Marcel Taeumel uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-mt.1326.mcz

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

Name: System-mt.1326
Author: mt
Time: 16 March 2022, 3:09:31.524608 pm
UUID: 4abf5e25-04e4-ef45-bff2-fe94bc13c45a
Ancestors: System-mt.1325

Warn the user if they try to install a font as code font that cannot display latin-1. Complements TrueType-mt.90

=============== Diff against System-mt.1325 ===============

Item was changed:
  ----- Method: UserInterfaceTheme class>>setFont:to: (in category 'tools - fonts') -----
  setFont: symbolicName to: aFont
  	"Set symbolicName to aFont in all known UI themes. If aFont is a TrueType font, transform all themes into TTC-based ones."
  
  	(symbolicName = #standardSystemFont and: [aFont isTTCFont])
  		ifTrue: [self makeAllTTCBased].
+ 	symbolicName = #standardCodeFont
+ 		ifTrue: [ "Source code is mostly single-byte strings. Verify that this font can render those so that we can implement fast paths. See #displayByteString:on:from:to:at:kern:baselineY:."
+ 			(aFont minCodePoint <= 16r20 "space" and: [aFont maxCodePoint >= 16rFF])
+ 				ifFalse: [self notify: 'The standard code font should support latin-1 encoding but this one does not!! For performance reasons, there is no support for fallback fonts in single-byte strings. Please choose a different font as code font.' translated]].
  
  	self allThemes do: [:uit |
  		uit setFont: symbolicName to: aFont].!