Comment 5 for bug 432677

I agree, obviously Xorg should ideally never freeze, but that isn't really possible. This is most likely a bug in how Eclipse debugger (or SWT or JFace or whatever) is interacting with X, and if I would have to guess, I'd say it is Eclipse's fault. Just my hunch though, obviously I don't have any hard evidence for believing that yet.

There is no way you can make Xorg never freeze. I'll give you a grossly oversimplified example. Let's say you ask X to draw a window for you. Now, it may be Xorg's responsibility to give you a valid, error-free window. But now let's say you ask for a million windows. It may not be in the scope of Xorg to say "No you have too many windows." Rather, that is the fault of a buggy application asking for too many windows to be drawn, thus freezing X.