Fix leak when issuing new warning implemented by #33305

p4raw-id: //depot/perl@33308

1 files changed, 1 insertions, 1 deletions

diff --git a/op.c b/op.c
index 2c03377230..ab5041fb9e 100644
--- a/op.c
+++ b/op.c
@@ -1075,7 +1075,7 @@ Perl_scalarvoid(pTHX_ OP *o)
 	    no_bareword_allowed(o);
 	else {
 	    if (ckWARN(WARN_VOID)) {
-		SV* msv = Perl_newSVpvf(aTHX_ "a constant (%"SVf")", sv);
+		SV* msv = sv_2mortal(Perl_newSVpvf(aTHX_ "a constant (%"SVf")", sv));
 		useless = SvPV_nolen(msv);
 		if (o->op_private & OPpCONST_ARYBASE)
 		    useless = NULL;