Comment #7 on issue 2360 by rydier: nil out locals in a block if readBeforeWritten
http://code.google.com/p/pharo/issues/detail?id=2360
How about starting by writing a test where the problem this addresses is shown, before applying it blindly?
Personally, I have a hard time figuring out what the code this is supposed to fix compilation of would look like just from glancing at the source...
