Marcel Taeumel uploaded a new version of Collections to project The Trunk: http://source.squeak.org/trunk/Collections-mt.876.mcz
==================== Summary ====================
Name: Collections-mt.876 Author: mt Time: 26 February 2020, 5:24:00.015527 pm UUID: 282a3821-8c7b-974f-b426-2cc481055eab Ancestors: Collections-ul.875
Prepare 5.3rc2 --- Fixes #isEmpty for weak collections.
=============== Diff against Collections-ul.875 ===============
Item was changed: ----- Method: HashedCollection>>isEmpty (in category 'testing') ----- isEmpty + "For non-weak collections, we can use the tally to speed up the empty check. For weak collections, we must use the traditional way because the tally is unreliable. Also see #size vs. #slowSize." + + ^ array class isWeak + ifFalse: [ tally = 0 ] + ifTrue: [ super isEmpty ]! - ^tally = 0!