Ensure the debugger keeps a reference to code objects

runtime/vm/raw_object.cc

 // Copyright (c) 2012, 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/raw_object.h"
 
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
@@ skipping 371 matching lines @@
   // helper functions to the raw object interface.
   Function fn;
   fn = raw_fun;
 
   Code code;
   code = fn.CurrentCode();
 
   if (!code.IsNull() &&  // The function may not have code.
       !code.is_optimized() &&
       (fn.CurrentCode() == fn.unoptimized_code()) &&
-      !fn.HasBreakpoint() &&
+      !code.HasBreakpoint() &&
       (fn.usage_counter() >= 0)) {
     fn.set_usage_counter(fn.usage_counter() / 2);
     if (FLAG_always_drop_code || (fn.usage_counter() == 0)) {
       return true;
     }
   }
   return false;
 }
 
 
@@ skipping 440 matching lines @@
 
 intptr_t RawMirrorReference::VisitMirrorReferencePointers(
     RawMirrorReference* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return MirrorReference::InstanceSize();
 }
 
 }  // namespace dart