[Bug tree-optimization/99074] gcc 8 and above is crashing with dynamic_cast<>() on null pointer with optimization level -O1 and above

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99074

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <mse...@gcc.gnu.org>:

https://gcc.gnu.org/g:6d134ca4b963706f31251f061fc180e517b32546

commit r11-7350-g6d134ca4b963706f31251f061fc180e517b32546
Author: Martin Sebor <mse...@redhat.com>
Date:   Tue Feb 23 14:09:00 2021 -0700

    PR c++/99074 - crash in dynamic_cast<>() on null pointer

    libstdc++-v3/ChangeLog:

            PR c++/99074
            * libsupc++/dyncast.cc (__dynamic_cast): Return null when
            first argument is null.

    gcc/testsuite/ChangeLog:

            PR c++/99074
            * g++.dg/warn/Wnonnull11.C: New test.