diff --git a/client/deps/liblua/ldblib.c b/client/deps/liblua/ldblib.c
index aed9708fe..4d1b437bf 100644
--- a/client/deps/liblua/ldblib.c
+++ b/client/deps/liblua/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.132 2012/01/19 20:14:44 roberto Exp $
+** $Id: ldblib.c,v 1.132.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -20,6 +20,10 @@
 
 #define HOOKKEY "_HKEY"
 
+static void checkstack (lua_State *L, lua_State *L1, int n) {
+  if (L != L1 && !lua_checkstack(L1, n))
+    luaL_error(L, "stack overflow");
+}
 
 
 static int db_getregistry(lua_State *L) {
@@ -112,6 +116,7 @@ static int db_getinfo(lua_State *L) {
     int arg;
     lua_State *L1 = getthread(L, &arg);
     const char *options = luaL_optstring(L, arg + 2, "flnStu");
+    checkstack(L, L1, 3);
     if (lua_isnumber(L, arg + 1)) {
         if (!lua_getstack(L1, (int)lua_tointeger(L, arg + 1), &ar)) {
             lua_pushnil(L);  /* level out of range */
@@ -168,6 +173,7 @@ static int db_getlocal(lua_State *L) {
     } else { /* stack-level argument */
         if (!lua_getstack(L1, luaL_checkint(L, arg + 1), &ar)) /* out of range? */
             return luaL_argerror(L, arg + 1, "level out of range");
+        checkstack(L, L1, 1);
         name = lua_getlocal(L1, &ar, nvar);
         if (name) {
             lua_xmove(L1, L, 1);  /* push local value */
@@ -190,6 +196,7 @@ static int db_setlocal(lua_State *L) {
         return luaL_argerror(L, arg + 1, "level out of range");
     luaL_checkany(L, arg + 3);
     lua_settop(L, arg + 3);
+    checkstack(L, L1, 1);
     lua_xmove(L, L1, 1);
     lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg + 2)));
     return 1;
@@ -309,6 +316,7 @@ static int db_sethook(lua_State *L) {
         lua_pushvalue(L, -1);
         lua_setmetatable(L, -2);  /* setmetatable(hooktable) = hooktable */
     }
+    checkstack(L, L1, 1);
     lua_pushthread(L1);
     lua_xmove(L1, L, 1);
     lua_pushvalue(L, arg + 1);
@@ -328,6 +336,7 @@ static int db_gethook(lua_State *L) {
         lua_pushliteral(L, "external hook");
     else {
         gethooktable(L);
+        checkstack(L, L1, 1);
         lua_pushthread(L1);
         lua_xmove(L1, L, 1);
         lua_rawget(L, -2);   /* get hook */