Seems a deadlock on a futex
strace: Process 6518 attached 0.000000 futex(0x3ff8c017840, FUTEX_WAIT_PRIVATE, 2, NULL <detached ...>
Seems a deadlock on a futex
strace: Process 6518 attached 7840, FUTEX_WAIT_PRIVATE, 2, NULL
0.000000 futex(0x3ff8c01
<detached ...>