Downgrade "Wide character in print" to a warning.

p4raw-id: //depot/perlio@9549

2 files changed, 8 insertions, 4 deletions

diff --git a/doio.c b/doio.c
index f6566bb521..631149db41 100644
--- a/doio.c
+++ b/doio.c
@@ -1204,8 +1204,11 @@ Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
 	    if (!SvUTF8(sv))
 		sv_utf8_upgrade(sv = sv_mortalcopy(sv));
 	}
-	else if (DO_UTF8(sv))
-	    sv_utf8_downgrade((sv = sv_mortalcopy(sv)), FALSE);
+	else if (DO_UTF8(sv)) {
+	    if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)) {
+		Perl_warner(aTHX_ WARN_UTF8, "Wide character in print");
+	    }
+	}
 	tmps = SvPV(sv, len);
 	break;
     }
diff --git a/t/io/utf8.t b/t/io/utf8.t
index 52b641d2f1..ac5cde7a6e 100755
--- a/t/io/utf8.t
+++ b/t/io/utf8.t
@@ -135,8 +135,9 @@ print "ok 21\n";
 
 # Now let's make it suffer.
 open F, ">", "a" or die $!;
-eval { print F $a; };
-print "not " unless $@ and $@ =~ /Wide character in print/i;
+my $w;
+eval {local $SIG{__WARN__} = sub { $w = $_[0] };  print F $a; };
+print "not " if ($@ || $w !~ /Wide character in print/i);
 print "ok 22\n";
 }