Fun. Wine 10.20 added icu.dll, without implementing any function in it. MSVC STL optionally uses icu.dll, and if found calls functions in it. Wine just terminates for any called function.

This is "fixed" by Wine 11.0-rc1 by not shipping broken icu.dll again, however they threaten to do the same stupid thing in 11.1 again. See https://gitlab.winehq.org/wine/wine/-/commit/ff0d64407266f7b9780f05845dd34c58c11ecae7.

See also https://bugs.winehq.org/show_bug.cgi?id=59046 and https://gitlab.winehq.org/wine/wine/-/commit/1209e096626fff862e81b477335e84d565cd263f#note_123850.

This probably not only triggers on OpenMPT exit, but also when doing any std::chrono::duration_cast with std::chrono::system_time using std::chrono::zoned_time. I currently do not remember which code paths would trigger that.

A temporary workaround is winecfg and switch icu, icuin and icuuc to "Native" (see my comment https://gitlab.archlinux.org/archlinux/packaging/packages/wine-staging/-/issues/12#note_368876).

Upgrading 10.20 to 11.0-rc1 does not help by itself, because the broken bogus icu.dll gets installed into WINEPREFIX by Wine 1.20, and Wine 11,0-rc1 does not remove it when updating the WINEPREFIX. So, updating Wine will only help if you also start with a fresh WINEPREFIX. This is a mess.

Another code path that triggers the crash is saving an IT or MPTM file.

Fixed in

• r24578 (trunk)
• r24579 1.32.05.02

See also https://bugs.winehq.org/show_bug.cgi?id=53354#c7.