[Bug fortran/91586] [9/10 Regression] ICE in gfc_find_derived_vtab, at fortran/class.c:2245

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91586

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Author: burnus
Date: Fri Oct 18 12:04:31 2019
New Revision: 277153

URL: https://gcc.gnu.org/viewcvs?rev=277153&root=gcc&view=rev
Log:
Fortran] PR91586 Fix ICE on invalid code with CLASS

        gcc/fortran/
        PR fortran/91586
        * class.c (gfc_find_derived_vtab): Return NULL
        instead of deref'ing NULL pointer.

        gcc/testsuite/
        PR fortran/91586
        * gfortran.dg/class_71.f90: New.


Added:
    trunk/gcc/testsuite/gfortran.dg/class_71.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/class.c
    trunk/gcc/testsuite/ChangeLog