Karl Ramberg uploaded a new version of Morphic to project The Trunk:
http://source.squeak.org/trunk/Morphic-kfr.1424.mcz

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

Name: Morphic-kfr.1424
Author: kfr
Time: 3 May 2018, 8:09:18.476229 pm
UUID: 4e43a771-b83b-9a48-9633-6665d351ae79
Ancestors: Morphic-kfr.1423

Guard against textStyle = nil

=============== Diff against Morphic-kfr.1423 ===============

Item was changed:
  ----- Method: TextMorph>>fixUponLoad:seg: (in category 'objects from disk') -----
  fixUponLoad: aProject seg: anImageSegment
  	"We are in an old project that is being loaded from disk. Fix up conventions that have changed."
  
+ 	| substituteFont includesSubstituteFont |
- 	| substituteFont |
  	substituteFont := aProject projectParameters at: #substitutedFont ifAbsent: [#none].
+ 	includesSubstituteFont := false.
+ 	self textStyle ifNotNil:  [includesSubstituteFont := self textStyle fontArray includes: substituteFont].
+ 	(substituteFont ~~ #none and: [includesSubstituteFont])
- 	(substituteFont ~~ #none and: [self textStyle fontArray includes: substituteFont])
  			ifTrue: [ self fit ].
  
  	^ super fixUponLoad: aProject seg: anImageSegment!