- The callback_error_ handle was never being setup.

runtime/vm/dart_api_impl_test.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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "platform/utils.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
@@ skipping 1395 matching lines @@
       str ^= Api::UnwrapHandle(handles[i]);
       EXPECT(str.Equals(kTestString1));
     }
     for (int i = 1500; i < 2000; i++) {
       String& str = String::Handle();
       str ^= Api::UnwrapHandle(handles[i]);
       EXPECT(str.Equals(kTestString2));
     }
   }
   EXPECT(scope == state->top_scope());
-  EXPECT_EQ(2000, state->CountPersistentHandles());
+  EXPECT_EQ(2001, state->CountPersistentHandles());
   Dart_ShutdownIsolate();
 }
 
 
 // Test that we are able to create a persistent handle from a
 // persistent handle.
 UNIT_TEST_CASE(NewPersistentHandle_FromPersistentHandle) {
   TestIsolateScope __test_isolate__;
 
   Isolate* isolate = Isolate::Current();
@@ skipping 6112 matching lines @@
                                    NULL);
   int64_t value = 0;
   result = Dart_IntegerToInt64(result, &value);
   EXPECT_VALID(result);
   EXPECT_EQ(260, value);
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart