Check whether type parameters are loaded before emitting

lib/src/codegen/js_codegen.dart

 // Copyright (c) 2015, 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 dev_compiler.src.codegen.js_codegen;
 
 import 'dart:collection' show HashSet, HashMap;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/src/generated/ast.dart' hide ConstantEvaluator;
@@ skipping 975 matching lines @@
   }
 
   bool _typeIsLoaded(DartType type) {
     if (type is FunctionType && (type.name == '' || type.name == null)) {
       return (_typeIsLoaded(type.returnType) &&
           type.optionalParameterTypes.every(_typeIsLoaded) &&
           type.namedParameterTypes.values.every(_typeIsLoaded) &&
           type.normalParameterTypes.every(_typeIsLoaded));
     }
     if (type.isDynamic || type.isVoid || type.isBottom) return true;
+    if (type is ParameterizedType && !type.typeArguments.every(_typeIsLoaded)) {
+      return false;
+    }
     return _loader.isLoaded(type.element);
   }
 
   JS.Expression _emitFunctionTagged(JS.Expression clos, DartType type,
       {topLevel: false}) {
     var name = type.name;
     var lazy = topLevel && !_typeIsLoaded(type);
 
     if (type is FunctionType && (name == '' || name == null)) {
       if (type.returnType.isDynamic &&
@@ skipping 1560 matching lines @@
 
 /// A special kind of element created by the compiler, signifying a temporary
 /// variable. These objects use instance equality, and should be shared
 /// everywhere in the tree where they are treated as the same variable.
 class TemporaryVariableElement extends LocalVariableElementImpl {
   TemporaryVariableElement.forNode(Identifier name) : super.forNode(name);
 
   int get hashCode => identityHashCode(this);
   bool operator ==(Object other) => identical(this, other);
 }