Fix canonicalization of +-0.0 keys for IR_NEWREF.

Reported by Sergey Kaplun. #981

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lj_record.c b/src/lj_record.c
index dee53327..10a14a6f 100644
--- a/src/lj_record.c
+++ b/src/lj_record.c
@@ -1256,6 +1256,8 @@ TRef lj_record_idx(jit_State *J, RecordIndex *ix)
         TRef key = ix->key;
         if (tref_isinteger(key))  /* NEWREF needs a TValue as a key. */
           key = emitir(IRTN(IR_CONV), key, IRCONV_NUM_INT);
+        else if (tref_isnumber(key) && tref_isk(key) && tvismzero(&ix->keyv))
+          key = lj_ir_knum_zero(J);  /* Canonicalize -0.0 to +0.0. */
         xref = emitir(IRT(IR_NEWREF, IRT_P32), ix->tab, key);
         keybarrier = 0;  /* NEWREF already takes care of the key barrier. */
       }