Hi, He X wrote on 2018-12-22: > according to > https://www.gnu.org/software/gettext/manual/html_node/Interface-to-gettext.html, > passing NULL to gettext is undefined.
Likewise the LI18NUX 2000 specification (p. 39) says "The msgid argument is a null-terminated string." And likewise the LSB 3.0 https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/baselib-dgettext.html > since my libc is musl, tar is using builtin argp implementation, which will > pass NULL as msgid to dgettext without additional checks. > > > could you please check if msgid is NULL before passing it to dgettext? the > problem code is located at argp-help.c. I don't see which dgettext invocation in argp-help.c is the one that needs the NULL check. Can you please provide a stack trace (from gdb, from a 'tar' program built with CFLAGS="-ggdb") of the crash? Bruno