=======================================================================
=== 13.5.0-2
=== Currently Held Locks
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 0x7f0179b4d700 LWP:26458 (do_monitor           started at [28915] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 28886 do_monitor &monlock 0x7f018ce444a0 (1)
	/usr/sbin/asterisk(__ast_bt_get_addresses+0x1d) [0x46e14d]
	/usr/sbin/asterisk(__ast_pthread_mutex_lock+0xc9) [0x541a6e]
	/usr/lib/asterisk/modules/chan_sip.so(+0x9837a) [0x7f018cbf037a]
	/usr/sbin/asterisk() [0x60bef2]
	/lib/x86_64-linux-gnu/libpthread.so.0(+0x6b50) [0x7f01a4cc5b50]
	/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7f01a404795d]
=== -------------------------------------------------------------------
===
=== Thread ID: 0x7f0177327700 LWP:309 (pbx_thread           started at [ 6796] pbx.c ast_pbx_start())
=== ---> Waiting for Lock #0 (chan_sip.c): MUTEX 28904 restart_monitor &monlock 0x7f018ce444a0 (1)
	/usr/sbin/asterisk(__ast_bt_get_addresses+0x1d) [0x46e14d]
	/usr/sbin/asterisk(__ast_pthread_mutex_lock+0xc9) [0x541a6e]
	/usr/lib/asterisk/modules/chan_sip.so(+0x98476) [0x7f018cbf0476]
	/usr/lib/asterisk/modules/chan_sip.so(+0x9d111) [0x7f018cbf5111]
	/usr/sbin/asterisk(ast_request+0x3b7) [0x4c3e31]
	/usr/lib/asterisk/modules/app_dial.so(+0xceef) [0x7f01896e0eef]
	/usr/lib/asterisk/modules/app_dial.so(+0x10c62) [0x7f01896e4c62]
	/usr/sbin/asterisk(pbx_exec+0x12b) [0x577738]
	/usr/sbin/asterisk() [0x582178]
	/usr/sbin/asterisk(ast_spawn_extension+0x64) [0x585118]
	/usr/sbin/asterisk() [0x586743]
	/usr/sbin/asterisk() [0x588048]
	/usr/sbin/asterisk() [0x60bef2]
	/lib/x86_64-linux-gnu/libpthread.so.0(+0x6b50) [0x7f01a4cc5b50]
	/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7f01a404795d]
=== --- ---> Locked Here: chan_sip.c line 28886 (do_monitor)
=== -------------------------------------------------------------------
===
=======================================================================

Unable to disable core size resource limit: Operation not permitted
Asterisk ending (0).