Comment 16 for bug 536367

That's why I sometimes will just run my games in a separate X session (but launched from a debugger in my primary X session) so I don't have to actually stop them to do other stuff (send emails, etc.), I just switch CTRL-ALT-F8/F7. But mostly, it helps if it crashes while in full-screen mode. I just run:

X :3 -ac -once

Then I when I debug, I set the environment variable DISPLAY=:3 and I have my debugger in one X session and the game in another (you may want to run a window manager in the second X session however).

IMHO, it's better that you reported it than not :)