Avoid stomping off the beginning of an array in tr///.

p4raw-id: //depot/perl@9164

1 files changed, 2 insertions, 5 deletions

diff --git a/op.c b/op.c
index 421dc9e69d..64914ea309 100644
--- a/op.c
+++ b/op.c
@@ -2872,11 +2872,8 @@ Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
 		}
 	    }
 	}
-	if (!del) {
-	    if (j >= rlen)
-		j = rlen - 1;
-	    else
-		cPVOPo->op_pv = (char*)Renew(tbl, 0x101+rlen-j, short);
+	if (!del && rlen >= j) {
+	    cPVOPo->op_pv = (char*)Renew(tbl, 0x101+rlen-j, short);
 	    tbl[0x100] = rlen - j;
 	    for (i=0; i < rlen - j; i++)
 		tbl[0x101+i] = r[j+i];