Fix for crash because of missing type of default generic function typed parameters.

pkg/analyzer/test/src/dart/analysis/driver_test.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.
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 1305 matching lines @@
 class A {
   int foo( bar<T extends B>() ) {}
 }
 class B {}
 ''');
 
     AnalysisResult result = await driver.getResult(testFile);
     expect(result.path, testFile);
   }
 
+  test_getResult_genericFunctionType_parameter_named() async {
+    String content = '''
+class C {
+  test({bool Function(String) p}) {}
+}
+''';
+    addTestFile(content, priority: true);
+
+    var result = await driver.getResult(testFile);
+    expect(result.errors, isEmpty);
+  }
+
   test_getResult_inferTypes_finalField() async {
     addTestFile(
         r'''
 class C {
   final f = 42;
 }
 ''',
         priority: true);
     await scheduler.waitForIdle();
 
@@ skipping 1452 matching lines @@
     var path = _p('/test.dart');
     expect(() {
       driver.removeFile(path);
     }, throwsStateError);
   }
 
   String _p(String path) => provider.convertPath(path);
 }
 
 class _SourceMock extends TypedMock implements Source {}