Fix PcDescriptor iteratot to never return a pointer to a memory location since the data can move wi…

runtime/vm/debugger.h

 // 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.
 
 #ifndef VM_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 193 matching lines @@
   RawObject* GetClosureObject(intptr_t num_acatual_args);
 
   uword pc_;
   uword fp_;
   uword sp_;
 
   // The anchor of the context chain for this function.
   Context& ctx_;
   const Code& code_;
   const Function& function_;
+  bool token_pos_initialized_;
   intptr_t token_pos_;
-  const RawPcDescriptors::PcDescriptorRec* desc_rec_;
+  intptr_t try_index_;
 
   intptr_t line_number_;
   intptr_t column_number_;
   intptr_t context_level_;
 
   // Some frames are deoptimized into a side array in order to inspect them.
   const Array& deopt_frame_;
   const intptr_t deopt_frame_offset_;
 
   bool vars_initialized_;
@@ skipping 319 matching lines @@
 
   friend class Isolate;
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_