Fortran DW_TAG_imported_module now crashes GDB

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

Hi,

not sure if this list is appropriate for this mail but at least I see no
existing Bugzilla for Archer.

Current Fedora Rawhide gcc-gfortran-4.3.1-8
	http://koji.fedoraproject.org/koji/buildinfo?buildID=60143
started to use Jakub Jelinek's patch for DW_TAG_imported_module and
DW_TAG_imported_declaration which has regressed GDB (all its variants).

$ gfortran -o test test.f90 -g;gdb -ex 'b 2' ./test

On Sat, 23 Aug 2008 13:48:22 +0200, Tobias Burnus wrote:
> With Jakob's patches, I see the following internal error in gdb. I don't
> know whether this is a gdb bug or whether only the DWARF has problems.
> 
> $ ~/projects/gdb/inst/bin/gdb --quiet a.out
> (gdb) b 2
> ../../src/gdb/dwarf2read.c:2764: internal-error: process_die: Assertion
> `die->child == NULL' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> 
> See attached .f90 and .s file.

Please notify if you take the bug.


Regards,
Jan

MODULE pr29635_1
  integer :: varx, vary, varz
  real :: varv, varw
  common /foo/ varx, varw, vary
  type typex
    real :: fldx
  end type
  type typey
    integer :: fldy
  end type
  type(typex) :: varu  
contains
  subroutine init
    varx = 1
    vary = 2
    varz = 3
    varv = 4.5
    varw = 5.5
    varu%fldx = 6.5
  end subroutine init
END MODULE pr29635_1
subroutine foo1
  USE pr29635_1
  varx = 6
end subroutine foo1
subroutine foo2
  USE pr29635_1, only : varz
  varz = 7
end subroutine foo2
subroutine foo3
  USE pr29635_1, a=>varx, b=>varx, c=>varv, d=>typex
  type (d) :: h
  a = 8
  c = 7.0
end subroutine foo3
subroutine foo4
  USE pr29635_1, only: a=>varz, b=>varz, c=>varv
  b = 9
  c = 7.5
end subroutine foo4

call foo4()
end