1 files changed, 22 insertions, 1 deletions
diff --git a/t/op/magic.t b/t/op/magic.t
index c2a82115b4..d71d6b299c 100755
--- a/t/op/magic.t
+++ b/t/op/magic.t
@@ -27,7 +27,7 @@ $Is_os2   = $^O eq 'os2';
 $Is_Cygwin   = $^O eq 'cygwin';
 $PERL = ($Is_MSWin32 ? '.\perl' : './perl');
 
-print "1..35\n";
+print "1..38\n";
 
 eval '$ENV{"FOO"} = "hi there";';	# check that ENV is inited inside eval
 if ($Is_MSWin32) { ok 1, `cmd /x /c set FOO` eq "FOO=hi there\n"; }
@@ -226,3 +226,24 @@ else {
     ok "34 # skipped: no caseless %ENV support",1;
     ok "35 # skipped: no caseless %ENV support",1;
 }
+
+# Make sure Errno hasn't been prematurely autoloaded
+
+ok 36, !defined %Errno::;
+
+# Test auto-loading of Errno when %! is used
+
+ok 37, scalar eval q{
+   my $errs = %!;
+   defined %Errno::;
+}, $@;
+
+
+# Make sure that Errno loading doesn't clobber $!
+
+undef %Errno::;
+delete $INC{"Errno.pm"};
+
+open(FOO, "nonesuch"); # Generate ENOENT
+my %errs = %{"!"}; # Cause Errno.pm to be loaded at run-time
+ok 38, ${"!"}{ENOENT};