gcc/testsuite/gfortran.dg/ambiguous_reference_1.f90

   1 ! { dg-do compile }
   2 ! Tests the fix for PR33550, in which an ICE would occur, instead of
   3 ! the abiguous reference error.
   4 !
   5 ! Found at
   6 ! http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/1abc1549a6a164f1/
   7 ! by James Van Buskirk:
   8 !
   9 module M1
  10    real x
  11 end module M1
  12
  13 module M2
  14    contains
  15       subroutine y
  16       end subroutine y
  17 end module M2
  18
  19 module M3
  20    use M2, x => y
  21 end module M3
  22
  23 module M4
  24    use M1
  25    use M3
  26 end module M4
  27
  28 module M5
  29    use M4             ! 'x' is ambiguous here but is not referred to
  30 end module M5
  31
  32 module M6
  33    use M5             ! ditto
  34 end module M6
  35
  36 program test
  37    use M1
  38    use M3
  39    interface
  40       function x(z)   ! { dg-error "ambiguous reference" }
  41       end function x  ! { dg-error "Expecting END INTERFACE" }
  42    end interface
  43
  44    write(*,*) 'Hello, world!'
  45 end program test
  46
  47 function x(z)
  48    x = z
  49 end function x