The code and error message below demonstrate an ICE that occurs when passing an actual argument that extends a type with two components: a default-initialized scalar and an allocatable scalar coarray.

Damian


$ cat all.f90 
program main
  implicit none
  type co_object
    logical :: defined=.false.
    real, allocatable :: dummy_to_facilitate_extension[:]
  end type
  type, extends(co_object) :: global_field
  end type
  type(global_field) T
  call assign_local_field(T)
contains
  subroutine assign_local_field(lhs)
    type(global_field) lhs
  end subroutine
end program

$ gfortran -fcoarray=single all.f90 
all.f90: In function 'MAIN__':
all.f90:9:0: internal compiler error: in fold_convert_loc, at fold-const.c:2116
   type(global_field) T
 ^

all.f90:9:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Abort trap: 6

$ gfortran --version
GNU Fortran (MacPorts gcc49 4.9-20140406_0) 4.9.0 20140406 (experimental)
Copyright (C) 2014 Free Software Foundation, Inc.