gdk_x_error is missing

[Steve Langasek]

I am experiencing routine crashes of gnome-settings-daemon in natty. I am filing a bug against gtk+2.0 instead of gnome-settings-daemon because, in the process of troubleshooting, I receive this error message:

The program 'gnome-settings-daemon' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 102079 error_code 8 request_code 2 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.)

However, the libgdk-x11 library on the system no longer has a gdk_x_error() function defined! I can't very well set a break point on a non-existent symbol. Where has this function disappeared to?

[Sebastien Bacher (seb128)]

you need to install libgtk2.0-0-dbg