In version 5.7.2 the issue may still exist. I got some crash connected to uac module. Here is my backtrace:
(gdb) bt #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x00007fae9a2d0859 in __GI_abort () at abort.c:79 #2 0x00005614ad79afd8 in qm_debug_check_frag (qm=0x7fae78e77000, f=0x7fae79805028, file=0x7fae77c8c134 "uac: uac_send.c", line=860, efile=0x5614ad936f99 "core/mem/q_malloc.c", eline=511) at core/mem/q_malloc.c:129 #3 0x00005614ad79f7c1 in qm_free (qmp=0x7fae78e77000, p=0x7fae79805060, file=0x7fae77c8c134 "uac: uac_send.c", func=0x7fae77c8cf10 <__func__.15157> "uac_send_tm_callback", line=860, mname=0x7fae77c8c014 "uac") at core/mem/q_malloc.c:511 #4 0x00005614ad7ab410 in qm_shm_free (qmp=0x7fae78e77000, p=0x7fae79805060, file=0x7fae77c8c134 "uac: uac_send.c", func=0x7fae77c8cf10 <__func__.15157> "uac_send_tm_callback", line=860, mname=0x7fae77c8c014 "uac") at core/mem/q_malloc.c:1350 #5 0x00007fae77c3686b in uac_send_tm_callback (t=0x7fae797dcf40, type=131072, ps=0x7fff8bd990d0) at uac_send.c:860 #6 0x00007fae783abc27 in run_trans_callbacks_internal (cb_lst=0x7fae797dcfe8, type=131072, trans=0x7fae797dcf40, params=0x7fff8bd990d0) at t_hooks.c:241 #7 0x00007fae783abd1e in run_trans_callbacks (type=131072, trans=0x7fae797dcf40, req=0x0, rpl=0x0, code=0) at t_hooks.c:261 #8 0x00007fae782bd8cb in free_cell_helper (dead_cell=0x7fae797dcf40, silent=0, fname=0x7fae783e9f62 "timer.c", fline=653) at h_table.c:165 #9 0x00007fae7837649c in wait_handler (ti=724701450, wait_tl=0x7fae797dcff8, data=0x7fae797dcf40) at timer.c:653 #10 0x00005614ad50be68 in timer_list_expire (t=724701450, h=0x7fae78ef5d18, slow_l=0x7fae78ef95e0, slow_mark=33641) at core/timer.c:857 #11 0x00005614ad50c3a7 in timer_handler () at core/timer.c:922 #12 0x00005614ad50c8d5 in timer_main () at core/timer.c:961 #13 0x00005614ad45fbf3 in main_loop () at main.c:1833 #14 0x00005614ad46ae93 in main (argc=14, argv=0x7fff8bd99b48) at main.c:3086
Any idea about this?