Nicolas Cellier uploaded a new version of Graphics to project The Trunk:
http://source.squeak.org/trunk/Graphics-ct.412.mcz

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

Name: Graphics-ct.412
Author: ct
Time: 9 September 2019, 4:48:55.947903 pm
UUID: 21d5e2ab-2c2b-ff44-ba1d-d53788673c81
Ancestors: Graphics-mt.410

Fix a bug in ColorForm conversion

Override #collectColors:, as ColorMap has its own data format which is not compatible to Form.

=============== Diff against Graphics-mt.410 ===============

Item was added:
+ ----- Method: ColorForm>>collectColors: (in category 'converting') -----
+ collectColors: aBlock
+ 
+ 	^ (ColorForm extent: self extent depth: self depth bits: self bits)
+ 		colors: (self colors collect: aBlock);
+ 		yourself!