Marcel Taeumel uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-mt.1160.mcz

==================== Summary ====================

Name: System-mt.1160
Author: mt
Time: 17 May 2020, 4:49:45.301947 pm
UUID: eec72432-59e2-e643-9fb6-f4be6facc6ef
Ancestors: System-mt.1159

Complements Graphics-mt.433

=============== Diff against System-mt.1159 ===============

Item was changed:
  ----- Method: Project>>imageFormOfSize:depth: (in category 'displaying') -----
  imageFormOfSize: extentPoint depth: d
+ 	
+ 	| currentDisplay temporaryDisplay |
+ 	currentDisplay := Display.
+ 	temporaryDisplay := DisplayScreen extent: extentPoint depth: d.	
+ 	[Display := temporaryDisplay. self invalidate; restore]
+ 		ensure: [Display := currentDisplay].
+ 	^ temporaryDisplay!
- 	| newDisplay |
- 	newDisplay := DisplayScreen extent: extentPoint depth: d.
- 	Display replacedBy: newDisplay do:[self invalidate; restore].
- 	^newDisplay!