[racket-dev] another strange compilation bug

Today, I've started seeing output from 'mzc' like the following:

[samth at punge:~/sw/plt/collects/tests/typed-scheme (master) plt] mzc -kv main.rkt
mzc v5.0.0.2 [3m], Copyright (c) 2004-2010 PLT Scheme Inc.
"main.rkt":
  making "/home/samth/sw/plt/collects/tests/typed-scheme/main.rkt"
  making "/home/samth/sw/plt/collects/tests/typed-scheme/main.rkt"
  making "/home/samth/sw/plt/collects/tests/typed-scheme/main.rkt"
  making "/home/samth/sw/plt/collects/tests/typed-scheme/main.rkt"
  making "/home/samth/sw/plt/collects/typed-scheme/private/prims.rkt"
  making "/home/samth/sw/plt/collects/typed-scheme/private/prims.rkt"
  making "/home/samth/sw/plt/collects/typed-scheme/private/prims.rkt"
  making "/home/samth/sw/plt/collects/typed-scheme/private/prims.rkt"
  making "/home/samth/sw/plt/collects/typed-scheme/private/prims.rkt"

I don't have any idea why it might be happening, but it isn't breaking
anything for me.  I haven't come up with a reliable reproduction
recipe either, but I haven't tried very hard, so if one is needed,
just ask.
-- 
sam th
samth at ccs.neu.edu