From 2715fe3aee7c8202b4b5d04748d1c5faa6d8fd9c Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Tue, 22 Apr 2014 11:26:52 +0200
Subject: [PATCH] Prevent GC estimate miscalculation due to buffer growth.

---
 src/lj_gc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lj_gc.c b/src/lj_gc.c
index c2bc397d..c856df4d 100644
--- a/src/lj_gc.c
+++ b/src/lj_gc.c
@@ -631,6 +631,8 @@ static size_t gc_onestep(lua_State *L)
   case GCSsweep: {
     MSize old = g->gc.total;
     setmref(g->gc.sweep, gc_sweep(g, mref(g->gc.sweep, GCRef), GCSWEEPMAX));
+    lua_assert(old >= g->gc.total);
+    g->gc.estimate -= old - g->gc.total;
     if (gcref(*mref(g->gc.sweep, GCRef)) == NULL) {
       gc_shrink(g, L);
       if (gcref(g->gc.mmudata)) {  /* Need any finalizations? */
@@ -643,8 +645,6 @@ static size_t gc_onestep(lua_State *L)
 	g->gc.debt = 0;
       }
     }
-    lua_assert(old >= g->gc.total);
-    g->gc.estimate -= old - g->gc.total;
     return GCSWEEPMAX*GCSWEEPCOST;
     }
   case GCSfinalize: