'squeak':

http://ftp.squeak.org/updates/4279EnvironmentsFix-hg.cs

"Change Set:		environmentsFix-hg
Date:			21 August 2001
Author:			Henrik Gedenryd

A small consolidation in Dictionary that prevents exceptions from
crashing an image that has been converted to use Environments."!

http://lists.squeakfoundation.org/pipermail/squeak-dev/2001-August/027201.html

Ken
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