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Fix precondition check for NEWREF.

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A check for nil value is not enough. Must check for ptr == niltv.
This commit is contained in:
Mike Pall 2010-03-28 03:34:18 +02:00
parent 6038866f7d
commit 69df01efb2
1 changed files with 2 additions and 2 deletions
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4
src/lj_record.c
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@ -995,10 +995,10 @@ static TRef rec_idx(jit_State *J, RecordIndex *ix)
cTValue *mo = lj_tab_getstr(mt, strref(J2G(J)->mmname[MM_newindex]));
hasmm = mo && !tvisnil(mo);
}
if (hasmm || oldv == niltvg(J2G(J)))
if (hasmm)
emitir(IRTG(loadop, IRT_NIL), xref, 0); /* Guard for nil value. */
else if (xrefop == IR_HREF)
emitir(IRTG(IR_NE, IRT_PTR), xref, lj_ir_kptr(J, niltvg(J2G(J))));
emitir(IRTG(oldv == niltvg(J2G(J)) ? IR_EQ : IR_NE, IRT_PTR), xref, lj_ir_kptr(J, niltvg(J2G(J))));
if (ix->idxchain && rec_mm_lookup(J, ix, MM_newindex)) { /* Metamethod? */
lua_assert(hasmm);
goto handlemm;