RE: Finalizers etcetera

| (a) It was the first mention of MVars that I found in the docs. | (b) I only really mentioned it because the type sigs are wrong. Hmm. That's not very clever. | Doesn't it block if another thread manages to sneak a putMVar into | the middle? Maybe I should read your "Awkward Squad" paper to find | out if this matters. Yes it does block if another thread sneaks in a put. If it matters, you'd better code up a more robust abstraction (using MVars of course). S