Move all code that relies on reading the to-be-thrown-away buffer ahead

of the call to sv_chop() that throws it away.

p4raw-id: //depot/perl@32777

2 files changed, 2 insertions, 6 deletions

diff --git a/pp_hot.c b/pp_hot.c
index f987357bf8..c6b5c5c097 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -2197,10 +2197,8 @@ PP(pp_subst)
 	    else if ((i = m - s)) {	/* faster from front */
 		d -= clen;
 		m = d;
+		Move(s, d - i, i, char);
 		sv_chop(TARG, d-i);
-		s += i;
-		while (i--)
-		    *--d = *--s;
 		if (clen)
 		    Copy(c, m, clen, char);
 	    }
diff --git a/sv.c b/sv.c
index 913a5daf30..bb64eb9621 100644
--- a/sv.c
+++ b/sv.c
@@ -4994,10 +4994,8 @@ Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, const char *little,
     else if ((i = mid - big)) {	/* faster from front */
 	midend -= littlelen;
 	mid = midend;
+	Move(big, midend - i, i, char);
 	sv_chop(bigstr,midend-i);
-	big += i;
-	while (i--)
-	    *--midend = *--big;
 	if (littlelen)
 	    Move(little, mid, littlelen,char);
     }