a test

21 Sep 2006 
	########################################################################
	########################################################################
	########################################################################
	########################################################################
	######################............................##############.......#
	######################.##########################.##############.#####.#
	######################.##########################.##############.#####.#
	####..........########.##......................##.##############.#####.#
	####.########.########.##.####################.##.##############.#####.#
	####.########.########.##.####################.##.##############.#####.#
	####.#####....########.##......................##.##############.#####.#
	####.#####.###########.#####.#################.##.##############.#####.#
	####.#####.###########.#####.#################.##.##############.#####.#
	####.#####.###########.#####.#################.##.##############.#####.#
	####.#####.###########.#####.#################.##.##############.#####.#
	####.#####.###########.#####.#################.##.##############.#####.#
	####.#####....########.........................##.##############.#####.#
	####.########.##########################.########.##############.#####.#
	####.########.##########################.########.##############.#####.#
	####.##....##.##############.......#####.#####................##.......#
	####.##.##.##.##############.#####.#####.#####.##############.##.#######
	####.##.##.##.##############.#####.#####.#####.##############.##.#######
	####.##.##.##.......########.#####.#####.#####.##############.##.#######
	####.##.##.########.########.#####.#####.#####.##############.##.#######
	####.##.##.########.########.#####.#####.#####.##############.##.#######
	####.##.##.########.########.#####.#####.#####.............##.##.#######
	####.##.##.########.########.#####.#####.#####.##############.##.#######
	####.##.##.########.########.#####.#####.#####.##############.##.#######
	####....##.......##.########.#####.#####.#####.##############.##.#######
	#######.#####.#####.##############.#####.#####.##############.##.#######
	#######.#####.#####.##############.#####.#####.##############.##.#######
	#######.#####.#####.##############.#####.#####.##############....##....#
	#######.#####.#####.##############.#####.#####.##############.#####.##.#
	#######.#####.#####.##############.#####.#####.##############.#####.##.#
	#######.#####.##....##############................###########.......##.#
	#######.#####.##.#####################################################.#
	#######.#####.##.#####################################################.#
	#######.#####.##.#####################################################.#
	#######.#####.##.#####################################################.#
	#######.#####.##.#####################################################.#
	#######.......##.......................................................#
	########################################################################

statement still active

28 Apr 2006

hmm… thread 1:

#0  0x944d4318 in sqlite3VdbeExec
#1  0x944d4d6c in sqlite3VdbeExec
#2  0x940ed3b4 in -[NSSQLiteConnection _execute]
#3  0x940ed298 in -[NSSQLiteConnection execute]
#4  0x940effc0 in -[NSSQLChannel selectRowsWithFetchRequest:]
#5  0x94124e14 in -[NSSQLCore _newRowsForSelector:withArgument:andLimit:]
#6  0x940ef71c in -[NSSQLCore objectsForFetchRequest:inContext:]
#7  0x940ef5cc in -[NSSQLCore executeRequest:withContext:]
#8  0x940e36f8 in -[NSPersistentStoreCoordinator(_NSInternalMethods) executeRequest:withContext:]
#9  0x940e2b20 in -[NSManagedObjectContext executeFetchRequest:error:]
#10 0x00068af0 in -[GATableDataSource population] at GATableDataSource.m:51
#11 0x00068420 in -[GATableDataSource tableView:objectValueForTableColumn:row:] at GATableDataSource.m:12
#12 0x937d23f4 in -[NSTableView _drawContentsAtRow:column:clipRect:]
#13 0x937d1e78 in -[NSTableView drawRow:clipRect:]
#14 0x937d1c34 in -[NSTableView drawRowIndexes:clipRect:]
#15 0x937d12bc in -[NSTableView drawRect:]
#16 0x93765e78 in -[NSView _drawRect:clip:]
#17 0x93765438 in -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:]
#18 0x93764a00 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#19 0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#20 0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#21 0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#22 0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#23 0x93785664 in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#24 0x9375e674 in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
#25 0x93753968 in -[NSView displayIfNeeded]
#26 0x937537d8 in -[NSWindow displayIfNeeded]
#27 0x93753684 in _handleWindowNeedsDisplay
#28 0x907e3cd8 in blogCFRunLoopDoObservers
#29 0x907e3f78 in blogCFRunLoopRun
#30 0x907e3a18 in CFRunLoopRunSpecific
#31 0x9321d980 in RunCurrentEventLoopInMode
#32 0x9321d014 in ReceiveNextEventCommon
#33 0x9321ce80 in BlockUntilNextEventMatchingListInMode
#34 0x93720104 in _DPSNextEvent
#35 0x9371fdc8 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
#36 0x9371c30c in -[NSApplication run]
#37 0x9380ce68 in NSApplicationMain
#38 0x00011fac in main at main.m:14

thread 2:

#0  0x90005f6c in syscall
#1  0x92991120 in _NSRaiseError
#2  0x940e2ccc in -[NSManagedObjectContext executeFetchRequest:error:]
#3  0x00068af0 in -[GATableDataSource population] at GATableDataSource.m:51
#4  0x00068384 in -[GATableDataSource numberOfRowsInTableView:] at GATableDataSource.m:7
#5  0x937c7178 in -[NSTableView numberOfRows]
#6  0x937c6de0 in -[NSTableView _verifySelectionIsOK]
#7  0x937c6894 in -[NSTableView tile]
#8  0x937c6764 in -[NSTableView _tileAndRedisplayAll]
#9  0x000688ac in -[GATableDataSource update] at GATableDataSource.m:32
#10 0x0003b304 in -[GAThreadController createPopulation] at GAThreadController.m:77
#11 0x0003aa6c in +[GAThreadController createPopulationWithGlob:] at GAThreadController.m:17
#12 0x92976194 in forkThreadForFunction
#13 0x9002ba68 in _pthread_body

It’s pretty clear what’s happening. So it shouldn’t be too difficult to fix. That last problem was bindings-related, and it was happening far too deep inside code that I can’t see, so I finally settled on just scrapping bindings altogether and doing all the table updating & stuff by “hand”.

fixed

28 Apr 2006

yeah, it’s okay now. I seem to’ve broken the persistence of the app, though. Ah well. Not terribly important, now. Almost “there” –€” that is, ready to actually show this thing to other people.

1146242596 53

core data + multithreading =

:(

oh

20 Apr 2006

from the latest debugging session; this is another CFRetain / _NSKeyValueObservationInfoCreateByRemoving -related crash.

Exception raised during posting of notification.  Ignored.  exception: [<NSManagedObject 0x3dcc40> removeObserver:<NSTableBinder 0x37cff0> forKeyPath:@"generation.number"] was sent to an object that has no observers.

CRASH

19 Apr 2006

thread 1:

#0	0x90810820 in CFSetGetValueIfPresent
#1	0x929ff794 in NSHashInsertKnownAbsent
#2	0x93974c28 in -[_NSModelObservingTracker _startObservingModelObject:]
#3	0x93974b68 in -[_NSModelObservingTracker startObservingModelObjectAtReferenceIndex:]
#4	0x93974a5c in -[_NSModelObservingTracker setObservingToModelObjectsRange:]
#5	0x93974870 in -[_NSBindingAdaptor tableView:updateVisibleRowInformation:]
#6	0x937d0f24 in -[NSTableView drawRect:]
#7	0x93765e78 in -[NSView _drawRect:clip:]
#8	0x93765438 in -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:]
#9	0x93764a00 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#10	0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#11	0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#12	0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#13	0x93764fc8 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#14	0x93785664 in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]
#15	0x9375e674 in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
#16	0x93753968 in -[NSView displayIfNeeded]
#17	0x937537d8 in -[NSWindow displayIfNeeded]
#18	0x93753684 in _handleWindowNeedsDisplay
#19	0x907e3cd8 in blogCFRunLoopDoObservers
#20	0x907e3f78 in blogCFRunLoopRun
#21	0x907e3a18 in CFRunLoopRunSpecific
#22	0x9321d980 in RunCurrentEventLoopInMode
#23	0x9321d014 in ReceiveNextEventCommon
#24	0x9321ce80 in BlockUntilNextEventMatchingListInMode
#25	0x93720104 in _DPSNextEvent
#26	0x9371fdc8 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
#27	0x9371c30c in -[NSApplication run]
#28	0x9380ce68 in NSApplicationMain
#29	0x00011fac in main at main.m:13

thread 2:

#0	0x9002c128 in semaphore_wait_signal_trap
#1	0x90030bec in pthread_cond_wait
#2	0x9374d74c in -[NSViewHierarchyLock lockForWriting]
#3	0x9374c458 in -[NSView setFrameSize:]
#4	0x93760e08 in -[NSControl setFrameSize:]
#5	0x937c7e84 in -[NSTableView setFrameSize:]
#6	0x937c6958 in -[NSTableView tile]
#7	0x937c6764 in -[NSTableView _tileAndRedisplayAll]
#8	0x9396e9fc in -[NSTableBinder _updateContent]
#9	0x9396e7e0 in -[NSTableBinder _observeValueForKeyPath:ofObject:context:]
#10	0x9396e5c4 in -[NSTableBinder observeValueForKeyPath:ofObject:change:context:]
#11	0x929fcd08 in -[NSObject(NSKeyValueObservingPrivate) _notifyObserversForKeyPath:change:]
#12	0x93972608 in -[NSController _notifyObserversForKeyPath:change:]
#13	0x93972420 in -[NSArrayController didChangeValuesForArrangedKeys:objectKeys:indexKeys:]
#14	0x93971b24 in -[NSArrayController setContent:]
#15	0x93bfee98 in -[_NSManagedProxy _managedObjectsChangedInContext:]
#16	0x92975ad8 in _nsnote_callback
#17	0x9080b4c4 in blogCFXNotificationPost
#18	0x908035a0 in _CFXNotificationPostNotification
#19	0x9295fee0 in -[NSNotificationCenter postNotificationName:object:userInfo:]
#20	0x940e22cc in -[NSManagedObjectContext(_NSInternalNotificationHandling) _postObjectsDidChangeNotificationWithUserInfo:]
#21	0x940e2244 in -[NSManagedObjectContext(_NSInternalChangeProcessing) _createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:]
#22	0x940e16e8 in -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:]
#23	0x940e2a60 in -[NSManagedObjectContext executeFetchRequest:error:]
#24	0x0003e604 in -[GAThreadController prefForKey:] at GAThreadController.m:327
#25	0x0003ed74 in -[GAThreadController selectObjectThroughTourney:] at GAThreadController.m:407
#26	0x0003d170 in -[GAThreadController runSystem] at GAThreadController.m:179
#27	0x0003bf5c in +[GAThreadController runSystemWithGlob:] at GAThreadController.m:46
#28	0x92976194 in forkThreadForFunction
#29	0x9002ba68 in _pthread_body