[Bug libstdc++/124854] std::chrono::time_zone emits a brief incorrect sys_info at certain zone-line boundaries where zic.c's writezone merges a rule firing with the boundary

[alvaro.begue at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124854

--- Comment #2 from Álvaro Begué <alvaro.begue at gmail dot com> ---
Patch posted to gcc-patches:
https://gcc.gnu.org/pipermail/gcc-patches/2026-April/714877.html