From a6d636c50809b405ca838dc683627433950c9e2e Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Sat, 1 Sep 2012 00:58:00 +0200
Subject: [PATCH] Preserve snapshot #0 PC for all traces (potential gcstep
 exit).

---
 src/lj_snap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/lj_snap.c b/src/lj_snap.c
index dd123692..6fe9efee 100644
--- a/src/lj_snap.c
+++ b/src/lj_snap.c
@@ -147,8 +147,7 @@ void lj_snap_add(jit_State *J)
   /* Merge if no ins. inbetween or if requested and no guard inbetween. */
   if (J->mergesnap ? !irt_isguard(J->guardemit) :
       (nsnap > 0 && J->cur.snap[nsnap-1].ref == J->cur.nins)) {
-    if (nsnap == 1 && J->parent == 0) {
-      /* But preserve snap #0 PC for root traces. */
+    if (nsnap == 1) {  /* But preserve snap #0 PC. */
       emitir_raw(IRT(IR_NOP, IRT_NIL), 0, 0);
       goto nomerge;
     }
-- 
2.11.4.GIT