pause torrents causes crash

[richard]

qbittorrent 2.10 amd64 ubuntu
paused several torrents - program crashed
can't fin any logfile info to forward

[Mariusz Fik (fisiu)]

I can't reproduce.

fisiu@pendrak:~> qbittorrent --version
qBittorrent v2.1.0rc6

[Christophe Dumez (hydr0g3n)]

When qBittorrent crashes and if it was run from a terminal, it will print out a stack trace.

Can you reproduce the problem easily?

It is probably a crash in libtorrent but without a stack trace, it is impossible to know exactly.

[richard (jordan1193r)]

I did try to reproduce it
but was not successful
and you are probably right
the problem has appeared before
back as far as 2.03
I didn't report it before
I will continue to try to reproduce it
it has usually been a case of pausing
some torrents so other might finish faster
we are currently managing over 100 torrents
and there hasn't been much trouble
I really like qibittorrent, want to help it
thanks

[Christophe Dumez (hydr0g3n)]

Feel free to reopen if it happens again with recent versions.

[MikeJJ (mrmikejj)]

Hi,
I've been getting this crash a few times now, when it crashes when pausing a few torrents at the same time. Version 2.8.4

This is the output when running it from a terminal on amd64

Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt. You must
reimplement QApplication::notify() and catch all exceptions there.

terminate called after throwing an instance of 'libtorrent::libtorrent_exception'
  what(): invalid torrent handle used

*************************************************************
Catching SIGABRT, please report a bug at http://bug.qbittorrent.org
and provide the following backtrace:
qBittorrent version: v2.8.4
stack trace:
  /lib/x86_64-linux-gnu/libc.so.6 : ()+0x32480 [0x7f7d82665480]
  /lib/x86_64-linux-gnu/libc.so.6 : gsignal()+0x35 [0x7f7d82665405]
  /lib/x86_64-linux-gnu/libc.so.6 : abort()+0x180 [0x7f7d82668680]
  /usr/lib/x86_64-linux-gnu/libstdc++.so.6 : __gnu_cxx::__verbose_terminate_handler()+0x11d [0x7f7d82f0de8d]
  /usr/lib/x86_64-linux-gnu/libstdc++.so.6 : ()+0xbd036 [0x7f7d82f0c036]
  /usr/lib/x86_64-linux-gnu/libstdc++.so.6 : ()+0xbd063 [0x7f7d82f0c063]
  /usr/lib/x86_64-linux-gnu/libstdc++.so.6 : __cxa_rethrow()+0x46 [0x7f7d82f0c1a6]
  /usr/lib/libQtCore.so.4 : QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)+0x1d6 [0x7f7d832ca4f6]
  /usr/lib/libQtCore.so.4 : QCoreApplication::exec()+0x87 [0x7f7d832ce567]
  qbittorrent : main()+0xd2f [0x47fa3f]
  /lib/x86_64-linux-gnu/libc.so.6 : __libc_start_main()+0xfd [0x7f7d82651ead]
  qbittorrent() [0x488b71]
Aborted

[MikeJJ (mrmikejj)]

Sidenote, also get it sometimes when a torrent completes or is removed. The crash first started when the 100's of "Tracker Authentication" login windows appeared, and could be related to them.