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Bug: overlapping assignments

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ISO C forbids assignment of a union field to another field of the same
union.
This commit is contained in:
Roberto Ierusalimschy 2024-06-12 15:56:13 -03:00
parent bb7bb5944c
commit d51022bf9e
1 changed files with 4 additions and 2 deletions
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6
lcode.c
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@ -776,7 +776,8 @@ void luaK_dischargevars (FuncState *fs, expdesc *e) {
break;
}
case VLOCAL: { /* already in a register */
e->u.info = e->u.var.ridx;
int temp = e->u.var.ridx;
e->u.info = temp; /* (can't do a direct assignment; values overlap) */
e->k = VNONRELOC; /* becomes a non-relocatable value */
break;
}
@ -1283,8 +1284,9 @@ void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
if (t->k == VUPVAL && !isKstr(fs, k)) /* upvalue indexed by non 'Kstr'? */
luaK_exp2anyreg(fs, t); /* put it in a register */
if (t->k == VUPVAL) {
int temp = t->u.info; /* upvalue index */
lua_assert(isKstr(fs, k));
t->u.ind.t = t->u.info; /* upvalue index */
t->u.ind.t = temp; /* (can't do a direct assignment; values overlap) */
t->u.ind.idx = k->u.info; /* literal short string */
t->k = VINDEXUP;
}