To reproduce it

ColorPickerMorph new openInWorld
Bring the halo and select the delete pink with cross halo.

Stef


From: ducasse at iam.unibe.ch
To: squeak-dev at lists.squeakfoundation.org
Subject: [BUG]UndefinedObject(Object)>>doesNotUnderstand:

here insert explanation of what you were doing, suspect changes you've 
made and so forth.

19 July 2003 8:11:08 pm

VM: Mac OS - Squeak3.5alpha of '7 January 2003' [latest update: #5169] 
Squeak VM 3.5.0b4
Image: Squeak3.5 [latest update: #5180]

UndefinedObject(Object)>>doesNotUnderstand:
	Receiver: nil
	Arguments and temporary variables:
		aMessage: 	a Message with selector: #numArgs and arguments: #()
	Receiver's instance variables:
nil

ColorPickerMorph>>argumentsWith:
	Receiver: a ColorPickerMorph(3299)
	Arguments and temporary variables:
		aColor: 	nil
		nArgs: 	nil
	Receiver's instance variables:
		bounds: 	319 at 18 corner: 509 at 78
		owner: 	a PasteUpMorph(1622) [world]
		submorphs: 	#(an EllipseMorph(1446))
		fullBounds: 	319 at 18 corner: 509 at 78
		color: 	(Color r: 0.0 g: 0.548 b: 0.806)
		extension: 	a MorphExtension (3376) [other:  (rotationCenter -> 
0.5 at 0.5) (clipSu...etc...
		originalForm: 	Form(190x60x16)
		rotationStyle: 	#normal
		scalePoint: 	1.0 at 1.0
		framesToDwell: 	1
		rotatedForm: 	Form(190x60x16)
		selectedColor: 	(TranslucentColor r: 1.0 g: 1.0 b: 1.0 alpha: 0.89)
		sourceHand: 	nil
		deleteOnMouseUp: 	false
		updateContinuously: 	true
		target: 	nil
		selector: 	nil
		argument: 	nil
		originalColor: 	nil
		theSelectorDisplayMorph: 	nil
		command: 	nil
		isModal: 	nil
		clickedTranslucency: 	false

ColorPickerMorph>>delete
	Receiver: a ColorPickerMorph(3299)
	Arguments and temporary variables:

	Receiver's instance variables:
		bounds: 	319 at 18 corner: 509 at 78
		owner: 	a PasteUpMorph(1622) [world]
		submorphs: 	#(an EllipseMorph(1446))
		fullBounds: 	319 at 18 corner: 509 at 78
		color: 	(Color r: 0.0 g: 0.548 b: 0.806)
		extension: 	a MorphExtension (3376) [other:  (rotationCenter -> 
0.5 at 0.5) (clipSu...etc...
		originalForm: 	Form(190x60x16)
		rotationStyle: 	#normal
		scalePoint: 	1.0 at 1.0
		framesToDwell: 	1
		rotatedForm: 	Form(190x60x16)
		selectedColor: 	(TranslucentColor r: 1.0 g: 1.0 b: 1.0 alpha: 0.89)
		sourceHand: 	nil
		deleteOnMouseUp: 	false
		updateContinuously: 	true
		target: 	nil
		selector: 	nil
		argument: 	nil
		originalColor: 	nil
		theSelectorDisplayMorph: 	nil
		command: 	nil
		isModal: 	nil
		clickedTranslucency: 	false

ColorPickerMorph(Morph)>>slideToTrash:
	Receiver: a ColorPickerMorph(3299)
	Arguments and temporary variables:
		evt: 	[310 at 9 mouseUp 151124]
		aForm: 	Form(190x60x16)
		trash: 	a TrashCanMorph
		startPoint: 	319 at 18
		endPoint: 	35 at 535
		morphToSlide: 	a ColorPickerMorph(3299)
		aMorph: 	a TrashCanMorph
	Receiver's instance variables:
		bounds: 	319 at 18 corner: 509 at 78
		owner: 	a PasteUpMorph(1622) [world]
		submorphs: 	#(an EllipseMorph(1446))
		fullBounds: 	319 at 18 corner: 509 at 78
		color: 	(Color r: 0.0 g: 0.548 b: 0.806)
		extension: 	a MorphExtension (3376) [other:  (rotationCenter -> 
0.5 at 0.5) (clipSu...etc...
		originalForm: 	Form(190x60x16)
		rotationStyle: 	#normal
		scalePoint: 	1.0 at 1.0
		framesToDwell: 	1
		rotatedForm: 	Form(190x60x16)
		selectedColor: 	(TranslucentColor r: 1.0 g: 1.0 b: 1.0 alpha: 0.89)
		sourceHand: 	nil
		deleteOnMouseUp: 	false
		updateContinuously: 	true
		target: 	nil
		selector: 	nil
		argument: 	nil
		originalColor: 	nil
		theSelectorDisplayMorph: 	nil
		command: 	nil
		isModal: 	nil
		clickedTranslucency: 	false


--- The full stack ---
UndefinedObject(Object)>>doesNotUnderstand:
ColorPickerMorph>>argumentsWith:
ColorPickerMorph>>delete
ColorPickerMorph(Morph)>>slideToTrash:
  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HaloMorph>>maybeDismiss:with:
EventHandler>>send:to:withEvent:fromMorph:
EventHandler>>mouseUp:fromMorph:
EllipseMorph(Morph)>>mouseUp:
EllipseMorph(Morph)>>handleMouseUp:
MouseButtonEvent>>sentTo:
EllipseMorph(Morph)>>handleEvent:
EllipseMorph(Morph)>>handleFocusEvent:
[] in HandMorph>>sendFocusEvent:to:clear:
PasteUpMorph>>becomeActiveDuring:
HandMorph>>sendFocusEvent:to:clear:
HandMorph>>sendEvent:focus:clear:
HandMorph>>sendMouseEvent:
HandMorph>>handleEvent:
HandMorph>>processEvents
[] in WorldState>>doOneCycleNowFor:
Array(SequenceableCollection)>>do:
WorldState>>handsDo:
WorldState>>doOneCycleNowFor:
WorldState>>doOneCycleFor:
PasteUpMorph>>doOneCycle
[] in Project class>>spawnNewProcess
[] in BlockContext>>newProcess