I have a program which runs fine, except for the days it does not.
I then creates an exception like: "*** -[NSMetadataQuery resultAtIndex:]: index
(454) out of bounds (0)".
The culprit is always NSMetadataQuery resultAtIndex:.
The problem: when I start to debug, this exception soon goes away. When I give
up, it will reappear sooner or later.
The backtrace is not always the same, but always there is an NSArrayController,
NSTableBinder, NSTableView, NSArrayController again, until NSMetadataQuery
resultAtIndex: with an invalid index.
(See below for one example).
Any ideas what to do? How to make this bug raise it's ugly head? How to fix it?
26/08/2013 07:03:43.817 Digital Librarian[12418]: (
0 CoreFoundation 0x00007fff8b9dcb06
__exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8d4443f0
objc_exception_throw + 43
2 CoreFoundation 0x00007fff8b9dc8dc
+[NSException raise:format:] + 204
3 Foundation 0x00007fff8ed46f99
-[NSMetadataQuery resultAtIndex:] + 184
4 AppKit 0x00007fff91aaef9c
-[_NSModelObservingTracker stopObservingModelObjectAtReferenceIndex:] + 161
5 AppKit 0x00007fff91aaed5d
-[_NSModelObservingTracker stopObservingModelObjectsAtReferenceIndexes:] + 188
6 AppKit 0x00007fff91a7180a
-[NSArrayController
_selectObjectsAtIndexesNoCopy:avoidsEmptySelection:sendObserverNotifications:forceUpdate:]
+ 416
7 AppKit 0x00007fff91b98589
-[NSArrayController
_modifySelectedObjects:useExistingIndexesAsStartingPoint:avoidsEmptySelection:addOrRemove:sendObserverNotifications:forceUpdate:]
+ 976
8 AppKit 0x00007fff918bbd61
-[NSArrayController setSelectedObjects:] + 47
9 Digital Librarian 0x000000010000d819
-[TableHandler setIndices:] + 73
10 Digital Librarian 0x000000010000dfb7
-[TableHandler(TableHandlerPrivate) tableViewSelectionDidChange:] + 1863
11 CoreFoundation 0x00007fff8b98eeda
_CFXNotificationPost + 2554
12 Foundation 0x00007fff8ed7f7b6
-[NSNotificationCenter postNotificationName:object:userInfo:] + 64
13 AppKit 0x00007fff91aac260
-[NSTableView _sendSelectionChangedNotificationForRows:columns:] + 176
14 AppKit 0x00007fff91a9142c
-[NSTableView _enableSelectionPostingAndPost] + 411
15 AppKit 0x00007fff91a90382
-[NSTableView _verifySelectionIsOK] + 1194
16 AppKit 0x00007fff91a77e1d
-[NSTableView _tileAndRedisplayAll] + 350
17 AppKit 0x00007fff91b16040
-[NSTableBinder _updateContent] + 275
18 AppKit 0x00007fff91b15e47
-[NSTableBinder _observeValueForKeyPath:ofObject:context:] + 84
19 AppKit 0x00007fff91b15c58
-[NSTableBinder observeValueForKeyPath:ofObject:change:context:] + 63
20 Foundation 0x00007fff8edc27b7
NSKeyValueNotifyObserver + 390
21 Foundation 0x00007fff8edbcc65
-[NSObject(NSKeyValueObservingPrivate) _notifyObserversForKeyPath:change:] + 967
22 AppKit 0x00007fff91a71df3
-[NSController _notifyObserversForKeyPath:change:] + 209
23 AppKit 0x00007fff91a71c3e
-[NSArrayController didChangeValuesForArrangedKeys:objectKeys:indexKeys:] + 54
24 AppKit 0x00007fff91a8b4de
-[NSArrayController setContent:] + 878
25 AppKit 0x00007fff91a8acb8
-[NSArrayDetailBinder _refreshDetailContentInBackground:] + 1268
26 Foundation 0x00007fff8edc466d
-[NSKeyValueObservance observeValueForKeyPath:ofObject:change:context:] + 304
27 Foundation 0x00007fff8edc27b7
NSKeyValueNotifyObserver + 390
28 Foundation 0x00007fff8edc41c1
NSKeyValueDidChange + 456
29 Foundation 0x00007fff8ed7f76a
-[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] + 118
30 Foundation 0x00007fff8ed44e31
-[NSMetadataQuery _recreateQuery] + 421
31 Digital Librarian 0x00000001000075b1
-[SpoDelegate(SpoDelegatePrivate) startQueryFor:] + 769
32 Digital Librarian 0x00000001000022cd
-[SpoDelegate searchTextDone:] + 141
33 AppKit 0x00007fff91a31959
-[NSApplication sendAction:to:from:] + 342
34 AppKit 0x00007fff91a317b7 -[NSControl
sendAction:to:] + 85
35 AppKit 0x00007fff91b13ee0
-[NSTextField textDidEndEditing:] + 691
36 CoreFoundation 0x00007fff8b98eeda
_CFXNotificationPost + 2554
37 Foundation 0x00007fff8ed7f7b6
-[NSNotificationCenter postNotificationName:object:userInfo:] + 64
38 AppKit 0x00007fff9183d469
-[NSTextView(NSPrivate) _giveUpFirstResponder:] + 443
39 AppKit 0x00007fff9183d296
-[NSTextView(NSKeyBindingCommands) insertNewline:] + 555
40 AppKit 0x00007fff9183cf6c
-[NSResponder doCommandBySelector:] + 75
41 AppKit 0x00007fff9183cdce -[NSTextView
doCommandBySelector:] + 197
42 AppKit 0x00007fff918bfe6e
-[NSKeyBindingManager(NSKeyBindingManager_MultiClients)
interpretEventAsCommand:forClient:] + 2200
43 AppKit 0x00007fff918bf2db
-[NSTextInputContext handleEvent:] + 939
44 AppKit 0x00007fff918beea7 -[NSView
interpretKeyEvents:] + 183
45 AppKit 0x00007fff9180bc57 -[NSTextView
keyDown:] + 723
46 AppKit 0x00007fff91a27020 -[NSWindow
sendEvent:] + 9687
47 AppKit 0x00007fff91a22644
-[NSApplication sendEvent:] + 5761
48 AppKit 0x00007fff9193821a
-[NSApplication run] + 636
49 AppKit 0x00007fff918dcbd6
NSApplicationMain + 869
50 Digital Librarian 0x0000000100001dc2 main + 34
51 Digital Librarian 0x0000000100001d94 start + 52
52 ??? 0x0000000000000003 0x0 + 3
)
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