Using the last 6715.image and trying to load a .jpg via drag an d drop or
via FileList, I see this walckback.

I know I should do a Mantis report, and do this for showing student the
minimal form of reporting bugs.

Edgsr

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Error: a primitive has failed
19 January 2006 8:57:10 am

VM: Mac OS - a SmalltalkImage
Image: Squeak3.9alpha [latest update: #6715]

SecurityManager state:
Restricted: false
FileAccess: true
SocketAccess: true
Working Dir Discovery:Users:admin:SqueakDevelop:Squeak3.9alpha Ä
Trusted Dir Discovery:Users:admin:SqueakDevelop:Squeak3.9alpha Ä
Untrusted Dir foobar:tooBar:forSqueak:bogus

JPEGReadWriter2(Object)>>error:
	Receiver: a JPEGReadWriter2
	Arguments and temporary variables: 
		aString: 	'a primitive has failed'
	Receiver's instance variables: 
		stream: 	MultiByteFileStream: 'Discovery:Users:admin:Desktop:99piecetemplate.jpg...etc...

JPEGReadWriter2(Object)>>primitiveFailed
	Receiver: a JPEGReadWriter2
	Arguments and temporary variables: 

	Receiver's instance variables: 
		stream: 	MultiByteFileStream: 'Discovery:Users:admin:Desktop:99piecetemplate.jpg...etc...

JPEGReadWriter2>>primJPEGReadImage:fromByteArray:onForm:doDithering:errorMgr:
	Receiver: a JPEGReadWriter2
	Arguments and temporary variables: 
		aJPEGDecompressStruct: 	a ByteArray(4 239 17 80 0 71 162 192 0 0 0 0 0 0 0 0 0 0...etc...
		source: 	a ByteArray(255 216 255 224 0 16 74 70 73 70 0 1 1 1 0 72 0 72 0 0 255 ...etc...
		form: 	Form(360x270x16)
		ditherFlag: 	true
		aJPEGErrorMgr2Struct: 	a ByteArray(0 7 194 48 0 9 157 80 0 9 157 0 0 9 157 240 0...etc...
	Receiver's instance variables: 
		stream: 	MultiByteFileStream: 'Discovery:Users:admin:Desktop:99piecetemplate.jpg...etc...

JPEGReadWriter2>>nextImageSuggestedDepth:
	Receiver: a JPEGReadWriter2
	Arguments and temporary variables: 
		depth: 	16
		bytes: 	a ByteArray(255 216 255 224 0 16 74 70 73 70 0 1 1 1 0 72 0 72 0 0 255 2...etc...
		width: 	360
		height: 	270
		form: 	Form(360x270x16)
		jpegDecompressStruct: 	a ByteArray(4 239 17 80 0 71 162 192 0 0 0 0 0 0 0 0 0 0 ...etc...
		jpegErrorMgr2Struct: 	a ByteArray(0 7 194 48 0 9 157 80 0 9 157 0 0 9 157 240 0 ...etc...
		depthToUse: 	16
	Receiver's instance variables: 
		stream: 	MultiByteFileStream: 'Discovery:Users:admin:Desktop:99piecetemplate.jpg...etc...


--- The full stack ---
JPEGReadWriter2(Object)>>error:
JPEGReadWriter2(Object)>>primitiveFailed
JPEGReadWriter2>>primJPEGReadImage:fromByteArray:onForm:doDithering:errorMgr:
JPEGReadWriter2>>nextImageSuggestedDepth:
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
JPEGReadWriter2>>nextImage
[] in ImageReadWriter class>>formFromStream: {[form := reader nextImage.  reader close]}
BlockContext>>ensure:
CursorWithMask(Cursor)>>showWhile:
ImageReadWriter class>>formFromStream:
Form class>>fromBinaryStream:
Form class>>openImageInWindow:
SimpleServiceEntry>>performServiceFor:
PluggableButtonMorph>>performAction
[] in PluggableButtonMorph>>mouseUp: {[:m | (m containsPoint: evt cursorPoint)   ifTrue: [m performAction]]}
Array(SequenceableCollection)>>do:
PluggableButtonMorph>>mouseUp:
PluggableButtonMorph(Morph)>>handleMouseUp:
MouseButtonEvent>>sentTo:
PluggableButtonMorph(Morph)>>handleEvent:
PluggableButtonMorph(Morph)>>handleFocusEvent:
[] in HandMorph>>sendFocusEvent:to:clear: {[ActiveHand := self.  ActiveEvent := anEvent.  result := focusHolder     han...]}
[] in PasteUpMorph>>becomeActiveDuring: {[aBlock value]}
BlockContext>>on:do:
PasteUpMorph>>becomeActiveDuring:
HandMorph>>sendFocusEvent:to:clear:
HandMorph>>sendEvent:focus:clear:
HandMorph>>sendMouseEvent:
HandMorph>>handleEvent:
HandMorph>>processEvents
[] in WorldState>>doOneCycleNowFor: {[:h |  ActiveHand := h.  h processEvents.  capturingGesture := capturingGest...]}
Array(SequenceableCollection)>>do:
WorldState>>handsDo:
WorldState>>doOneCycleNowFor:
WorldState>>doOneCycleFor:
PasteUpMorph>>doOneCycle
[] in Project class>>spawnNewProcess {[[World doOneCycle.  Processor yield.  false] whileFalse.  nil]}
[] in BlockContext>>newProcess {[self value.  Processor terminateActive]}