Fix for issue 192 in domokit/mojo

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 13842 matching lines @@
   const intptr_t constants_len = constants.Length();
   // Linear search to see whether this value is already present in the
   // list of canonicalized constants.
   intptr_t index = 0;
   while (index < constants_len) {
     result ^= constants.At(index);
     if (result.IsNull()) {
       break;
     }
     if (this->CanonicalizeEquals(result)) {
+      ASSERT(result.IsCanonical());
       return result.raw();
     }
     index++;
   }
   // The value needs to be added to the list. Grow the list if
   // it is full.
   result ^= this->raw();
   if (result.IsNew()) {
     // Create a canonical object in old space.
     result ^= Object::Clone(result, Heap::kOld);
@@ skipping 2666 matching lines @@
   // Linear search to see whether this value is already present in the
   // list of canonicalized constants.
   Mint& canonical_value = Mint::Handle();
   intptr_t index = 0;
   while (index < constants_len) {
     canonical_value ^= constants.At(index);
     if (canonical_value.IsNull()) {
       break;
     }
     if (canonical_value.value() == value) {
+      ASSERT(canonical_value.IsCanonical());
       return canonical_value.raw();
     }
     index++;
   }
   // The value needs to be added to the constants list. Grow the list if
   // it is full.
   canonical_value = Mint::New(value, Heap::kOld);
   cls.InsertCanonicalConstant(index, canonical_value);
   canonical_value.SetCanonical();
   return canonical_value.raw();
@@ skipping 4251 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart