https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105127
--- Comment #2 from Sam Darwin <samuel.d.darwin at gmail dot com> --- yes, reported: https://cygwin.com/pipermail/cygwin/2022-January/250693.html I don't know where the bug originates, in gcc or cygwin. If an expert in gcc could submit a fix to cygwin or vice versa.