Eliot Miranda uploaded a new version of ToolBuilder-Kernel to project The Trunk:
http://source.squeak.org/trunk/ToolBuilder-Kernel-eem.63.mcz

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

Name: ToolBuilder-Kernel-eem.63
Author: eem
Time: 6 October 2014, 12:46:57.26 pm
UUID: 2a80d908-62c0-4502-92a2-cd3a15f90f3c
Ancestors: ToolBuilder-Kernel-mt.62

The method that opens a debugger does need to
answer the window created, as its comment says.

=============== Diff against ToolBuilder-Kernel-mt.62 ===============

Item was changed:
  ----- Method: ToolBuilder>>openDebugger:label: (in category 'opening') -----
  openDebugger: aSpec label: aString
  	"Build and open a debugger from the given spec, labeling it appropriately.
  	Answer the widget opened. Subclasses can override this
  	method if opening a debugger has specific requirements
  	different from opening other widgets."
   
+ 	^self open: aSpec label: aString
- 	self open: aSpec label: aString
  !