A new version of Tools was added to project The Inbox:
http://source.squeak.org/inbox/Tools-fbs.221.mcz

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

Name: Tools-fbs.221
Author: fbs
Time: 31 March 2010, 10:50:58.687 pm
UUID: da949c92-70b6-e447-8327-524502fe452c
Ancestors: Tools-fbs.220

Bug from ancestor: selectorListIndex can be nil, if the selectorList is empty.

=============== Diff against Tools-fbs.220 ===============

Item was changed:
  ----- Method: MessageNames>>selectedClassOrMetaClass (in category 'class list') -----
  selectedClassOrMetaClass
  	"Answer the currently selected class (or metaclass)."
  	messageListIndex > 0 ifTrue: [
  		^ self setClassAndSelectorIn: [:c :s | ^c]].
+ 	(selectorListIndex isNil not and: [selectorListIndex > 0]) ifTrue: [^Smalltalk classNamed: (self selectorList at: selectorListIndex)].
- 	selectorListIndex > 0 ifTrue: [^Smalltalk classNamed: (self selectorList at: selectorListIndex)].
  	
  	^ nil.
  	!