Fix bug 6713

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/bigint_operations.h"
@@ skipping 2463 matching lines @@
     str = ident();
     name = String::Concat(name, str);
     return name.raw();
   } else {
     return ident();
   }
 }
 
 
 const char* UnresolvedClass::ToCString() const {
-  return "UnresolvedClass";
+  const char* format = "unresolved class '%s'";
+  const char* cname =  String::Handle(Name()).ToCString();
+  intptr_t len = OS::SNPrint(NULL, 0, format, cname) + 1;
+  char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
+  OS::SNPrint(chars, len, format, cname);
+  return chars;
 }
 
 
 intptr_t AbstractTypeArguments::Length() const  {
   // AbstractTypeArguments is an abstract class.
   UNREACHABLE();
   return -1;
 }
 
 
@@ skipping 6512 matching lines @@
          (state == RawType::kFinalizedInstantiated) ||
          (state == RawType::kFinalizedUninstantiated));
   raw_ptr()->type_state_ = state;
 }
 
 
 const char* Type::ToCString() const {
   if (IsResolved()) {
     const AbstractTypeArguments& type_arguments =
         AbstractTypeArguments::Handle(arguments());
+    const char* class_name;
+    if (HasResolvedTypeClass()) {
+      class_name = String::Handle(
+          Class::Handle(type_class()).Name()).ToCString();
+    } else {
+      class_name = UnresolvedClass::Handle(unresolved_class()).ToCString();
+    }
     if (type_arguments.IsNull()) {
       const char* format = "Type: class '%s'";
-      const char* class_name =
-          String::Handle(Class::Handle(type_class()).Name()).ToCString();
       intptr_t len = OS::SNPrint(NULL, 0, format, class_name) + 1;
       char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
       OS::SNPrint(chars, len, format, class_name);
       return chars;
     } else {
       const char* format = "Type: class '%s', args:[%s]";
-      const char* class_name =
-          String::Handle(Class::Handle(type_class()).Name()).ToCString();
       const char* args_cstr =
           AbstractTypeArguments::Handle(arguments()).ToCString();
       intptr_t len = OS::SNPrint(NULL, 0, format, class_name, args_cstr) + 1;
       char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
       OS::SNPrint(chars, len, format, class_name, args_cstr);
       return chars;
     }
   } else {
     return "Unresolved Type";
   }
@@ skipping 3114 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart