Throw AbstractClassInstantiationError on abstract class instantiation.

lib/compiler/implementation/elements/elements.dart

 // 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.
 
 #library('elements');
 
 #import('dart:uri');
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 #import('../../compiler.dart', prefix: 'api_e');
@@ skipping 1296 matching lines @@
   // backendMembers are members that have been added by the backend to simplify
   // compilation. They don't have any user-side counter-part.
   Link<Element> backendMembers = const Link<Element>();
 
   Link<DartType> allSupertypes;
 
   // Lazily applied patch of class members.
   ClassElement patch = null;
   ClassElement origin = null;
 
-  ClassElement(SourceString name, Element enclosing, this.id, int initialState)
+  ClassElement(SourceString name,
+               Element enclosing,
+               this.id,
+               int initialState)

[ahe, 2012/10/11 18:27:07]

If unchanged, please just keep the old formatting. Then "svn blame" works better
:-)

[aam-me, 2012/10/12 01:14:06]

Done.

     : supertypeLoadState = initialState,
       resolutionState = initialState,
       super(name, ElementKind.CLASS, enclosing);
 
   abstract ClassNode parseNode(Compiler compiler);
 
   InterfaceType computeType(compiler) {
     if (type == null) {
       if (origin === null) {
         ClassNode node = parseNode(compiler);
@@ skipping 635 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }