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! { dg-do compile }

! Tests the fix for PR20880, which was due to failure to the failure

! to detect the USE association of a nameless interface for a

! procedure with the same name as the encompassing scope.

!

! Contributed by Joost VandeVondele  

!

module test_mod

interface

  subroutine my_sub (a)

    real a

  end subroutine

end interface

interface

  function my_fun (a)

    real a, my_fun

  end function

end interface

end module

module test_mod2

interface

  function my_fun (a)

    real a, my_fun

  end function

end interface

end module

! This is the original PR, excepting that the error requires the symbol

! to be referenced.

subroutine my_sub (a)

  use test_mod

  real a

  call my_sub (a)  ! { dg-error "ambiguous reference" }

  print *, a

end subroutine

integer function my_fun (a)

  use test_mod

  real a

  print *, a

  my_fun = 1  ! { dg-error "ambiguous reference" }

end function

! This was found whilst investigating => segfault

subroutine thy_sub (a)

  interface

    subroutine thy_sub (a) ! { dg-error "enclosing procedure" }

      real a

    end subroutine

  end interface

  real a

  print *, a

end subroutine

subroutine thy_fun (a)

  use test_mod

  use test_mod2  ! OK because there is no reference to my_fun

  print *, a

end subroutine thy_fun

subroutine his_fun (a)

  use test_mod

  use test_mod2

  print *, my_fun (a)  ! { dg-error "ambiguous reference" }

end subroutine his_fun

! { dg-final { cleanup-modules "test_mod test_mod2" } }