Handle dynamic as type argument.

dart/sdk/lib/_internal/lib/js_mirrors.dart

 // Copyright (c) 2013, 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 dart._js_mirrors;
 
 import 'dart:async';
 
 import 'dart:collection' show
     UnmodifiableListView;
@@ skipping 498 matching lines @@
   }
 }
 
 TypeMirror reflectType(Type key) {
   return reflectClassByMangledName(getMangledTypeName(key));
 }
 
 TypeMirror reflectClassByMangledName(String mangledName) {
   String unmangledName = mangledGlobalNames[mangledName];
   if (mangledName == 'dynamic') return JsMirrorSystem._dynamicType;
+  if (mangledName == 'void') return JsMirrorSystem._voidType;
   if (unmangledName == null) unmangledName = mangledName;
   return reflectClassByName(s(unmangledName), mangledName);
 }
 
 var classMirrors;
 
 TypeMirror reflectClassByName(Symbol symbol, String mangledName) {
   if (classMirrors == null) classMirrors = JsCache.allocate();
   var mirror = JsCache.fetch(classMirrors, mangledName);
   if (mirror != null) return mirror;
@@ skipping 1850 matching lines @@
       // [type] represents a type variable used as type argument for example
       // the type argument of Bar: class Foo<T> extends Bar<T> {}
       TypeMirror typeArgument = getTypeArgument(type);
       if (typeArgument is JsTypeVariableMirror)
         return typeArgument;
     }
     String substituteTypeVariable(int index) {
       var typeArgument = getTypeArgument(index);
       if (typeArgument is JsTypeVariableMirror)
         return '${typeArgument._metadataIndex}';
-      assert(typeArgument is JsClassMirror ||
-             typeArgument is JsTypeBoundClassMirror);
+      if (typeArgument is! JsClassMirror &&
+          typeArgument is! JsTypeBoundClassMirror) {
+        if (typeArgument == JsMirrorSystem._dynamicType) {
+          return 'dynamic';
+        } else if (typeArgument == JsMirrorSystem._voidType) {
+          return 'void';
+        } else {
+          // TODO(ahe): This case shouldn't happen.
+          return 'dynamic';
+        }
+      }
       return typeArgument._mangledName;
     }
     representation =
         runtimeTypeToString(type, onTypeVariable: substituteTypeVariable);
   }
   if (representation != null) {
     return reflectClassByMangledName(
         getMangledTypeName(createRuntimeType(representation)));
   }
   return reflectClass(Function);
@@ skipping 154 matching lines @@
   void operator []=(K key, V value) => _throw();
 
   V putIfAbsent(K key, V ifAbsent()) { _throw(); }
 
   void addAll(Map<K, V> other) => _throw();
 
   V remove(K key) { _throw(); }
 
   void clear() => _throw();
 }