make diagnostic on C<my $^I> etc., more readable

p4raw-id: //depot/perl@3627

1 files changed, 1 insertions, 1 deletions

diff --git a/op.c b/op.c
index 44700dd3e5..e1d697695a 100644
--- a/op.c
+++ b/op.c
@@ -142,7 +142,7 @@ Perl_pad_allocmy(pTHX_ char *name)
 	(PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
 	name[1] == '_' && (int)strlen(name) > 2))
     {
-	if (!isPRINT(name[1])) {
+	if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
 	    /* 1999-02-27 mjd@plover.com */
 	    char *p;
 	    p = strchr(name, '\0');