Sources to go with xserver-xfree86-dbg

[Igor Khavkine <k_igor_k@lycos.com>]

Hi, I've got a strange problem with my X server. It is crashed by
starting certain applications, but not when they are started from a
separate terminal.

Before submitting a bug, I'd like to get more info on the crash. That's
why I installed xserver-xfree86-dbg. My question is about debugging with
the X server sources. What is the best way to install the sources to go
along with this -dbg package?

Thanks in advance.

Igor

P.S.: Please CC me since I'm not on the list.