https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125369
--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <[email protected]>: https://gcc.gnu.org/g:11a1cf805aac7b7db21bd2ea6cc22a69f5aa92f9 commit r17-595-g11a1cf805aac7b7db21bd2ea6cc22a69f5aa92f9 Author: Jonathan Wakely <[email protected]> Date: Mon May 18 15:44:21 2026 +0100 libstdc++: Make chrono::parse fail for bad %z [PR125369] The chrono parsing code failed to check for errors when parsing input to match %z. The expected input is [+-]hh[mm] but if we read less than two valid digits for the hh or mm parts we didn't set failbit in the stream, and used the -1 error values returned for each bad digit in the offset value. This resulted in a "successful" parse that produced a value like -11h or -11min for the time zone offset. libstdc++-v3/ChangeLog: PR libstdc++/125369 * include/bits/chrono_io.h (__detail::_Parser::operator()): Check for errors when parsing digits for a %z format. * testsuite/std/time/parse/125369.cc: New test. Reviewed-by: Tomasz KamiÅski <[email protected]>
