Re: crash when resizing window

FROM : Mike Abdullah
DATE : Mon May 12 18:20:37 2008

Looks to me like you're releasing (and then deallocating) an object in 
the outline view without first informing the view that it's gone. It 
is very important to remember that outline views do NOT retain their 
items; that is the responsibility of your data source. Running with 
NSZombieEnabled may help further.

Mike.

On 12 May 2008, at 15:18, Mitchell Livingston wrote:

> Hello,
>
> I have code where i manually reorder an outline view, and when it is 
> reordered it automatically resizes to fit all the items. A crash 
> consistently happens when I move a subitem from one group to another 
> (in other words, when I drag a row so that it is originally in one 
> expandable row and is put in another). I have spent a day trying to 
> track this down with no luck, and it works fine when I rearrange 
> rows in their own subgroup (as in they stay under the same 
> expandable row).
>
> Exception Type:  EXC_BAD_ACCESS (SIGBUS)
> Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000020
> Crashed Thread:  0
>
> Thread 0 Crashed:
> 0  libobjc.A.dylib                   0x95e806e8 objc_msgSend + 24
> 1  com.apple.AppKit                 0x9020d58b -[NSOutlineView 
> _dataSourceIsItemExpandable:] + 125
> 2  com.apple.AppKit                 0x901b605f -[NSOutlineView 
> _drawDropHighlight] + 138
> 3  com.apple.AppKit                 0x901b4f9b -[NSTableView 
> drawRect:] + 4552
> 4  com.apple.AppKit                 0x90244bbe -[NSView 
> _drawRect:clip:] + 3765
> 5  com.apple.AppKit                 0x90243751 -[NSView 
> _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1050
> 6  com.apple.AppKit                 0x90243aa5 -[NSView 
> _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1902
> 7  com.apple.AppKit                 0x90243aa5 -[NSView 
> _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1902
> 8  com.apple.AppKit                 0x90243aa5 -[NSView 
> _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1902
> 9  com.apple.AppKit                 0x90243aa5 -[NSView 
> _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1902
> 10  com.apple.AppKit                 0x902420b4 -[NSView 
> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> :] + 759
> 11  com.apple.AppKit                 0x902419f7 -[NSThemeFrame 
> _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView
> :] + 306
> 12  com.apple.AppKit                 0x9023e52d -[NSView 
> _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] 
> + 3090
> 13  com.apple.AppKit                 0x9017ef09 -[NSView 
> displayIfNeeded] + 933
> 14  com.apple.AppKit                 0x9023162f -[NSWindow 
> _setFrameCommon:display:stashSize:] + 2031
> 15  com.apple.AppKit                 0x90230e3a -[NSWindow 
> setFrame:display:] + 78
> 16  com.apple.AppKit                 0x902834a5 
> _NSMoveHelperTimerCallBack + 1330
> 17  com.apple.CoreFoundation         0x91e24b5e CFRunLoopRunSpecific + 
> 4494
> 18  com.apple.CoreFoundation         0x91e24d18 CFRunLoopRunInMode + 88
> 19  com.apple.AppKit                 0x903dfcdf -[NSMoveHelper 
> _doAnimation] + 889
> 20  com.apple.AppKit                 0x9045ec93 -[NSMoveHelper 
> _resizeWindow:toFrame:display:] + 407
> 21  com.apple.AppKit                 0x9026bf6c -[NSWindow 
> setFrame:display:animate:] + 1038
> 22  org.m0k.transmission             0x00016ef6 -[Controller 
> setWindowSizeToFit] + 293 (Controller.m:3874)
> 23  org.m0k.transmission             0x0000cd95 -[Controller 
> applyFilter:] + 3082 (Controller.m:2041)
> 24  org.m0k.transmission             0x00010448 -[Controller 
> outlineView:acceptDrop:item:childIndex:] + 1253 (Controller.m:2696)
> 25  com.apple.AppKit                 0x90682d90 -[NSOutlineView 
> performDragOperation:] + 242
> 26  com.apple.AppKit                 0x9044ff15 NSCoreDragReceiveProc 
> + 1411
> 27  com.apple.HIServices             0x909c155c DoDropMessage + 97
> 28  com.apple.HIServices             0x909c14d2 SendDropMessage + 41
> 29  com.apple.HIServices             0x909be83a DragInApplication + 492
> 30  com.apple.HIServices             0x909bd2de CoreDragStartDragging 
> + 539
> 31  com.apple.AppKit                 0x9044dd9d -[NSCoreDragManager 
> _dragUntilMouseUp:accepted:] + 597
> 32  com.apple.AppKit                 0x9044ccc2 -[NSCoreDragManager 
> dragImage:fromWindow:at:offset:event:pasteboard:source:slideBack:] + 
> 1452
> 33  com.apple.AppKit                 0x9044c70c -[NSWindow(NSDrag) 
> dragImage:at:offset:event:pasteboard:source:slideBack:] + 127
> 34  com.apple.AppKit                 0x90682822 -[NSOutlineView 
> dragImage:at:offset:event:pasteboard:source:slideBack:] + 195
> 35  com.apple.AppKit                 0x9044c354 -[NSTableView 
> _doImageDragUsingRowsWithIndexes:event:pasteboard:source:slideBack:] 
> + 762
> 36  com.apple.AppKit                 0x90294390 -[NSTableView 
> _performDragFromMouseDown:] + 718
> 37  com.apple.AppKit                 0x902922ea -[NSTableView 
> mouseDown:] + 741
> 38  com.apple.AppKit                 0x902a3edf -[NSOutlineView 
> mouseDown:] + 611
> 39  org.m0k.transmission             0x0001e278 -[TorrentTableView 
> mouseDown:] + 515 (TorrentTableView.m:399)
> 40  com.apple.AppKit                 0x9024aac3 -[NSWindow sendEvent:] 
> + 5381
> 41  com.apple.AppKit                 0x90217714 -[NSApplication 
> sendEvent:] + 2780
> 42  com.apple.AppKit                 0x901750f9 -[NSApplication run] + 
> 847
> 43  com.apple.AppKit                 0x9014230a NSApplicationMain + 574
> 44  org.m0k.transmission             0x0000238b main + 181 (main.m:38)
> 45  org.m0k.transmission             0x000022bb _start + 209
> 46  org.m0k.transmission             0x000021e9 start + 41
>
> If more information is needed, or if you need to see the code, 
> please let me know.
>
> Cheers,
> Mitch
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