Add Dart_GetStickyError

runtime/vm/isolate.cc

 // Copyright (c) 2013, 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/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 1503 matching lines @@
       OS::PrintErr("in ShutdownIsolate: %s\n", error.ToErrorCString());
     }
     Dart::RunShutdownCallback();
   }
   // Shut the isolate down.
   Dart::ShutdownIsolate(isolate);
 }
 
 
 void Isolate::SetStickyError(RawError* sticky_error) {
-  ASSERT(sticky_error_ == Error::null());
+  ASSERT(((sticky_error_ == Error::null()) ||
+         (sticky_error == Error::null())) &&
+         (sticky_error != sticky_error_));
   sticky_error_ = sticky_error;
-  message_handler()->PausedOnExit(true);
 }
 
 
 void Isolate::Run() {
   message_handler()->Run(Dart::thread_pool(),
                          RunIsolate,
                          ShutdownIsolate,
                          reinterpret_cast<uword>(this));
 }
 
@@ skipping 1359 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart