MalformedType used for all invalid type annotations.

tests/language/type_annotation_test.dart

+// Copyright (c) 2012, 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.
+
+// Test for type arguments and prefixes on special types.
+
+class C<T> {
+  C.named();
+
+  // This is a syntax error.
+  void<T> voidWithTypeArguments() {} /// 01: compile-time error
+
+  // This is a malformed type since 'dynamic' is not a generic type.
+  dynamic<T> dynamicWithTypeArguments() => new Object(); /// 02: static type warning, dynamic type error
+
+  // This is a syntax error.
+  void.suffix voidAsPrefix() {} /// 03: compile-time error
+
+  // This is a malformed type since since 'dynamic' is not a prefix and 'suffix'
+  // therefore cannot be resolved.
+  dynamic.suffix dynamicAsPrefix() => new Object(); /// 04: static type warning, dynamic type error
+
+  // This is a syntax error.
+  prefix.void voidWithPrefix() {} /// 05: compile-time error
+
+  // This is a malformed type since 'prefix' cannot be resolved.
+  prefix.dynamic dynamicWithPrefix() => new Object(); /// 06: static type warning, dynamic type error
+
+  // This is a malformed type since 'T' is not a generic type.
+  T<int> typeVariableWithTypeArguments() => new Object(); /// 07: static type warning, dynamic type error
+
+  // This is a malformed type since 'T' is in a static member and is not a
+  // generic type.
+  static T<int> staticTypeVariableWithTypeArguments() => new Object(); /// 08: static type warning, dynamic type error
+
+  // This is a malformed type since 'C' is not a prefix.
+  C.named constructorName() => new C.named(); /// 09: static type warning, dynamic type error
+}
+
+main() {
+  var c = new C<int>.named();
+
+  c.voidWithTypeArguments(); /// 01: continued
+  c.dynamicWithTypeArguments(); /// 02: continued
+  c.voidAsPrefix(); /// 03: continued
+  c.dynamicAsPrefix(); /// 04: continued
+  c.voidWithPrefix(); /// 05: continued
+  c.dynamicWithPrefix(); /// 06: continued
+  c.typeVariableWithTypeArguments(); /// 07: continued
+  C.staticTypeVariableWithTypeArguments(); /// 08: continued
+  c.constructorName(); /// 09: continued
+}
+