Just a heads up since I came across this while debugging that the --sync command line option has been deprecated [1] so to provide meaningful backtrace to maintainers in atleast F15 and onwards you will need to set "GDK_SYNCHRONIZE" environmental to "1" which will make GDK make all X requests synchronously.
To simplify this a bit when you see msg like this ( which is deprecated )..
($Application:19057): Gdk-WARNING **: The program '$Application' received an X Window System error. This probably reflects a bug in the program. The error was 'BadWindow (invalid Window parameter)'. (Details: serial 473436 error_code 3 request_code 42 minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)
You will now need to do..
$ su -c 'debuginfo-install $Application'
$ GDK_SYNCHRONIZE=1 gdb -q $Application Reading symbols from /usr/bin/$Application...Reading symbols from /usr/lib/debug/usr/bin/$Application.debug...done. done. (gdb) set logging on Copying output to gdb.txt. (gdb) run Starting program: /usr/bin/$application [Thread debugging using libthread_db enabled] <$foo error> (gdb) thread apply all bt full (gdb) quit
or the gdb cli $magic
$ gdb -q $Application --ex "set logging on" --ex "r"
And attach gdb,txt to your report.
What once was but is no more is...
$ gdb -q $Application Reading symbols from /usr/bin/$Application...Reading symbols from /usr/lib/debug/usr/bin/$Application.debug...done. done. (gdb) set logging on Copying output to gdb.txt. (gdb) run --sync Starting program: /usr/bin/$application [Thread debugging using libthread_db enabled] <$foo error> (gdb) thread apply all bt full (gdb) quit
or the gdb cli $magic
$ gdb $Application --ex "set logging on" --ex "r --sync"
JBG
1.http://mail.gnome.org/archives/commits-list/2010-December/msg07793.html