[Bug fortran/68237] New: ICE on invalid with submodules

["martin at mpa-garching dot mpg dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68237

            Bug ID: 68237
           Summary: ICE on invalid with submodules
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: martin@mpa-garching.mpg.de
  Target Milestone: ---

Current trunk gfortran ICEs on the code below instead of producing an eror
message:

module m1
end module

submodule (m1) m2

contains

module procedure foo
end procedure

end submodule

gfortran bug.f08
f951: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.