Well, depends on your definition of "literally hang." It does indeed literally hang (i.e. system becomes unusable, activity monitor impossible to open) for minutes on end if you're not careful; a fact I was somewhat dismayed to discover.

But it's rare enough that I just don't care much. The performance in other areas is too good to gripe about "if I run make -j8 for an hour, it'll hang for a few minutes."