pkg/front_end/testcases/rasta/issue_000004.dart:10:7: Context: Write to f@273
    f *= n;
      ^^
pkg/front_end/testcases/rasta/issue_000004.dart:18:7: Context: Write to f@359
    f *= n;
      ^^
pkg/front_end/testcases/rasta/issue_000004.dart:27:7: Context: Write to f@459
    f *= global;
      ^^