pkg/front_end/parser_testcases/primary_constructors/new_new.dart

class C {
  new new();
  const new new();
  new new() : this.x = 0;
  const new new() : this.x = 0;
  new new() {}
  const new new() {}
  new new() : this.x = 0 {}
  const new new() : this.x = 0 {}
}