[Bug c++/91304] maybe_unused attribute ignored on variable declared in if declaration

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91304

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |10.0, 9.1.0

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.  These forms work:

  int f();

  void g()
  {   
    if (int i [[maybe_unused]] = f()) { }
  }

  void h()
  {   
    if (auto i [[maybe_unused]] = f()) { }
  }