don't try to get slot of an NULL attribute name

MoarVM · May 19, 2014 · 845bb6f · 845bb6f
1 parent 3818135
commit 845bb6f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/6model/reprs/P6opaque.c b/src/6model/reprs/P6opaque.c
@@ -1392,7 +1392,7 @@ static void spesh(MVMThreadContext *tc, MVMSTable *st, MVMSpeshGraph *g, MVMSpes
     case MVM_OP_getattrs_s: {
         MVMSpeshFacts *ch_facts = MVM_spesh_get_facts(tc, g, ins->operands[2]);
         MVMString     *name     = spesh_attr_name(tc, g, ins->operands[3], opcode == MVM_OP_getattrs_s);
-        if (ch_facts->flags & MVM_SPESH_FACT_KNOWN_TYPE && ch_facts->type) {
+        if (name && ch_facts->flags & MVM_SPESH_FACT_KNOWN_TYPE && ch_facts->type) {
             MVMint64 slot = try_get_slot(tc, repr_data, ch_facts->type, name);
             if (slot >= 0 && repr_data->flattened_stables[slot]) {
                 MVMSTable     *flat_st = repr_data->flattened_stables[slot];