Verify/document assumption about stack resource addresses.

runtime/vm/longjump.cc

 // Copyright (c) 2011, 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/longjump.h"
 
 #include "include/dart_api.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/isolate.h"
@@ skipping 37 matching lines @@
 #define CHECK_REUSABLE_HANDLE(name)                                            \
   ASSERT(!isolate->reusable_##name##_handle_scope_active());
 REUSABLE_HANDLE_LIST(CHECK_REUSABLE_HANDLE)
 #undef CHECK_REUSABLE_HANDLE
 #endif  // defined(DEBUG)
 
   // Remember the error in the sticky error of this isolate.
   isolate->object_store()->set_sticky_error(error);
 
   // Destruct all the active StackResource objects.
-  StackResource* current_resource = isolate->top_resource();
-  while (current_resource != top_) {
-    current_resource->~StackResource();
-    current_resource = isolate->top_resource();
-  }
+  StackResource::Unwind(isolate, top_);
   longjmp(environment_, value);
   UNREACHABLE();
 }
 
 }  // namespace dart