FIx issue 261: throw exception if index if idnexed oeprators if lists Array and GrowableArray is ...

runtime/lib/array.cc

Index: runtime/lib/array.cc
===================================================================
--- runtime/lib/array.cc	(revision 957)
+++ runtime/lib/array.cc	(working copy)
@@ -64,7 +64,14 @@
 
 DEFINE_NATIVE_ENTRY(ObjectArray_setIndexed, 3) {
   const Array& array = Array::CheckedHandle(arguments->At(0));
-  const Smi& index = Smi::CheckedHandle(arguments->At(1));
+  const Instance& index_instance = Instance::CheckedHandle(arguments->At(1));
+  if (!index_instance.IsSmi()) {
+    GrowableArray<const Object*> args;
+    args.Add(&index_instance);
+    Exceptions::ThrowByType(Exceptions::kIllegalArgument, args);
+  }
+  Smi& index = Smi::Handle();
+  index ^= index_instance.raw();
   const Instance& value = Instance::CheckedHandle(arguments->At(2));
   if (array.IsNull() || index.IsNull()) {
     // TODO(asiva): Need to handle error cases.