MIPS: Ensure that all descriptors have a valid enumeration index, and replace NextEnumIndex with La…

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 9ae025d7b2ac4ec6d8e8404da1c1ba3ff1d8a0bc..246fe2a13f2a9a8b4f8de9b624070ef37b46b1ff 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -1149,7 +1149,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   // We got a map in register v0. Get the enumeration cache from it.
   __ bind(&use_cache);
   __ LoadInstanceDescriptors(v0, a1, a2);
-  __ lw(a1, FieldMemOperand(a1, DescriptorArray::kEnumerationIndexOffset));
+  __ lw(a1, FieldMemOperand(a1, DescriptorArray::kLastAddedOffset));
   __ lw(a2, FieldMemOperand(a1, DescriptorArray::kEnumCacheBridgeCacheOffset));
 
   // Set up the four remaining stack slots.