Fix http://dartbug.com/17555

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 1662 matching lines @@
     NoGCScope no_gc;
     result ^= raw;
   }
   FakeObject fake;
   result.set_handle_vtable(fake.vtable());
   result.set_instance_size(FakeObject::InstanceSize());
   result.set_next_field_offset(FakeObject::NextFieldOffset());
   ASSERT((FakeObject::kClassId != kInstanceCid));
   result.set_id(FakeObject::kClassId);
   result.set_state_bits(0);
-  // VM backed classes are almost ready: run checks and resolve class
-  // references, but do not recompute size.
-  result.set_is_prefinalized();
+  if (FakeObject::kClassId < kInstanceCid) {
+    // VM internal classes are done. There is no finalization needed or
+    // possible in this case.
+    result.set_is_finalized();
+  } else {
+    // VM backed classes are almost ready: run checks and resolve class
+    // references, but do not recompute size.
+    result.set_is_prefinalized();
+  }
   result.set_type_arguments_field_offset_in_words(kNoTypeArguments);
   result.set_num_type_arguments(0);
   result.set_num_own_type_arguments(0);
   result.set_num_native_fields(0);
   result.set_token_pos(Scanner::kNoSourcePos);
   result.InitEmptyFields();
   Isolate::Current()->RegisterClass(result);
   return result.raw();
 }
 
@@ skipping 2086 matching lines @@
     jsobj.AddProperty("error", err);
   }
   jsobj.AddProperty("implemented", is_implemented());
   jsobj.AddProperty("abstract", is_abstract());
   jsobj.AddProperty("patch", is_patch());
   jsobj.AddProperty("finalized", is_finalized());
   jsobj.AddProperty("const", is_const());
   jsobj.AddProperty("super", Class::Handle(SuperClass()));
   jsobj.AddProperty("library", Object::Handle(library()));
   const Script& script = Script::Handle(this->script());
-  intptr_t line_number = 0;
-  intptr_t column_number = 0;
-  script.GetTokenLocation(token_pos(), &line_number, &column_number);
-  jsobj.AddProperty("script", script);
-  jsobj.AddProperty("line", line_number);
-  jsobj.AddProperty("col", column_number);
+  if (!script.IsNull()) {
+    intptr_t line_number = 0;
+    intptr_t column_number = 0;
+    script.GetTokenLocation(token_pos(), &line_number, &column_number);
+    jsobj.AddProperty("script", script);
+    jsobj.AddProperty("line", line_number);
+    jsobj.AddProperty("col", column_number);
+  }
   {
     JSONArray interfaces_array(&jsobj, "interfaces");
     const Array& interface_array = Array::Handle(interfaces());
     Type& interface_type = Type::Handle();
     Class& interface_cls = Class::Handle();
     if (!interface_array.IsNull()) {
       for (intptr_t i = 0; i < interface_array.Length(); ++i) {
         // TODO(turnidge): Use the Type directly once regis has added
         // types to the vmservice.
         interface_type ^= interface_array.At(i);
@@ skipping 13889 matching lines @@
   return "_MirrorReference";
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   Instance::PrintToJSONStream(stream, ref);
 }
 
 
 }  // namespace dart