[Bug fortran/91773] New: Buffer overflow for long module/submodule names

[andreas at skeidsvoll dot no]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91773

            Bug ID: 91773
           Summary: Buffer overflow for long module/submodule names
           Product: gcc
           Version: 9.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andreas at skeidsvoll dot no
  Target Milestone: ---

The compilation of a submodule file crashes with error

*** buffer overflow detected ***: /usr/lib/gcc/x86_64-linux-gnu/9/f951
terminated
f951: internal compiler error: Aborted

when both the module and submodule names are long, and the submodule
declaration is on the form

  submodule (long_module_name) long_submodule_name

The error appears when using both GCC 8.3 and 9.1, and disappears when any of
the two names are shortened.