I cannot reproduce it. I'll try anyway to make a change that might fix this.
** Changed in: online-accounts-signon-ui Status: New => In Progress -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to signon-ui in Ubuntu. https://bugs.launchpad.net/bugs/1040580 Title: signon-ui assert failure: *** glibc detected *** /usr/bin/signon-ui: invalid fastbin entry (free): 0x000000000234c3c0 *** Status in Online Accounts: Sign-on UI: In Progress Status in “signon-ui” package in Ubuntu: Confirmed Bug description: No idea what happened. ProblemType: Crash DistroRelease: Ubuntu 12.10 Package: signon-ui 0.6-0ubuntu1 ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2 Uname: Linux 3.5.0-11-generic x86_64 ApportVersion: 2.5.1-0ubuntu1 Architecture: amd64 AssertionMessage: *** glibc detected *** /usr/bin/signon-ui: invalid fastbin entry (free): 0x000000000234c3c0 *** CheckboxSubmission: 2f383a1679e8525d7196eb2518a1921f CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f Date: Thu Aug 23 12:44:11 2012 ExecutablePath: /usr/bin/signon-ui InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110817) ProcCmdline: /usr/bin/signon-ui Signal: 6 SourcePackage: signon-ui StacktraceTop: __libc_message (do_abort=2, fmt=0x7f6e6c474fd0 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201 malloc_printerr (action=3, str=0x7f6e6c471f99 "invalid fastbin entry (free)", ptr=<optimized out>) at malloc.c:5007 QString::free(QString::Data*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 ?? () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 QDBusMessage::~QDBusMessage() () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 Title: signon-ui assert failure: *** glibc detected *** /usr/bin/signon-ui: invalid fastbin entry (free): 0x000000000234c3c0 *** UpgradeStatus: Upgraded to quantal on 2012-06-27 (57 days ago) UserGroups: adm admin audio cdrom dialout lpadmin plugdev sambashare To manage notifications about this bug go to: https://bugs.launchpad.net/online-accounts-signon-ui/+bug/1040580/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp