FogBugz (Case [Issue]11545) _Inbox - class instance variables misbehaving

A FogBugz case was opened by bencoman.

Case ID:      11545
Title:        class instance variables misbehaving
Status:       Work Needed
Category:     Bug
Project:      _Inbox
Area:         Not Spam
Priority:     4 - Would be nice
Milestone:    Later
Assigned To:  Everyone

URL:          https://pharo.fogbugz.com/default.asp?11545

When adding a duplicate class instance variable the error message 'Unknown variable: class' is confusing (well it confused me for about an hour as I was preparing to report this as a different bug based on my misunderstanding.) To reproduce...

Object subclass: #MyTest1
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'MyTest'

MyTest1 subclass: #MyTest2
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'MyTest'

MyTest1 class
instanceVariableNames: 'MyVar'

MyTest2 class
instanceVariableNames: 'MyVar'

produces error 'Unknown variable' as shown in attached PNG file.  Something like 'Duplicate variable' would be more suitable.

In addition, you get the same error if you try to redefine a class-instance-variable, or add a second one. To reproduce...

Object subclass: #MyTest3
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'MyTest'

MyTest3 class
instanceVariableNames: 'MyVar'

MyTest3 class
instanceVariableNames: 'MyVar2'


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