Fix an off-by-one error in deoptimization compression.

runtime/vm/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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 8523 matching lines @@
   for (intptr_t i = 0; i < Length(); i++) {
     index += OS::SNPrint((buffer + index),
                          (len - index),
                          "[%s]",
                          deopt_instrs[i]->ToCString());
   }
   return buffer;
 }
 
 
+// Returns a bool so it can be asserted.
+bool DeoptInfo::VerifyDecompression(const GrowableArray<DeoptInstr*>& original,
+                                    const Array& deopt_table) const {
+  intptr_t length = TranslationLength();
+  GrowableArray<DeoptInstr*> unpacked(length);
+  ToInstructions(deopt_table, &unpacked);
+  ASSERT(unpacked.length() == original.length());
+  for (intptr_t i = 0; i < unpacked.length(); ++i) {
+    ASSERT(unpacked[i]->Equals(*original[i]));
+  }
+  return true;
+}
+
+
 void DeoptInfo::PrintToJSONStream(JSONStream* stream, bool ref) const {
   JSONObject jsobj(stream);
 }
 
 
 RawDeoptInfo* DeoptInfo::New(intptr_t num_commands) {
   ASSERT(Object::deopt_info_class() != Class::null());
   if ((num_commands < 0) || (num_commands > kMaxElements)) {
     FATAL1("Fatal error in DeoptInfo::New(): invalid num_commands %" Pd "\n",
            num_commands);
@@ skipping 6331 matching lines @@
   return "_MirrorReference";
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   JSONObject jsobj(stream);
 }
 
 
 }  // namespace dart