Fix mismatched parenthesis error message

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 9352 matching lines @@
   intptr_t i = 0;
   while (i < num_classes) {
     if (cls.raw() == patch_classes.At(i)) break;
     i++;
   }
   if (i == num_classes) return;
   // Replace the entry with the script. We keep the script so that
   // Library::LoadedScripts() can find it without having to iterate
   // over the members of each class.
   ASSERT(i < num_classes);  // We must have found a class.
-  Class& pc = Class::Handle();
-  pc ^= patch_classes.At(i);
-  const Script& patch_script = Script::Handle(pc.script());
+  const Script& patch_script = Script::Handle(cls.script());
   patch_classes.SetAt(i, patch_script);
 }
 
 
 static RawString* MakeClassMetaName(const Class& cls) {
   return Symbols::FromConcat(Symbols::At(), String::Handle(cls.Name()));
 }
 
 
 static RawString* MakeFieldMetaName(const Field& field) {
@@ skipping 423 matching lines @@
     }
 
     // Add all scripts from patch classes.
     GrowableObjectArray& patches = GrowableObjectArray::Handle(patch_classes());
     for (intptr_t i = 0; i < patches.Length(); i++) {
       entry = patches.At(i);
       if (entry.IsClass()) {
         owner_script = Class::Cast(entry).script();
       }  else {
         ASSERT(entry.IsScript());
-        owner_script ^= Script::Cast(entry).raw();
+        owner_script = Script::Cast(entry).raw();
       }
       AddScriptIfUnique(scripts, owner_script);
     }
 
     cls ^= toplevel_class();
     if (!cls.IsNull()) {
       owner_script = cls.script();
       AddScriptIfUnique(scripts, owner_script);
       // Special case: Scripts that only contain external top-level functions
       // are not included above, but can be referenced through a library's
@@ skipping 12126 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart