Use analyzer 0.24.3: now that our changes are integrated into analyzer, we can

lib/src/codegen/reify_coercions.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.reify_coercions;
 
 import 'package:analyzer/analyzer.dart' as analyzer;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:logging/logging.dart' as logger;
@@ skipping 583 matching lines @@
           _ftMap(type.namedParameterTypes);
           _ftList(type.normalParameterTypes);
           _ftList(type.optionalParameterTypes);
           _ft(type.returnType);
           return;
         }
         assert(type is! InterfaceType);
         assert(false);
       }
       if (type is VoidType) return;
-      assert(type is! UnionType);

[Siggi Cherem (dart-lang), 2015/04/08 20:58:55]

UnionType was deleted in 0.24.3

       print(type.toString());
       assert(false);
     }
     _ft(type);
     return s.toList();
   }
 
   List<FormalParameter> _formalParameterListForFunctionType(FunctionType type) {
     var namedParameters = type.namedParameterTypes;
     var normalParameters = type.normalParameterTypes;
@@ skipping 106 matching lines @@
   Expression _typeExpression(TypeName t) {
     if (t.typeArguments != null && t.typeArguments.length > 0) {
       var w = AstBuilder.identifierFromString("_");
       var fp = AstBuilder.simpleFormal(w, t);
       var f = AstBuilder.blockFunction(<FormalParameter>[fp], <Statement>[]);
       return new RuntimeOperation("type", <Expression>[f]);
     }
     return t.name;
   }
 }