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bug (with compat on): 'ipairs' can work with any type that provides 

an __index; so, 'pairsmeta' should not check for tables. ('pairs'
already checks for tables through 'next'.)
This commit is contained in:
Roberto Ierusalimschy 2016-09-05 16:06:34 -03:00
parent aeb4c6fff1
commit dbb6f11e8e
1 changed files with 2 additions and 2 deletions
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4
lbaselib.c
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@ -1,5 +1,5 @@
/* /*
** $Id: lbaselib.c,v 1.312 2015/10/29 15:21:04 roberto Exp roberto $ ** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp roberto $
** Basic library ** Basic library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -208,8 +208,8 @@ static int luaB_type (lua_State *L) {
static int pairsmeta (lua_State *L, const char *method, int iszero, static int pairsmeta (lua_State *L, const char *method, int iszero,
lua_CFunction iter) { lua_CFunction iter) {
luaL_checkany(L, 1);
if (luaL_getmetafield(L, 1, method) == LUA_TNIL) { /* no metamethod? */ if (luaL_getmetafield(L, 1, method) == LUA_TNIL) { /* no metamethod? */
luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */
lua_pushcfunction(L, iter); /* will return generator, */ lua_pushcfunction(L, iter); /* will return generator, */
lua_pushvalue(L, 1); /* state, */ lua_pushvalue(L, 1); /* state, */
if (iszero) lua_pushinteger(L, 0); /* and initial value */ if (iszero) lua_pushinteger(L, 0); /* and initial value */