[Bug fortran/85561] New: [9.0 regression] ICE in in gfc_dep_resolver when compiling OpenCoarrays

["juergen.reuter at desy dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85561

            Bug ID: 85561
           Summary: [9.0 regression] ICE in in gfc_dep_resolver when
                    compiling OpenCoarrays
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: juergen.reuter at desy dot de
  Target Milestone: ---

When compiling OpenCoarrays 2.0.0 I get the following ICE:
cd
/usr/local/packages/OpenCoarrays-2.0.0/_build/src/tests/integration/dist_transpose
&& ../../../../bin/caf -I /usr/local/include -DPREFIX_NAME=_gfortran_caf_
-DGCC_GE_7 -DGCC_GE_8 -DHAVE_MPI -O3 -DNDEBUG -O3 -o
/usr/local/packages/OpenCoarrays-2.0.0/_build/bin/OpenCoarrays-2.0.0-tests/coarray_distributed_transpose
/usr/local/packages/OpenCoarrays-2.0.0/src/tests/integration/dist_transpose/coarray_distributed_transpose.F90
/usr/local/packages/OpenCoarrays-2.0.0/src/tests/integration/dist_transpose/coarray_distributed_transpose.F90:57:0:

             do i = 2, num_nodes;    variable[i] = variable;      end do

internal compiler error: in gfc_dep_resolver, at fortran/dependency.c:2258
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.

Using the official version OpenCoarrays 2.0.0 with the actual 9.0 trunk
r259698. I recently compiled it with 8.0.1 r258195 and it was still working.