Fix for issue 2437

compiler/java/com/google/dart/compiler/resolver/Resolver.java

 // 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import com.google.dart.compiler.DartCompilationPhase;
@@ skipping 1018 matching lines @@
         if (!element.getModifiers().isStatic() && !Elements.isTopLevel(element)) {
           onError(x, ResolverErrorCode.CANNOT_ACCESS_FIELD_IN_INIT);
         }
       }
 
       // May be local variable declared in lexical scope, but its declaration is not visited yet.
       if (getContext().getScope().isDeclaredButNotReachedVariable(name)) {
         onError(x, ResolverErrorCode.USING_LOCAL_VARIABLE_BEFORE_DECLARATION, x);
       }
 
+      if (!isQualifier) {
+        switch (ElementKind.of(element)) {
+          case CLASS:
+          case FUNCTION_TYPE_ALIAS:
+            onError(x, ResolverErrorCode.CANNOT_USE_TYPE, name);
+            break;
+          case TYPE_VARIABLE:
+            onError(x, ResolverErrorCode.CANNOT_USE_TYPE_VARIABLE, name);
+            break;
+        }
+      }
+
       // If we we haven't resolved the identifier, it will be normalized to
       // this.<identifier>.
 
       return recordElement(x, element);
     }
 
     /**
      * Possibly recursive check on the resolved identifier.
      */
     private Element checkResolvedIdentifier(DartIdentifier x, boolean isQualifier, Scope scope,
@@ skipping 1020 matching lines @@
         ClassElement nextClass = (ClassElement) nextConstructorElement.getEnclosingElement();
         ClassElement currentClass = (ClassElement) constructor.getEnclosingElement();
         if (nextClass == currentClass) {
           return (ConstructorNodeElement) nextConstructorElement;
         }
       }
     }
     return null;
   }
 }