[Bug fortran/69524] [6 Regression] Compiler segfaults on simple testcase

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69524

--- Comment #3 from janus at gcc dot gnu.org ---
Here is a slightly reduced test case:

module A
  interface
    module subroutine A1
    end
  end interface
contains
  subroutine A1
  end
end

It's still invalid, but gives less errors with gfortran-5.