Every now and then, I get a report from someone saying this assert check fails in on_stun_request_complete during ICE connectivity checks. This is pjsip 2.1 sources. Searching through the archives of this list, I see some reports going back to 2008 as well as ticket # 591 suggesting this issue was fixed. http://trac.pjsip.org/repos/ticket/591 Unfortunately, no logs from my user. What does the assert attempt to validate? What can I do to debug further or help the pjsip developers track this down? jrs Assertion failed: (tdata == check->tdata), function on_stun_request_complete, file ../src/pjnath/ice_session.c, line 2185. (lldb) bt * thread #24: tid = 0x3f03, 0x39c61350 libsystem_kernel.dylib`__pthread_kill + 8, stop reason = signal SIGABRT frame #0: 0x39c61350 libsystem_kernel.dylib`__pthread_kill + 8 frame #1: 0x39bd8122 libsystem_c.dylib`pthread_kill + 58 frame #2: 0x39c14972 libsystem_c.dylib`abort + 94 frame #3: 0x39bf54d0 libsystem_c.dylib`__assert_rtn + 180 frame #4: 0x002acdd0 x`on_stun_request_complete + 1320 frame #5: 0x002b38d2 x`stun_tsx_on_complete + 494 frame #6: 0x002b552e x`retransmit_timer_callback + 90 frame #7: 0x002a6aa6 x`pj_timer_heap_poll + 114 frame #8: 0x002946d4 x`CIceSession::WorkerThreadImpl() + 100 frame #9: 0x0029471c x`CIceSession::WorkerThread(void*) + 8 frame #10: 0x002a0d9c x`thread_main + 64 frame #11: 0x39bba310 libsystem_c.dylib`_pthread_start + 308 frame #12: 0x39bba1d8 libsystem_c.dylib`thread_start + 8 (lldb) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130619/136c4493/attachment-0001.html>