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explicit test for common error (due to compatibility issue)

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Roberto Ierusalimschy
2006-06-07 09:37:17 -03:00
parent a62fca1ebb
commit fad7582c9a
1 changed files with 4 additions and 1 deletions
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5
lapi.c
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@@ -1,5 +1,5 @@
/* /*
** $Id: lapi.c,v 2.53 2006/01/10 12:50:00 roberto Exp roberto $ ** $Id: lapi.c,v 2.54 2006/06/02 15:34:00 roberto Exp roberto $
** Lua API ** Lua API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@@ -199,6 +199,9 @@ LUA_API void lua_insert (lua_State *L, int idx) {
LUA_API void lua_replace (lua_State *L, int idx) { LUA_API void lua_replace (lua_State *L, int idx) {
StkId o; StkId o;
lua_lock(L); lua_lock(L);
/* explicit test for incompatible code */
if (idx == LUA_ENVIRONINDEX && L->ci == L->base_ci)
luaG_runerror(L, "no calling environment");
api_checknelems(L, 1); api_checknelems(L, 1);
o = index2adr(L, idx); o = index2adr(L, idx);
api_checkvalidindex(L, o); api_checkvalidindex(L, o);