Make a temporary copy of the input buffer in pp_send, so that send

and syswrite don't gratuitously upgrade their input to UTF8

p4raw-id: //depot/perl@22471

1 files changed, 25 insertions, 1 deletions

diff --git a/t/op/sysio.t b/t/op/sysio.t
index 473a3f0883..435be12efb 100755
--- a/t/op/sysio.t
+++ b/t/op/sysio.t
@@ -1,8 +1,9 @@
 #!./perl
 
-print "1..39\n";
+print "1..42\n";
 
 chdir('op') || chdir('t/op') || die "sysio.t: cannot look for myself: $!";
+@INC = '../../lib';
 
 open(I, 'sysio.t') || die "sysio.t: cannot find myself: $!";
 
@@ -213,6 +214,29 @@ close(I);
 
 unlink $outfile;
 
+# Check that utf8 IO doesn't upgrade the scalar
+open(I, ">$outfile") || die "sysio.t: cannot write $outfile: $!";
+# Will skip harmlessly on stdioperl
+eval {binmode STDOUT, ":utf8"};
+die $@ if $@ and $@ !~ /^IO layers \(like ':utf8'\) unavailable/;
+
+# y diaresis is \w when UTF8
+$a = chr 255;
+
+print $a =~ /\w/ ? "not ok 40\n" : "ok 40\n";
+
+syswrite I, $a;
+
+# Should not be upgraded as a side effect of syswrite.
+print $a =~ /\w/ ? "not ok 41\n" : "ok 41\n";
+
+# This should work
+eval {syswrite I, 2;};
+print $@ eq "" ? "ok 42\n" : "not ok 42 # $@";
+
+close(I);
+unlink $outfile;
+
 chdir('..');
 
 1;