A new version of Morphic was added to project The Inbox:
http://source.squeak.org/inbox/Morphic-ct.1531.mcz

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

Name: Morphic-ct.1531
Author: ct
Time: 20 September 2019, 8:46:54.327726 pm
UUID: 9ba3d907-10d4-524a-9e97-cd66a530f0ef
Ancestors: Morphic-mt.1526

Fix a bug in MorphicProject>>#applyUserInterfaceTheme

While working with many Projects during the latest weeks, I often noticed DNUs when changing the UI theme. Apparently UserInterfaceTheme>>#apply asks ALL objects in memory to apply the theme, so if a project was recently closed and not yet gc'ed, I got an error.

=============== Diff against Morphic-mt.1526 ===============

Item was changed:
  ----- Method: MorphicProject>>canApplyUserInterfaceTheme (in category 'updating') -----
  canApplyUserInterfaceTheme
  
+ 	^ world notNil!
- 	^ true!