From 69dd9461e5aeb98fe9bbc71f1e81859d03ec8a34 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 28 Feb 2003 16:45:15 -0300
Subject: bug: GC metamethod calls could mess C/Lua stack syncronization

---
 lstate.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'lstate.c')

diff --git a/lstate.c b/lstate.c
index c35da871..150eb14d 100644
--- a/lstate.c
+++ b/lstate.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c,v 1.119 2003/02/10 17:32:50 roberto Exp roberto $
+** $Id: lstate.c,v 1.120 2003/02/13 16:07:57 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -206,9 +206,14 @@ static void callallgcTM (lua_State *L, void *ud) {
 LUA_API void lua_close (lua_State *L) {
   lua_lock(L);
   L = G(L)->mainthread;  /* only the main thread can be closed */
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
   luaC_separateudata(L);  /* separate udata that have GC metamethods */
-  /* repeat until no more errors */
-  while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0) /* skip */;
+  L->errfunc = 0;  /* no error function during GC metamethods */
+  do {  /* repeat until no more errors */
+    L->ci = L->base_ci;
+    L->base = L->top = L->ci->base;
+    L->nCcalls = 0;
+  } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
   lua_assert(G(L)->tmudata == NULL);
   close_state(L);
 }
-- 
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