Larry's patch to disallow CORE::Snark, with perldiag entry

p4raw-id: //depot/perl@5671

1 files changed, 2 insertions, 1 deletions

diff --git a/toke.c b/toke.c
index 2e6120d731..817747630c 100644
--- a/toke.c
+++ b/toke.c
@@ -3958,7 +3958,8 @@ Perl_yylex(pTHX)
 		s += 2;
 		d = s;
 		s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
-		tmp = keyword(PL_tokenbuf, len);
+		if (!(tmp = keyword(PL_tokenbuf, len)))
+		    Perl_croak(aTHX_ "CORE::%s is not a keyword", PL_tokenbuf);
 		if (tmp < 0)
 		    tmp = -tmp;
 		goto reserved_word;