From e091a254dfe4521d837469d3ae7cc329e2df3376 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 28 Apr 2009 16:04:36 -0300
Subject: new way to GC stacks: the entire stack must be correct all the times;
 the 'dead' part of a stack (after the top) must have only nil's, so that
 'top' may go up without cleaning the stack.

---
 lstate.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'lstate.c')

diff --git a/lstate.c b/lstate.c
index 7df2ba2b..77999877 100644
--- a/lstate.c
+++ b/lstate.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c,v 2.52 2009/04/17 14:40:13 roberto Exp roberto $
+** $Id: lstate.c,v 2.53 2009/04/17 22:00:01 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -75,9 +75,12 @@ void luaE_freeCI (lua_State *L) {
 
 
 static void stack_init (lua_State *L1, lua_State *L) {
+  int i;
   /* initialize stack array */
   L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
   L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
+  for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++)
+    setnilvalue(L1->stack + i);  /* erase new stack */
   L1->top = L1->stack;
   L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
   /* initialize first ci */
-- 
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