| Index: pkg/front_end/lib/src/fasta/builder/builder.dart | 
| diff --git a/pkg/front_end/lib/src/fasta/builder/builder.dart b/pkg/front_end/lib/src/fasta/builder/builder.dart | 
| index 7947c51e2e31143f613337d96454eb4f63587c39..5cee11161b6f55740c22ec82e6b3351fb7870a21 100644 | 
| --- a/pkg/front_end/lib/src/fasta/builder/builder.dart | 
| +++ b/pkg/front_end/lib/src/fasta/builder/builder.dart | 
| @@ -88,7 +88,7 @@ abstract class Builder { | 
|  | 
| /// Resolve constructors (lookup names in scope) recorded in this builder and | 
| /// return the number of constructors resolved. | 
| -  int resolveConstructors(covariant Builder parent) => 0; | 
| +  int resolveConstructors(LibraryBuilder parent) => 0; | 
|  | 
| Builder get parent => null; | 
|  | 
|  |