if  warnings::enabled("abc") ;
+  warnings::warn("my message 1") ;
+  warnings::warnif("my message 2") ;
+  warnings::warnif('abc', "my message 3") ;
+  warnings::warnif('io', "my message 4") ;
+  warnings::warnif('all', "my message 5") ;
+}
+sub in2 { no warnings ; check() }
+sub in1 { no warnings ; in2() }
+1;
+--FILE-- 
+use abc ;
+use warnings 'abc';
+abc::in1() ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+my message 1 at - line 3
+my message 2 at - line 3
+my message 3 at - line 3
+########
+
+--FILE-- def.pm
+package def ;
+no warnings ;
+use warnings::register ;
+sub check { 
+  print "ok1\n" if  warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  print "ok4\n" if  warnings::enabled("def") ;
+  warnings::warn("my message 1") ;
+  warnings::warnif("my message 2") ;
+  warnings::warnif('def', "my message 3") ;
+  warnings::warnif('io', "my message 4") ;
+  warnings::warnif('all', "my message 5") ;
+}
+sub in2 { no warnings ; check() }
+sub in1 { no warnings ; in2() }
+1;
+--FILE-- abc.pm
+$| = 1;
+package abc ;
+use def ;
+use warnings 'def';
+sub in1 { def::in1() ; }
+1;
+--FILE-- 
+use abc ;
+no warnings;
+abc::in1() ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+my message 1 at abc.pm line 5
+	abc::in1() called at - line 3
+my message 2 at abc.pm line 5
+	abc::in1() called at - line 3
+my message 3 at abc.pm line 5
+	abc::in1() called at - line 3
+########
+
+--FILE-- def.pm
+$| = 1;
+package def ;
+no warnings ;
+use warnings::register ;
+require Exporter;
+@ISA = qw( Exporter ) ;
+@EXPORT = qw( in1 ) ;
+sub check { 
+  print "ok1\n" if  warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  print "ok4\n" if  warnings::enabled("abc") ;
+  print "ok5\n" if !warnings::enabled("def") ;
+  warnings::warn("my message 1") ;
+  warnings::warnif("my message 2") ;
+  warnings::warnif('abc', "my message 3") ;
+  warnings::warnif('def', "my message 4") ;
+  warnings::warnif('io', "my message 5") ;
+  warnings::warnif('all', "my message 6") ;
+}
+sub in2 { no warnings ; check() }
+sub in1 { no warnings ; in2() }
+1;
+--FILE-- abc.pm
+package abc ;
+use warnings::register ;
+use def ;
+#@ISA = qw(def) ;
+1;
+--FILE-- 
+use abc ;
+no warnings;
+use warnings 'abc';
+abc::in1() ;
+EXPECT
+ok2
+ok3
+ok4
+ok5
+my message 1 at - line 4
+my message 3 at - line 4
+########
+
+--FILE-- def.pm
+package def ;
+no warnings ;
+use warnings::register ;
+
+sub new
+{
+    my $class = shift ;
+    bless [], $class ;
+}
+
+sub check 
+{ 
+  my $self = shift ;
+  print "ok1\n" if !warnings::enabled() ;
+  print "ok2\n" if !warnings::enabled("io") ;
+  print "ok3\n" if !warnings::enabled("all") ;
+  print "ok4\n" if  warnings::enabled("abc") ;
+  print "ok5\n" if !warnings::enabled("def") ;
+  print "ok6\n" if  warnings::enabled($self) ;
+
+  warnings::warn("my message 1") ;
+  warnings::warn($self, "my message 2") ;
+
+  warnings::warnif("my message 3") ;
+  warnings::warnif('abc', "my message 4") ;
+  warnings::warnif('def', "my message 5") ;
+  warnings::warnif('io', "my message 6") ;
+  warnings::warnif('all', "my message 7") ;
+  warnings::warnif($self, "my message 8") ;
+}
+sub in2 
+{
+  no warnings ; 
+  my $self = shift ;
+  $self->check() ;
+}
+sub in1 
+{ 
+  no warnings ;
+  my $self = shift ;
+  $self->in2();
+}
+1;
+--FILE-- abc.pm
+$| = 1;
+package abc ;
+use warnings::register ;
+use def ;
+@ISA = qw(def) ;
+sub new
+{
+    my $class = shift ;
+    bless [], $class ;
+}
+
+1;
+--FILE-- 
+use abc ;
+no warnings;
+use warnings 'abc';
+$a = new abc ;
+$a->in1() ;
+print "**\n";
+$b = new def ;
+$b->in1() ;
+EXPECT
+ok1
+ok2
+ok3
+ok4
+ok5
+ok6
+my message 1 at - line 5
+my message 2 at - line 5
+my message 4 at - line 5
+my message 8 at - line 5
+**
+ok1
+ok2
+ok3
+ok4
+ok5
+my message 1 at - line 8
+my message 2 at - line 8
+my message 4 at - line 8