I've been using awesome for about a year now, and never had it crash. Xmonad, however, while never crashing, would cause my Xorg process to eventually use all available RAM after several days of use without restarting.
(Example of software without a test suite: Emacs. No tests anywhere; not for the byte compiler, not for the memory allocator, nowhere. I am amazed it works at all.)
Either way, we'd certainly love to know more, since this has never been reported before.