crash in event_queue_insert in thread1

[Biiaru]

Crash log attached.

[smmalis]

Looking at the crash report, it seems to me that the crash was caused by libevent.

[Biiaru]

Similar Thread 1 appearance. Segfault on start, r7795.

[Biiaru]

Disregard last upload. Description applies to this crash report.

[charles]

This occurs in a couple of those attachments:

49 	Thread 1 Crashed:
50 	0   org.m0k.transmission      0x00092112 event_queue_insert + 96
51 	1   org.m0k.transmission      0x000905b5 kq_dispatch + 304
52 	2   org.m0k.transmission      0x0009352a event_base_loop + 795
53 	3   org.m0k.transmission      0x00093ae4 event_dispatch + 35
54 	4   org.m0k.transmission      0x0007494a libeventThreadFunc + 183
55 	5   libSystem.B.dylib         0x94b3c095 _pthread_start + 321
56 	6   libSystem.B.dylib         0x94b3bf52 thread_start + 34

[charles]

​http://forum.transmissionbt.com/viewtopic.php?f=4&t=6934&start=0 has a few more of these, with this one twice:

Thread 1 Crashed:
0   org.m0k.transmission   0x00092112 event_queue_insert + 96
1   org.m0k.transmission   0x000905b5 kq_dispatch + 304
2   org.m0k.transmission   0x0009352a event_base_loop + 795
3   org.m0k.transmission   0x00093ae4 event_dispatch + 35
4   org.m0k.transmission   0x0007494a libeventThreadFunc + 183
5   libSystem.B.dylib      0x900d8095 _pthread_start + 321
6   libSystem.B.dylib      0x900d7f52 thread_start + 34

And this one once:

Thread 1 Crashed:
0   org.m0k.transmission    0x0009215b event_queue_insert + 169
1   org.m0k.transmission    0x000905b5 kq_dispatch + 304
2   org.m0k.transmission    0x0009352a event_base_loop + 795
3   org.m0k.transmission    0x00093ae4 event_dispatch + 35
4   org.m0k.transmission    0x0007494a libeventThreadFunc + 183
5   libSystem.B.dylib       0x900d8095 _pthread_start + 321
6   libSystem.B.dylib       0x900d7f52 thread_start + 34

[Biiaru]

crash on start r7797, looks similar but not exactly the same

[charles]

from persept, who said it did not happen at startup but rather while T was running in the background:

Thread 1 Crashed:
0   org.m0k.transmission   0x000a6e51 event_queue_insert + 120
1   org.m0k.transmission   0x000a6678 event_active + 110
2   org.m0k.transmission   0x000a31c1 kq_dispatch + 691
3   org.m0k.transmission   0x000a5ca5 event_base_loop + 389
4   org.m0k.transmission   0x000a5b1a event_loop + 44
5   org.m0k.transmission   0x000a5954 event_dispatch + 24
6   org.m0k.transmission   0x00084fdc libeventThreadFunc (trevent.c:253)
7   org.m0k.transmission   0x00074227 ThreadFunc + 34 (platform.c:112)
8   libSystem.B.dylib      0x93507095 _pthread_start + 321
9   libSystem.B.dylib      0x93506f52 thread_start + 34

[charles]

From ryoujin:

0   org.m0k.transmission   0x00092112 event_queue_insert + 96
1   org.m0k.transmission   0x000905b5 kq_dispatch + 304
2   org.m0k.transmission   0x0009352a event_base_loop + 795
3   org.m0k.transmission   0x00093ae4 event_dispatch + 35
4   org.m0k.transmission   0x0007494a libeventThreadFunc + 183
5   libSystem.B.dylib      0x900d8095 _pthread_start + 321
6   libSystem.B.dylib      0x900d7f52 thread_start + 34

[charles]

I have no idea why this crash is happening, but from what Biiaru and others have said it sounds like it was added relatively recently... I haven't even seen it happen once, so maybe it has something to do with the way the Mac client interacts with libtransmission.

Regardless, I think the thing to do now is for you to start working backwards through the nightlies to figure out when this bug was introduced. You will probably want to coordinate your efforts...

[charles]

Possible fix in trunk in r7824

[charles]

xref: this is being experienced by ​KingJulian and ​lizardflix in the forums.

[charles]

related: charles * r7828 libtransmission/web.c: (trunk libT) #1748: judging from Biiaru's testing yesterday after I left, the problem is somewhere in web.c. Let's start digging in there by adding in some cruel assertions...

[charles]

Looks like KingJulian? is ​already hitting those new assertions in r7828

[charles]

A typical report:

2/5/09 3:18:36 PM [0x0-0x10010].org.m0k.transmission[99] [15:18:36.995] Transmission 1.42+ (7829) Assertion "mcode == CURLM_OK" failed at /var/tmp/pea/svn.transmissionbt.com/trunk/libtransmission/web.c:321.  (curl_multi_socket_action() failed: 5 (invalid socket argument))  Please report this bug at <http://trac.transmissionbt.com/newticket>; Thank you.
2/5/09 3:18:41 PM com.apple.launchd[62] ([0x0-0x10010].org.m0k.transmission[99]) Exited abnormally: Abort trap 

[charles]

2/5/09 3:18:36 PM [0x0-0x10010].org.m0k.transmission[99] [15:18:36.995] Transmission 1.42+ (7829) Assertion "mcode == CURLM_OK" failed at /var/tmp/pea/svn.transmissionbt.com/trunk/libtransmission/web.c:321. (curl_multi_socket_action() failed: 5 (invalid socket argument)) Please report this bug at <​http://trac.transmissionbt.com/newticket>; Thank you. 2/5/09 3:18:41 PM com.apple.launchd[62] ([0x0-0x10010].org.m0k.transmission[99]) Exited abnormally: Abort trap

[Biiaru]

I believe this is fixed as of r7866. I'll reopen if I do experience it again.

[charles]

xref: #1844