Fix for issue 2124 - Dart VM crashes on windows

vm/object.cc

Index: vm/object.cc
===================================================================
--- vm/object.cc	(revision 5548)
+++ vm/object.cc	(working copy)
@@ -8326,20 +8326,21 @@
     if (leftover_size >= Array::InstanceSize(0)) {
       // As we have enough space to use an array object, update the leftover
       // space as an Array object.
-      new_array.raw_ = reinterpret_cast<RawArray*>(RawObject::FromAddr(addr));
-      new_array.raw_ptr()->class_ = isolate->object_store()->array_class();
+      RawArray* raw = reinterpret_cast<RawArray*>(RawObject::FromAddr(addr));
+      raw->ptr()->class_ = isolate->object_store()->array_class();
       tags = RawObject::SizeTag::update(leftover_size, tags);
-      new_array.raw_ptr()->tags_ = tags;
+      raw->ptr()->tags_ = tags;
       intptr_t leftover_len =
           ((leftover_size - Array::InstanceSize(0)) / kWordSize);
-      new_array.SetLength(leftover_len);
+      raw->ptr()->tags_ = tags;
+      raw->ptr()->length_ = Smi::New(leftover_len);
     } else {
       // Update the leftover space as a basic object.
       ASSERT(leftover_size == Object::InstanceSize());
-      Object& new_object = Object::Handle(isolate, RawObject::FromAddr(addr));
-      new_object.raw()->ptr()->class_ = isolate->object_store()->object_class();
+      RawObject* raw = reinterpret_cast<RawObject*>(RawObject::FromAddr(addr));
+      raw->ptr()->class_ = isolate->object_store()->object_class();
       tags = RawObject::SizeTag::update(leftover_size, tags);
-      new_object.raw()->ptr()->tags_ = tags;
+      raw->ptr()->tags_ = tags;
     }
   }
   return array.raw();