[Bug c++/113834] [14 Regression] internal compiler error: in tree_to_shwi, at tree.cc:6461

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113834

--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>:

https://gcc.gnu.org/g:f29f7f86935e29786bf9f976ec99d7639b381b14

commit r14-8904-gf29f7f86935e29786bf9f976ec99d7639b381b14
Author: Marek Polacek <pola...@redhat.com>
Date:   Fri Feb 9 12:03:50 2024 -0500

    c++: fix ICE with __type_pack_element [PR113834]

    Here we crash on this invalid code because we seem to infinitely recurse
    and end up with __type_pack_element with index that doesn't
tree_fits_shwi_p
    which then crashes on tree_to_shwi.

    Thanks to Jakub for suggesting a nicer fix than my original one.

            PR c++/113834

    gcc/cp/ChangeLog:

            * semantics.cc (finish_type_pack_element): Perform range checking
            before tree_to_shwi.

    gcc/testsuite/ChangeLog:

            * g++.dg/ext/type_pack_element4.C: New test.