Making squeak hang

Is there something fundamentally wrong with what I am doing, or is this a bug?

1. Set up a new category 'AB-Test' 

2. Subclass RectangleMorph, and add an instance variable 'textReporter'   

RectangleMorph subclass: #AbRectangleMorph

instanceVariableNames: 'textReporterThing'

classVariableNames: ''

poolDictionaries: ''

category: 'AB-Test'

 

3. Create an initialization method in the new class...

initialize

textReporterThing := TextMorph new.

textReporterThing := self bounds asString.

4. Create a new instance and openInWorld

Everything stops responding! I can still close without saving - from the menu - but all UI stuff stops.  Pressing Apple . doesn't produce a break.

System is OSX 10.6

PharoCore1.0rc1

Latest update: #10505

Cheers

Andy