fix C<$1 .. $2> coredump under debugger

p4raw-id: //depot/perl@1574

1 files changed, 1 insertions, 0 deletions

diff --git a/pp_ctl.c b/pp_ctl.c
index c78187092e..5a4dcf4a4e 100644
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -856,6 +856,7 @@ PP(pp_flop)
 	    char *tmps = SvPV(final, len);
 
 	    sv = sv_mortalcopy(left);
+	    SvPV_force(sv,na);
 	    while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
 		XPUSHs(sv);
 	        if (strEQ(SvPVX(sv),tmps))