https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88450
--- Comment #13 from Bence Szabó <sbence92 at gmail dot com> --- ICE still occurs with current trunk (r267728) patched with gcc9-pr88331.patch from PR88331. r266345 seems to give quite a hard time for cygwin / mingw targets, might be worth reverting as the gcc 9 release is comming up.