__attribute__((lifetimebound)) cannot be applied on the implicit "this" parameter

[hokein]

See https://godbolt.org/z/KdGEfdG4r

struct Foo2 {
  int& get1() [[clang::lifetimebound]];  // good
  int& get2() __attribute__((lifetimebound)); // bad

  const int& get3(const int& a __attribute__((lifetimebound))); // good
};


void s() {
  Foo2 f;
  const int &b = f.get3(1);
}