[Bug fortran/87172] [9 Regression] Spurious "Derived type 'c_funptr' at (1) has not been declared" error after r263782

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87172

--- Comment #1 from janus at gcc dot gnu.org ---
Reduced test case:


module m1
   use iso_c_binding, only: c_funptr
end module

module m2
  use m1
  use iso_c_binding
end module