From Fedora Project Wiki

Identifying your problem area

To be able to identify if it's Thunderbird or Thunderbird extensions you need to disable all Thunderbird extension you have installed and enabled. You do so by starting Thunderbird, go to "Tools", select "Add-ons" and disable all extensions listed there.

Quit Thunderbird and start it again. Recreate whatever you did that caused the problem your experiencing and see if it persists.

If the problem persisted go to "Debugging Thunderbird".

If the problem did not persist enable each extension and try to recreate the problem then disable the extension you just enabled again until you come across which extension is causing the problem then go to "Debugging Thunderbird Extensions".

Information to include in your report

All bug reports

In all cases, the following should be mentioned and attached to your bug report:

  • What version of Thunderbird your using.
You can determine which version of Thunderbird you have installed by starting Thunderbird go to "Help" and choose "About" or open up a terminal window and run:
$ rpm -q thunderbird

  • The exact command-line used if an command was used to start Thunderbird.
  • Screen shot of Thunderbird window if an graphical error occurs or Thunderbird shows an error.
  • List of Thunderbird extension you have installed.

Thunderbird problems

No additional/specific step need to be included.

Debugging Thunderbird

Always review and sanitize your logs before submitting them. Often when turning on debug logging or when using debuggers in application they will show/store sensitive information such as passwords etc. simply remove or replace the sensitive string with xxxx in the logs before submitting them.

Install Thunderbird debug package.

$ su -c 'debuginfo-install thunderbird'

Find Thunderbirds process ID ( PID )

$ ps -C thunderbird-bin

Sample output:

$ ps -C thunderbird-bin
  PID TTY          TIME CMD
  22924 ?        01:15:06 thunderbird-bin

Attache GNU Project Debugger to Thunderbirds PID

$ gdb thunderbird-bin 22924

If gdb complaints about "Missing separate debuginfos" then type "quit" in the gdb shell and do a copy paste of the debuginfo-install entry and install it the same way as above then and rerun the gdb thunbird-bin PID command.

 Sample error entry:

Missing separate debuginfos, use: debuginfo-install PackageKit-gtk-module-0.4.9-1.fc11.x86_64 audiofile-0.2.6-10.fc11.x86_64 elfutils-libelf-0.142-1.fc11.x86_64 esound-libs-0.2.41-2.fc11.x86_64 gecko-mediaplayer-0.9.8-1.fc11.x86_64 gvfs-1.2.3-12.fc11.x86_64 libXScrnSaver-1.1.3-2.fc11.x86_64 libXext- libgnomeui-2.24.1-1.fc11.x86_64 libical-0.43-4.fc11.x86_64 libtool-ltdl-2.2.6-11.fc11.1.x86_64 libvorbis-1.2.0-8.fc11.x86_64 libxml2-2.7.5-1.fc11.x86_64 sqlite-3.6.12-3.fc11.x86_64 thunderbird-enigmail-0.97a-0.1.cvs20090721.fc11.x86_64

Enable logging to a file in gdb.

From the gdb shell type `set logging on'

Sample ouput... 
(gdb) set logging on
Copying output to gdb.txt.
Current language:  auto; currently minimal

Then type cont and redo the steps in Thunderbird that caused the error your experiencing.

Sample output...
(gdb) cont

After you have recreated the steps that causes the error your experiencing press CTRL-C in the gdb shell and type thread apply all bt.

Sample output...
Program received signal SIGINT, Interrupt.
0x0000003846ad50d3 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:87
87	  int result = INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, timeout);
Current language:  auto; currently minimal
(gdb) thread apply all bt

Thread 19 (Thread 0x7fffdacff910 (LWP 20935)):
Output trunkated.... 

---Type <return> to continue, or q <return> to quit--

Press return until you are returned to the gdb shell then type quit and exit the debugger.

Sample output...
Current language:  auto; currently minimal
(gdb) quit
The program is running.  Quit anyway (and kill it)? (y or n) y

Attache gdb.txt to your bugzilla report..