Scalac hangs while checking exhaustiveness of pattern match

I ran into an issue in a project of mine where creating a tuple and pattern matching against it results in the compiler hanging and eventually crashing with an OOME.  I've created a reproducible test case and posted it to github: https://github.com/davewhittaker/pattern_match_bug. A Gist of a stack trace taken during the compile is here: https://gist.github.com/1627701.  I see there are a good amount of open bugs related to pattern matching so I'd like to get confirmation that this isn't already known about before creating a new one.
Thanks,Dave