1 files changed, 20 insertions, 5 deletions
diff --git a/t/comp/proto.t b/t/comp/proto.t
index d1cfede8af..2a4c9ccce5 100755
--- a/t/comp/proto.t
+++ b/t/comp/proto.t
@@ -16,7 +16,7 @@ BEGIN {
 
 use strict;
 
-print "1..76\n";
+print "1..80\n";
 
 my $i = 1;
 
@@ -362,20 +362,35 @@ printf "ok %d\n",$i++;
 ##
 ##
 
-testing \&an_array_ref, '\@';
+testing \&array_ref_plus, '\@@';
 
-sub an_array_ref (\@) {
+sub array_ref_plus (\@@) {
     print "# \@_ = (",join(",",@_),")\n";
-    print "not " unless ref($_[0]) && 1 == @{$_[0]};
+    print "not " unless @_ == 2 && ref($_[0]) && 1 == @{$_[0]} && $_[1] eq 'x';
     printf "ok %d\n",$i++;
     @{$_[0]} = (qw(ok)," ",$i++,"\n");
 }
 
 @array = ('a');
-an_array_ref @array;
+{ my @more = ('x');
+  array_ref_plus @array, @more; }
 print "not " unless @array == 4;
 print @array;
 
+my $p;
+print "not " if defined prototype('CORE::print');
+print "ok ", $i++, "\n";
+
+print "not " if defined prototype('CORE::system');
+print "ok ", $i++, "\n";
+
+print "# CORE::open => ($p)\nnot " if ($p = prototype('CORE::open')) ne '*;$';
+print "ok ", $i++, "\n";
+
+print "# CORE:Foo => ($p), \$@ => `$@'\nnot " 
+    if defined ($p = eval { prototype('CORE::Foo') or 1 }) or $@ !~ /^Cannot find an opnumber/;
+print "ok ", $i++, "\n";
+
 # correctly note too-short parameter lists that don't end with '$',
 #  a possible regression.