Fix: KeyedStoreGeneric must check for writable array length

src/builtins/builtins-array.cc

Index: src/builtins/builtins-array.cc
diff --git a/src/builtins/builtins-array.cc b/src/builtins/builtins-array.cc
index 22953106608b23822d16ebd23840d52a343d4e45..582bd41d222bcd223a459cdbcc98f89be7e3c7aa 100644
--- a/src/builtins/builtins-array.cc
+++ b/src/builtins/builtins-array.cc
@@ -239,7 +239,7 @@ void Builtins::Generate_FastArrayPush(compiler::CodeAssemblerState* state) {
     Node* descriptors = assembler.LoadMapDescriptors(map);
     Node* details = assembler.LoadFixedArrayElement(
         descriptors, DescriptorArray::ToDetailsIndex(0));
-    mask = READ_ONLY << PropertyDetails::AttributesField::kShift;
+    mask = PropertyDetails::kAttributesReadOnlyMask;
     Node* mask_node = assembler.SmiConstant(mask);
     test = assembler.SmiAnd(details, mask_node);
     assembler.GotoIf(assembler.WordEqual(test, mask_node), &runtime);