lottanzb segfaults every few minutes on natty

[Blown2bits]

Binary package hint: lottanzb

From Kernel log:
May 18 21:15:47 zeke kernel: [38599.750532] lottanzb[7204]: segfault at 3c ip 00007f6efd16ba0e sp 00007fff913a4140 error 4 in libpango-1.0.so.0.2800.4[7f6efd15e000+47000]
May 18 21:18:09 zeke kernel: [38741.041145] lottanzb[7287]: segfault at 40 ip 00007f18d15ecd86 sp 00007fffa398a900 error 4 in libpango-1.0.so.0.2800.4[7f18d15cc000+47000]
May 18 21:23:56 zeke kernel: [39087.591791] lottanzb[7919]: segfault at 40 ip 00007f3a39d01d86 sp 00007fff3f011f40 error 4 in libpango-1.0.so.0.2800.4[7f3a39ce1000+47000]
May 18 21:53:57 zeke kernel: [40883.079030] lottanzb[10236]: segfault at 40 ip 00007fe09a387d86 sp 00007fff6bea05b0 error 4 in libpango-1.0.so.0.2800.4[7fe09a367000+47000]
May 18 21:57:46 zeke kernel: [41111.578851] lottanzb[10747]: segfault at 1c20460 ip 0000000001c20460 sp 00007fff096d3188 error 15
May 18 21:59:19 zeke kernel: [41204.618593] lottanzb[11097]: segfault at 40 ip 00007fe544fc8d86 sp 00007fff85faa520 error 4 in libpango-1.0.so.0.2800.4[7fe544fa8000+47000]

Except for second-to-last, most seem to be error 4's in libpango at offset 0xd86.

I recently upgraded from Lucid in which lottanzb was stable with hellanzb. However, now, it won't make it through a single nzb.

SABnzbd still runs and continues to download NZB.

.sbnzbd/sabnzbd.error.log is empty.
.sabnzbd/sabnzbd.log does not show any errors and does not show anything indicating a shutdown (because it is still running, I guess):
2011-05-18 21:50:53,732::INFO::[_cplogging:55] [18/May/2011:21:50:53] ENGINE Bus STARTING
2011-05-18 21:50:53,734::INFO::[_cplogging:55] [18/May/2011:21:50:53] ENGINE Started monitor thread '_TimeoutMonitor'.
2011-05-18 21:50:53,835::INFO::[_cplogging:55] [18/May/2011:21:50:53] ENGINE Serving on 127.0.0.1:8080
2011-05-18 21:50:53,836::INFO::[_cplogging:55] [18/May/2011:21:50:53] ENGINE Bus STARTED

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: lottanzb 0.6-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-9.43-generic 2.6.38.4
Uname: Linux 2.6.38-9-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed May 18 21:55:04 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: lottanzb
UpgradeStatus: Upgraded to natty on 2011-05-02 (17 days ago)

[Severin H (severinh)]

Thanks a lot for taking the time to report this bug. You are perfectly right. I'm experiencing these frequent crashes myself and I know how annoying they are.

I've already spent quite some time trying to figure out what is done incorrectly in LottaNZB that causes these crashes in the low-level libraries. The most likely reason is that it is some sort of multi-threading issue, which is particularly hard to debug.

I'll definitively try harder to fix this bug. Any help is welcome.