Create separate scopes for constructors, setters, and other members.

pkg/front_end/lib/src/fasta/kernel/kernel_mixin_application_builder.dart

 // Copyright (c) 2016, 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 fasta.kernel_mixin_application_builder;
 
 import 'package:kernel/ast.dart' show InterfaceType, Supertype, setParents;
 
 import '../modifier.dart' show abstractMask;
 
+import '../source/source_class_builder.dart' show SourceClassBuilder;
+
+import '../util/relativize.dart' show relativizeUri;
+
 import 'kernel_builder.dart'
     show
-        Builder,
         ConstructorReferenceBuilder,
         KernelLibraryBuilder,
         KernelNamedTypeBuilder,
         KernelTypeBuilder,
         KernelTypeVariableBuilder,
         LibraryBuilder,
+        MemberBuilder,
         MixinApplicationBuilder,
+        Scope,
         TypeBuilder,
         TypeVariableBuilder;
 
-import '../util/relativize.dart' show relativizeUri;
-
-import '../source/source_class_builder.dart' show SourceClassBuilder;
-
 class KernelMixinApplicationBuilder
     extends MixinApplicationBuilder<KernelTypeBuilder>
     implements KernelTypeBuilder {
   final int charOffset;
 
   final String relativeFileUri;
 
   final KernelLibraryBuilder library;
 
   Supertype builtType;
@@ skipping 48 matching lines @@
 
     SourceClassBuilder cls =
         library.mixinApplicationClasses.putIfAbsent(name, () {
       SourceClassBuilder cls = new SourceClassBuilder(
           null,
           abstractMask,
           name,
           newTypeVariables,
           supertype,
           null,
-          <String, Builder>{},
+          new Scope(<String, MemberBuilder>{}, <String, MemberBuilder>{},
+              library.scope.withTypeVariables(newTypeVariables),
+              isModifiable: false),
+          new Scope(<String, MemberBuilder>{}, null, null, isModifiable: false),
           library,
           <ConstructorReferenceBuilder>[],
           charOffset,
           null,
           mixin);
       library.addImplementationBuilder(name, cls, charOffset);
       if (newTypeVariables != null) {
         for (KernelTypeVariableBuilder t in newTypeVariables) {
           cls.cls.typeParameters.add(t.parameter);
         }
         setParents(cls.cls.typeParameters, cls.cls);
       }
       return cls;
     });
     return new KernelNamedTypeBuilder(
         name, typeArguments, charOffset, library.fileUri)..builder = cls;
   }
 }