--- lua-5.1.4/src/lcode.c	2007/12/28 15:32:23	2.25.1.3
+++ lua-5.1.4/src/lcode.c	2011/01/31 14:53:16	2.25.1.5
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 2.25.1.3 2007/12/28 15:32:23 roberto Exp $
+** $Id: lcode.c,v 2.25.1.5 2011/01/31 14:53:16 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -544,10 +544,6 @@
       pc = NO_JUMP;  /* always true; do nothing */
       break;
     }
-    case VFALSE: {
-      pc = luaK_jump(fs);  /* always jump */
-      break;
-    }
     case VJMP: {
       invertjump(fs, e);
       pc = e->u.s.info;
@@ -572,10 +568,6 @@
       pc = NO_JUMP;  /* always false; do nothing */
       break;
     }
-    case VTRUE: {
-      pc = luaK_jump(fs);  /* always jump */
-      break;
-    }
     case VJMP: {
       pc = e->u.s.info;
       break;
--- lua-5.1.4/src/ldblib.c	2008/01/21 13:11:21	1.104.1.3
+++ lua-5.1.4/src/ldblib.c	2009/08/04 18:50:18	1.104.1.4
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.104.1.3 2008/01/21 13:11:21 roberto Exp $
+** $Id: ldblib.c,v 1.104.1.4 2009/08/04 18:50:18 roberto Exp $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -45,6 +45,7 @@
 
 
 static int db_getfenv (lua_State *L) {
+  luaL_checkany(L, 1);
   lua_getfenv(L, 1);
   return 1;
 }
--- lua-5.1.4/src/liolib.c	2008/01/18 17:47:43	2.73.1.3
+++ lua-5.1.4/src/liolib.c	2010/05/14 15:33:51	2.73.1.4
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.73.1.3 2008/01/18 17:47:43 roberto Exp $
+** $Id: liolib.c,v 2.73.1.4 2010/05/14 15:33:51 roberto Exp $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -276,7 +276,10 @@
     lua_pushnumber(L, d);
     return 1;
   }
-  else return 0;  /* read fails */
+  else {
+    lua_pushnil(L);  /* "result" to be removed */
+    return 0;  /* read fails */
+  }
 }
 
 
--- lua-5.1.4/src/llex.c	2007/12/27 13:02:25	2.20.1.1
+++ lua-5.1.4/src/llex.c	2009/11/23 14:58:22	2.20.1.2
@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.20.1.1 2007/12/27 13:02:25 roberto Exp $
+** $Id: llex.c,v 2.20.1.2 2009/11/23 14:58:22 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -118,8 +118,10 @@
   lua_State *L = ls->L;
   TString *ts = luaS_newlstr(L, str, l);
   TValue *o = luaH_setstr(L, ls->fs->h, ts);  /* entry for `str' */
-  if (ttisnil(o))
+  if (ttisnil(o)) {
     setbvalue(o, 1);  /* make sure `str' will not be collected */
+    luaC_checkGC(L);
+  }
   return ts;
 }
 
--- lua-5.1.4/src/loadlib.c	2008/08/06 13:29:28	1.52.1.3
+++ lua-5.1.4/src/loadlib.c	2009/09/09 13:17:16	1.52.1.4
@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.52.1.3 2008/08/06 13:29:28 roberto Exp $
+** $Id: loadlib.c,v 1.52.1.4 2009/09/09 13:17:16 roberto Exp $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -639,7 +639,7 @@
   lua_pushvalue(L, -1);
   lua_replace(L, LUA_ENVIRONINDEX);
   /* create `loaders' table */
-  lua_createtable(L, 0, sizeof(loaders)/sizeof(loaders[0]) - 1);
+  lua_createtable(L, sizeof(loaders)/sizeof(loaders[0]) - 1, 0);
   /* fill it with pre-defined loaders */
   for (i=0; loaders[i] != NULL; i++) {
     lua_pushcfunction(L, loaders[i]);
--- lua-5.1.4/src/lstrlib.c	2008/07/11 17:27:21	1.132.1.4
+++ lua-5.1.4/src/lstrlib.c	2010/05/14 15:34:19	1.132.1.5
@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c,v 1.132.1.4 2008/07/11 17:27:21 roberto Exp $
+** $Id: lstrlib.c,v 1.132.1.5 2010/05/14 15:34:19 roberto Exp $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -754,6 +754,7 @@
 
 
 static int str_format (lua_State *L) {
+  int top = lua_gettop(L);
   int arg = 1;
   size_t sfl;
   const char *strfrmt = luaL_checklstring(L, arg, &sfl);
@@ -768,7 +769,8 @@
     else { /* format item */
       char form[MAX_FORMAT];  /* to store the format (`%...') */
       char buff[MAX_ITEM];  /* to store the formatted item */
-      arg++;
+      if (++arg > top)
+        luaL_argerror(L, arg, "no value");
       strfrmt = scanformat(L, strfrmt, form);
       switch (*strfrmt++) {
         case 'c': {
--- lua-5.1.4/src/lvm.c	2007/12/28 15:32:23	2.63.1.3
+++ lua-5.1.4/src/lvm.c	2009/07/01 21:10:33	2.63.1.4
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 2.63.1.3 2007/12/28 15:32:23 roberto Exp $
+** $Id: lvm.c,v 2.63.1.4 2009/07/01 21:10:33 roberto Exp $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -133,6 +133,7 @@
 
 void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
   int loop;
+  TValue temp;
   for (loop = 0; loop < MAXTAGLOOP; loop++) {
     const TValue *tm;
     if (ttistable(t)) {  /* `t' is a table? */
@@ -152,7 +153,9 @@
       callTM(L, tm, t, key, val);
       return;
     }
-    t = tm;  /* else repeat with `tm' */ 
+    /* else repeat with `tm' */
+    setobj(L, &temp, tm);  /* avoid pointing inside table (may rehash) */
+    t = &temp;
   }
   luaG_runerror(L, "loop in settable");
 }