[Bug fortran/103931] Type name "c_ptr" is ambiguous when iso_c_binding is imported both directly and indirectly

[anlauf at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103931

--- Comment #22 from anlauf at gcc dot gnu.org ---
Here another invalid example which ICEs because the clash is not detected:

module AModule
  implicit none
  type, bind(C) :: c_ptr
     private
     integer(8) :: c_address
  end type c_ptr
end module

module GModule
  use AModule, only: C_PTR
  use, intrinsic :: ISO_C_BINDING, only: C_PTR
  implicit none
  type(c_ptr) :: ptr
end module

This hits an assert a few lines above the place you looked at...
(Interchanging the use statements helps here.)