| Index: sdk/lib/_internal/pub/lib/src/barback/dart2js_transformer.dart | 
| diff --git a/sdk/lib/_internal/pub/lib/src/barback/dart2js_transformer.dart b/sdk/lib/_internal/pub/lib/src/barback/dart2js_transformer.dart | 
| index b3b179721a819fec5074e022ef8158ccda4dcff9..3c942a20b28369d78fa2433149da350698b6be48 100644 | 
| --- a/sdk/lib/_internal/pub/lib/src/barback/dart2js_transformer.dart | 
| +++ b/sdk/lib/_internal/pub/lib/src/barback/dart2js_transformer.dart | 
| @@ -62,9 +62,9 @@ class Dart2JSTransformer extends Transformer implements LazyTransformer { | 
| bool isPrimary(AssetId id) { | 
| if (id.extension != ".dart") return false; | 
|  | 
| -    // These should only contain libraries. For efficiency's sake, we don't | 
| +    // "lib" should only contain libraries. For efficiency's sake, we don't | 
| // look for entrypoints in there. | 
| -    return !["asset/", "lib/"].any(id.path.startsWith); | 
| +    return !id.path.startsWith("lib/"); | 
| } | 
|  | 
| Future apply(Transform transform) { | 
|  |