This appears to be the same as upstream bug #4573, which was fixed in 2.51.
** Bug watch added: Transmission Trac #4573 http://trac.transmissionbt.com/ticket/4573 ** Also affects: transmission via http://trac.transmissionbt.com/ticket/4573 Importance: Unknown Status: Unknown ** Changed in: transmission (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to transmission in Ubuntu. https://bugs.launchpad.net/bugs/973869 Title: transmission-gtk crashed with SIGABRT in g_assertion_message() Status in Transmission: Unknown Status in “transmission” package in Ubuntu: Fix Released Bug description: Just opened Transmisson via Firefox with a magnet link. It asked me to accept the conditions, and then it crashed. ProblemType: Crash DistroRelease: Ubuntu 12.04 Package: transmission-gtk 2.50-0ubuntu2 ProcVersionSignature: Ubuntu 3.2.0-22.35-generic-pae 3.2.14 Uname: Linux 3.2.0-22-generic-pae i686 ApportVersion: 2.0-0ubuntu4 Architecture: i386 Date: Wed Apr 4 20:20:45 2012 ExecutablePath: /usr/bin/transmission-gtk InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328) ProcCmdline: transmission-gtk magnet:?xt=urn:btih:9059386e543c53466863be7dac33aa4788dccec6&dn=TinyXP+Rev09+-+eXPerience&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Ftracker.publicbt.com%3A80&tr=udp%3A%2F%2Ftracker.ccc.de%3A80 ProcEnviron: TERM=unknown PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash Signal: 6 SourcePackage: transmission Title: transmission-gtk crashed with SIGABRT in raise() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/transmission/+bug/973869/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

