[Bug libstdc++/110974] format out of bounds read on invalid format string "{:{}."

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110974

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

https://gcc.gnu.org/g:ecfd8c7ffecf9e8f851c996ec149fbda7ef202f5

commit r14-3136-gecfd8c7ffecf9e8f851c996ec149fbda7ef202f5
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Thu Aug 10 23:15:29 2023 +0100

    libstdc++: Fix out-of-bounds read in format string "{:{}." [PR110974]

    libstdc++-v3/ChangeLog:

            PR libstdc++/110974
            * include/std/format (_Spec::_S_parse_width_or_precision): Check
            for empty range before dereferencing iterator.
            * testsuite/std/format/string.cc: Check for expected exception.
            Fix expected exception message in test_pr110862() and actually
            call it.