Tweak for FunctionTypeImpl.==.

pkg/analyzer/lib/src/generated/element.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.element;
 
 import 'dart:collection';
@@ skipping 4884 matching lines @@
     }
     return TypeParameterElement.EMPTY_LIST;
   }
 
   @override
   bool operator ==(Object object) {
     if (object is! FunctionTypeImpl) {
       return false;
     }
     FunctionTypeImpl otherType = object as FunctionTypeImpl;
-    return TypeImpl.equalArrays(
+    return returnType == otherType.returnType &&
+        TypeImpl.equalArrays(
             normalParameterTypes, otherType.normalParameterTypes) &&
         TypeImpl.equalArrays(
             optionalParameterTypes, otherType.optionalParameterTypes) &&
-        _equals(namedParameterTypes, otherType.namedParameterTypes) &&
-        returnType == otherType.returnType;
+        _equals(namedParameterTypes, otherType.namedParameterTypes);
   }
 
   @override
   void appendTo(StringBuffer buffer) {
     List<DartType> normalParameterTypes = this.normalParameterTypes;
     List<DartType> optionalParameterTypes = this.optionalParameterTypes;
     Map<String, DartType> namedParameterTypes = this.namedParameterTypes;
     DartType returnType = this.returnType;
     buffer.write("(");
     bool needsComma = false;
@@ skipping 5555 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }