Fix for issue 27380 - VM stuck in deadlock with background finalization and background compiler thr…

runtime/vm/exceptions.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/exceptions.h"
 
 #include "platform/address_sanitizer.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 312 matching lines @@
   if (use_preallocated_stacktrace) {
     stacktrace ^= isolate->object_store()->preallocated_stack_trace();
     PreallocatedStacktraceBuilder frame_builder(stacktrace);
     handler_exists = FindExceptionHandler(thread,
                                           &handler_pc,
                                           &handler_sp,
                                           &handler_fp,
                                           &handler_needs_stacktrace);
     if (handler_pc == 0) {
       // No Dart frame.
-      ASSERT(!thread->IsMutatorThread());
       ASSERT(incoming_exception.raw() ==
              isolate->object_store()->out_of_memory());
       const UnhandledException& error = UnhandledException::Handle(
           zone, isolate->object_store()->preallocated_unhandled_exception());
       thread->long_jump_base()->Jump(1, error);
       UNREACHABLE();
     }
     if (handler_needs_stacktrace) {
       BuildStackTrace(&frame_builder);
     }
@@ skipping 395 matching lines @@
   }
 
   return DartLibraryCalls::InstanceCreate(library,
                                           *class_name,
                                           *constructor_name,
                                           arguments);
 }
 
 
 }  // namespace dart