Marcel Taeumel uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System-mt.1028.mcz
==================== Summary ====================
Name: System-mt.1028 Author: mt Time: 24 May 2018, 10:35:51.133621 am UUID: e67895c1-7fda-a446-a702-5757e36441ec Ancestors: System-mt.1027
Adds clean-up code for distinguished null-(class/method)-references.
=============== Diff against System-mt.1027 ===============
Item was added: + ----- Method: ClassReference class>>cleanUp: (in category 'class initialization') ----- + cleanUp: aggressive + + aggressive ifTrue: [InvalidReference := nil].!
Item was added: + ----- Method: MethodReference class>>cleanUp: (in category 'class initialization') ----- + cleanUp: aggressive + + aggressive ifTrue: [InvalidReference := nil].!
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