Do not reload isolates if we are in the process of shutting down the VM

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 1054 matching lines @@
       lib.SetLoaded();
     }
     lib.InitExportedNamesCache();
   }
   TokenStream::CloseSharedTokenList(this);
 }
 
 
 bool Isolate::CanReload() const {
 #ifndef PRODUCT
-  return (!ServiceIsolate::IsServiceIsolateDescendant(this) &&
-          is_runnable() && !IsReloading() && no_reload_scope_depth_ == 0);
+  return !ServiceIsolate::IsServiceIsolateDescendant(this) &&
+         is_runnable() && !IsReloading() && (no_reload_scope_depth_ == 0) &&
+         IsolateCreationEnabled();
 #else
   return false;
 #endif
 }
 
 
 #ifndef PRODUCT
 void Isolate::ReportReloadError(const Error& error) {
   ASSERT(IsReloading());
   reload_context_->AbortReload(error);
@@ skipping 1345 matching lines @@
   creation_enabled_ = false;
 }
 
 
 void Isolate::EnableIsolateCreation() {
   MonitorLocker ml(isolates_list_monitor_);
   creation_enabled_ = true;
 }
 
 
+bool Isolate::IsolateCreationEnabled() {
+  MonitorLocker ml(isolates_list_monitor_);
+  return creation_enabled_;
+}
+
+
 void Isolate::KillLocked(LibMsgId msg_id) {
   Dart_CObject kill_msg;
   Dart_CObject* list_values[4];
   kill_msg.type = Dart_CObject_kArray;
   kill_msg.value.as_array.length = 4;
   kill_msg.value.as_array.values = list_values;
 
   Dart_CObject oob;
   oob.type = Dart_CObject_kInt32;
   oob.value.as_int32 = Message::kIsolateLibOOBMsg;
@@ skipping 415 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