Skip constructors from ElementEnvironment.forEachClassMember

tests/compiler/dart2js/kernel/closed_world2_test.dart

 // Copyright (c) 2017, 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.
 
 // Partial test that the closed world computed from [WorldImpact]s derived from
 // kernel is equivalent to the original computed from resolution.
 library dart2js.kernel.closed_world2_test;
 
 import 'dart:async';
 
@@ skipping 273 matching lines @@
 
       check(cls1, cls2, 'superclass', env1.getSuperClass(cls1),
           env2.getSuperClass(cls2), equivalence.entityEquivalence);
 
       Map<MemberEntity, ClassEntity> members1 = <MemberEntity, ClassEntity>{};
       Map<MemberEntity, ClassEntity> members2 = <MemberEntity, ClassEntity>{};
       env1.forEachClassMember(cls1,
           (ClassEntity declarer1, MemberEntity member1) {
         members1[member1] = declarer1;
       });
-      env1.forEachClassMember(cls1,
+      env2.forEachClassMember(cls2,

[Siggi Cherem (dart-lang), 2017/05/09 18:10:56]

eek!

           (ClassEntity declarer2, MemberEntity member2) {
         members2[member2] = declarer2;
       });
       checkMapEquivalence(cls1, cls2, 'members', members1, members2,
           equivalence.entityEquivalence, equivalence.entityEquivalence);
 
       classes2.add(cls2);
     });
     env2.forEachClass(lib2, (ClassEntity cls2) {
       Expect.isTrue(classes2.contains(cls2), "Extra class $cls2 in $lib2");
     });
   });
 
   // TODO(johnniwinther): Test the remaining properties of [ElementEnvironment].
 }