pkg/front_end/testcases/regress/issue_33452.dart:11:5: Context: Write to x@296
  x = new ExistingClass();
    ^
pkg/front_end/testcases/regress/issue_33452.dart:12:5: Context: Write to x@296
  x = new ExistingClass<String>();
    ^
pkg/front_end/testcases/regress/issue_33452.dart:13:5: Context: Write to x@296
  x = new ExistingClass<String>.nonExistingConstructor();
    ^
pkg/front_end/testcases/regress/issue_33452.dart:14:5: Context: Write to x@296
  x = new ExistingClass<String, String>.nonExistingConstructor();
    ^
pkg/front_end/testcases/regress/issue_33452.dart:15:5: Context: Write to x@296
  x = new NonExistingClass();
    ^