pkg/front_end/testcases/inference/generic_methods_downwards_inference_fold.dart:20:5: Context: Write to y@448
  y = /*info:DYNAMIC_CAST*/ z;
    ^
pkg/front_end/testcases/inference/generic_methods_downwards_inference_fold.dart:35:5: Context: Write to y@976
  y = /*info:DYNAMIC_CAST*/ z;
    ^