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Merge branch 'blua-urite' into 'next' 

Fix crash when trying to use bitwise NOT on true/false/nil

See merge request STJr/SRB2!1262
This commit is contained in:
James R 2020-12-10 15:03:39 -05:00
parent c841750868 5a8e653cd5
commit 8701caa110
1 changed files with 12 additions and 19 deletions
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31
src/blua/lcode.c
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@ -686,6 +686,15 @@ static void codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) {
}
static void codeunaryarith (FuncState *fs, OpCode op, expdesc *e) {
expdesc e2;
e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
if (op == OP_LEN || !isnumeral(e))
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
codearith(fs, op, e, &e2);
}
static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
expdesc *e2) {
int o1 = luaK_exp2RK(fs, e1);
@ -703,27 +712,11 @@ static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
expdesc e2;
e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
switch (op) {
case OPR_MINUS: {
if (!isnumeral(e))
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
codearith(fs, OP_UNM, e, &e2);
break;
}
case OPR_BNOT: {
if (e->k == VK)
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
codearith(fs, OP_BNOT, e, &e2);
break;
}
case OPR_MINUS: codeunaryarith(fs, OP_UNM, e); break;
case OPR_BNOT: codeunaryarith(fs, OP_BNOT, e); break;
case OPR_NOT: codenot(fs, e); break;
case OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OP_LEN, e, &e2);
break;
}
case OPR_LEN: codeunaryarith(fs, OP_LEN, e); break;
default: lua_assert(0);
}
}