Fix bug 5944

runtime/vm/debugger.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/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 995 matching lines @@
     }
   }
 
   if (target_function.HasImplicitClosureFunction()) {
     // There is a closurized version of this function. If the closure
     // is already compiled, we need to set a code breakpoint in its
     // code.
     const Function& closure =
         Function::Handle(target_function.ImplicitClosureFunction());
     if (closure.HasCode()) {
+      EnsureFunctionIsDeoptimized(closure);
       CodeBreakpoint* closure_bpt =
           MakeCodeBreakpoint(closure, first_token_pos, last_token_pos);
       if ((closure_bpt != NULL) && (closure_bpt->src_bpt() == NULL)) {
         closure_bpt->set_src_bpt(source_bpt);
       }
     }
   }
   source_bpt->Enable();
   return source_bpt;
 }
@@ skipping 611 matching lines @@
 }
 
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 }  // namespace dart