Do not require type class to be finalized when performing a type test.

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 "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 1472 matching lines @@
   return raw() == Type::Handle(Type::ObjectType()).type_class();
 }
 
 
 bool Class::IsCanonicalSignatureClass() const {
   const Function& function = Function::Handle(signature_function());
   return (!function.IsNull() && (function.signature_class() == raw()));
 }
 
 
+// Checks if the type S is a subtype of type T.
+// Type S is specified by this class parameterized with 'type_arguments', and
+// type T by class 'other' parameterized with 'other_type_arguments'.
+// This class and class 'other' do not need to be finalized, however, they must
+// be resolved as well as their interfaces.
 bool Class::IsSubtypeOf(
     const AbstractTypeArguments& type_arguments,
     const Class& other,
     const AbstractTypeArguments& other_type_arguments,
     Error* malformed_error) const {
-  ASSERT(is_finalized());
-  ASSERT(other.is_finalized());
   // Check for DynamicType.
   // The DynamicType on the lefthand side is replaced by the bottom type, which
   // is more specific than any type.
   // Any type is more specific than the DynamicType on the righthand side.
   if (IsDynamicClass() || other.IsDynamicClass()) {
     return true;
   }
   // Check for reflexivity.
   if (raw() == other.raw()) {
     const intptr_t len = NumTypeArguments();
@@ skipping 7627 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart