Fix an off-by-one error in the stack frame iteration.

runtime/vm/raw_object.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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 771 matching lines @@
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->code_);
   }
   RawCode* code_;  // Code object corresponding to the frame described.
   RawSmi* bitmap_size_in_bytes_;  // Size of the bit map in bytes.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->bitmap_size_in_bytes_);
   }
   uword pc_;  // PC corresponding to this stack map representation.
-  intptr_t min_set_bit_offset_;  // Minimum bit offset which is set.
-  intptr_t max_set_bit_offset_;  // Maximum bit offset which is set.
+  intptr_t min_set_bit_index_;  // Minimum bit offset which is set.
+  intptr_t max_set_bit_index_;  // Maximum bit offset which is set.
 
   // Variable length data follows here (bitmap of the stack layout).
   uint8_t data_[0];
 };
 
 
 class RawLocalVarDescriptors : public RawObject {
  public:
   enum VarInfoKind {
     kStackVar = 1,
@@ skipping 713 matching lines @@
          kExternalUint64Array == kByteArray + 18 &&
          kExternalFloat32Array == kByteArray + 19 &&
          kExternalFloat64Array == kByteArray + 20 &&
          kClosure == kByteArray + 21);
   return (index >= kByteArray && index <= kClosure);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_