Fix cluster-fuzz regression with Workers on mips.debug

src/d8.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1707 matching lines @@
             if (Shell::DeserializeValue(isolate, *data, &offset)
                     .ToLocal(&data_value)) {
               Handle<Value> argv[] = {data_value};
               (void)onmessage_fun->Call(context, global, 1, argv);
             }
             delete data;
           }
         }
       }
     }
+    Shell::CollectGarbage(isolate);
   }
-  Shell::CollectGarbage(isolate);
   isolate->Dispose();
 }
 
 
 void Worker::Cleanup() {
   delete thread_;
   thread_ = NULL;
   delete[] script_;
   script_ = NULL;
   in_queue_.Clear();
@@ skipping 657 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif