Similar to legacy/trac#24315. If I enable the sandbox on my system, I get killed with: ``` (Sandbox) Caught a bad syscall attempt (syscall openat) tor(+0x1a439a)[0x55d0af97d39a] /lib64/libpthread.so.0(open64+0x4b)[0x7f74ed0951cb] /lib64/libpthread.so.0(open64+0x4b)[0x7f74ed0951cb] tor(tor_open_cloexec+0x40)[0x55d0af963440] tor(start_writing_to_file+0x17a)[0x55d0af976e7a] tor(+0x19df5b)[0x55d0af976f5b] tor(+0x19e0a8)[0x55d0af9770a8] tor(or_state_save+0x15b)[0x55d0af8954cb] tor(+0x52e3b)[0x55d0af82be3b] /usr/lib64/libevent-2.1.so.6(+0x236fa)[0x7f74eddf06fa] /usr/lib64/libevent-2.1.so.6(event_base_loop+0x57f)[0x7f74eddf164f] tor(do_main_loop+0x254)[0x55d0af82cb54] tor(tor_run_main+0x1025)[0x55d0af82ef15] tor(tor_main+0x3a)[0x55d0af8276ba] tor(main+0x19)[0x55d0af827449] /lib64/libc.so.6(__libc_start_main+0xe7)[0x7f74eccdb9f7] tor(_start+0x2a)[0x55d0af82749a] ``` strace: ``` write(1, "(Sandbox) Caught a bad syscall a"..., 48(Sandbox) Caught a bad syscall attempt (syscall ) = 48 write(1, "openat", 6openat) = 6 ```