From 3a29087cb7d08a2693c9eecd82cf2ce13551e450 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 2 Jan 2015 10:52:22 -0200
Subject: 'lua_setlocal' should not pop value when failing (to be consistent
 with the manual and with 'lua_setupvalue')

---
 ldblib.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'ldblib.c')

diff --git a/ldblib.c b/ldblib.c
index c50568ae..b8164d51 100644
--- a/ldblib.c
+++ b/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.146 2014/11/10 14:27:16 roberto Exp roberto $
+** $Id: ldblib.c,v 1.147 2014/12/08 15:47:25 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -207,15 +207,20 @@ static int db_getlocal (lua_State *L) {
 
 static int db_setlocal (lua_State *L) {
   int arg;
+  const char *name;
   lua_State *L1 = getthread(L, &arg);
   lua_Debug ar;
   int level = (int)luaL_checkinteger(L, arg + 1);
+  int nvar = (int)luaL_checkinteger(L, arg + 2);
   if (!lua_getstack(L1, level, &ar))  /* out of range? */
     return luaL_argerror(L, arg+1, "level out of range");
   luaL_checkany(L, arg+3);
   lua_settop(L, arg+3);
   lua_xmove(L, L1, 1);
-  lua_pushstring(L, lua_setlocal(L1, &ar, (int)luaL_checkinteger(L, arg+2)));
+  name = lua_setlocal(L1, &ar, nvar);
+  if (name == NULL)
+    lua_pop(L1, 1);  /* pop value (if not popped by 'lua_setlocal') */
+  lua_pushstring(L, name);
   return 1;
 }
 
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