[Bug fortran/63744] [4.8/4.9/5 Regression] Duplicate use-statement causes error

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63744

--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I have to admit that I am unsure whether it is valid or not.

I share the same feeling, but if

  use m, only: A => X
  use m, only: B => X

is valid, I don't see why

  use m, only: A => X
  use m, only: A => X

should not.