since my libc is musl, tar is using builtin argp implementation, which will pass NULL as msgid to dgettext without additional checks.
but according to https://www.gnu.org/software/gettext/manual/html_node/Interface-to-gettext.html, passing NULL to gettext is undefined. and, musl chose to crash.. could you please check if msgid is NULL before passing it to dgettext? the problem code is located at argp-help.c. related links: https://www.openwall.com/lists/musl/2017/03/24/10. -- Best regards, xhe