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'luaD_tryfuncTM' can ensure it does not change the stack

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Roberto Ierusalimschy
2018-01-10 17:19:27 -02:00
parent 728ff94595
commit ab0a851db4
3 changed files with 8 additions and 13 deletions
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6
lvm.c
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@@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 2.331 2017/12/30 20:46:18 roberto Exp roberto $
** $Id: lvm.c,v 2.332 2018/01/09 14:23:40 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -1501,9 +1501,7 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
b = L->top - ra;
lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
if (!ttisfunction(vra)) { /* not a function? */
/* try to get '__call' metamethod */
ProtectNT(ra = luaD_tryfuncTM(L, ra));
vra = s2v(ra);
ProtectNT(luaD_tryfuncTM(L, ra)); /* try '__call' metamethod */
b++; /* there is now one extra argument */
}
if (!ttisLclosure(vra)) { /* C function? */