[plt-scheme] thread shutting down its own custodian

At Sat, 22 May 2010 10:11:35 -0400, Neil Van Dyke wrote:
> This seems to work, but I'm wondering whether there's a race condition 
> (e.g., custodian shutdown code is executed in the thread itself, and 
> that code can kill its own evaluation prematurely),

That's no problem. A thread can reliably shut down its own custodian.