Bert Freudenberg uploaded a new version of Collections to project The Trunk:
http://source.squeak.org/trunk/Collections-bf.512.mcz==================== Summary ====================
Name: Collections-bf.512
Author: bf
Time: 9 April 2013, 1:38:23.935 pm
UUID: a45042c6-8fc0-4653-b996-22b40cc825e8
Ancestors: Collections-tpr.511
Debugging should *not* modify a stream.
=============== Diff against Collections-tpr.511 ===============
Item was changed:
----- Method: Stream>>printOn: (in category 'printing') -----
printOn: stream
super printOn: stream.
+ "
stream space.
self contents printOn: stream.
+
+ NOTE: some subclasses actually read from the stream to return its contents.
+ To not modify the state we must *not* send contents here.
+ "!
- !