[Bug fortran/96381] gfc_find_vtab can use a character type typespec as a derived type (causing invalid access)

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96381

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Harald Anlauf
<anl...@gcc.gnu.org>:

https://gcc.gnu.org/g:2bfcf6011a6cdce0439e3d1b94bcb5fcf078f4c2

commit r9-9151-g2bfcf6011a6cdce0439e3d1b94bcb5fcf078f4c2
Author: Harald Anlauf <anl...@gmx.de>
Date:   Fri Jan 1 18:55:41 2021 +0100

    PR fortran/96381 - invalid read in gfc_find_derived_vtab

    An invalid declaration of a CLASS instance can lead to an internal state
    with inconsistent attributes during parsing that needs to be handled with
    sufficient care when processing subsequent statements.  Avoid a lookup of
    the vtab entry for such cases.

    gcc/fortran/ChangeLog:

            * class.c (gfc_find_vtab): Add check on attribute is_class.

    (cherry picked from commit d816b0c144d15e6570eb5b124b9f3ccbe3d40082)