Segfault on Arch Linux x86_64
This is the coredump generated when executing as root:
systemd-coredump[8623]: Process 8601 (kfu) of user 0 dumped core.
Stack trace of thread 8601:
#0 0x0000000008776e8a n/a (kfu)
#1 0x000000000805c24a n/a (kfu)
#2 0x000000000805d0e1 n/a (kfu)
#3 0x0000000008051ec0 n/a (kfu)
#4 0x0000000008052369 n/a (kfu)
#5 0x0000000008051c1b n/a (kfu)
#6 0x00000000f7739b41 __libc_start_main (libc.so.6)
#7 0x0000000008051b31 n/a (kfu)
Maybe, uploading the source instead of a single binary should work. Please, fix it as soon as you can.