[Bug fortran/78474] New: gfortran accepts invalid submodule syntax

[nick.brealey at cobham dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78474

            Bug ID: 78474
           Summary: gfortran accepts invalid submodule syntax
           Product: gcc
           Version: 6.2.1
               URL: https://software.intel.com/en-us/forums/intel-fortran-
                    compiler-for-linux-and-mac-os-x/topic/703642
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nick.brealey at cobham dot com
  Target Milestone: ---

gfortran accepts invalid submodule syntax:

submodule (mtop:submod:subsubmod) subsubsubmod

the correct syntax should only have the top level module and the immediate
parent.

This issue was discussed on the Intel Fortran forum at the URL above.