Fix language/bad_constructor_test in dartk and analyzer.

pkg/kernel/lib/analyzer/ast_from_analyzer.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 kernel.analyzer.ast_from_analyzer;
 
 import '../ast.dart' as ast;
 import '../frontend/accessors.dart';
 import '../frontend/super_initializers.dart';
 import '../log.dart';
 import '../type_algebra.dart';
@@ skipping 2720 matching lines @@
 
   visitConstructorDeclaration(ConstructorDeclaration node) {
     if (node.factoryKeyword != null) {
       buildFactoryConstructor(node);
     } else {
       buildGenerativeConstructor(node);
     }
   }
 
   void buildGenerativeConstructor(ConstructorDeclaration node) {
+    if (currentMember is! ast.Constructor) {
+      buildBrokenMember();
+      return;
+    }
     addAnnotations(node.metadata);
     ast.Constructor constructor = currentMember;
     constructor.function = scope.buildFunctionNode(node.parameters, node.body,
         inferredReturnType: const ast.VoidType())..parent = constructor;
     handleNativeBody(node.body);
     if (node.body is EmptyFunctionBody && !constructor.isExternal) {
       var function = constructor.function;
       function.body = new ast.EmptyStatement()..parent = function;
     }
     for (var parameter in node.parameters.parameterElements) {
@@ skipping 32 matching lines @@
           ? new ast.InvalidInitializer()
           : new ast.SuperInitializer(
               target, new ast.Arguments(<ast.Expression>[]));
       constructor.initializers.add(initializer..parent = constructor);
     } else {
       moveSuperInitializerLast(constructor);
     }
   }
 
   void buildFactoryConstructor(ConstructorDeclaration node) {
+    if (currentMember is! ast.Procedure) {
+      buildBrokenMember();
+      return;
+    }
     addAnnotations(node.metadata);
     ast.Procedure procedure = currentMember;
     ClassElement classElement = resolutionMap
         .elementDeclaredByConstructorDeclaration(node)
         .enclosingElement;
     ast.Class classNode = procedure.enclosingClass;
     var types = getFreshTypeParameters(classNode.typeParameters);
     for (int i = 0; i < classElement.typeParameters.length; ++i) {
       scope.localTypeParameters[classElement.typeParameters[i]] =
           types.freshTypeParameters[i];
@@ skipping 182 matching lines @@
     if (list[i - 1].compareTo(item) == 0) {
       ++deleted;
     } else if (deleted > 0) {
       list[i - deleted] = item;
     }
   }
   if (deleted > 0) {
     list.length -= deleted;
   }
 }