What could cause a fast enumeration mutation error in updating tracking areas?
What could cause a fast enumeration mutation error in updating tracking areas?
- Subject: What could cause a fast enumeration mutation error in updating tracking areas?
- From: Gideon King <email@hidden>
- Date: Fri, 29 Jul 2011 16:33:16 +1000
Hi, I have a problem where a few users of my program are getting the following exception:
0 CoreFoundation 0x00007fff862df7b4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x00007fff84b0ff03 objc_exception_throw + 45
2 CoreFoundation 0x00007fff863375bf __NSFastEnumerationMutationHandler + 303
3 AppKit 0x00007fff83ec8660 -[NSView trackingAreas] + 271
4 AppKit 0x00007fff83f1d025 -[NSView(NSInternal) _updateTrackingAreas] + 249
5 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
6 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
7 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
8 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
9 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
10 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
11 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
12 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
13 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
14 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
15 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
16 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
17 CoreFoundation 0x00007fff86259d6e CFArrayApplyFunction + 222
18 AppKit 0x00007fff83f1d413 -[NSView(NSInternal) _updateTrackingAreas] + 1255
19 AppKit 0x00007fff83f1ce28 _handleInvalidCursorRectsNote + 451
20 CoreFoundation 0x00007fff8629eb37 __CFRunLoopDoObservers + 519
21 CoreFoundation 0x00007fff8627a464 __CFRunLoopRun + 468
22 CoreFoundation 0x00007fff86279dbf CFRunLoopRunSpecific + 575
23 HIToolbox 0x00007fff854f774e RunCurrentEventLoopInMode + 333
24 HIToolbox 0x00007fff854f7553 ReceiveNextEventCommon + 310
25 HIToolbox 0x00007fff854f740c BlockUntilNextEventMatchingListInMode + 59
26 AppKit 0x00007fff83ef1eb2 _DPSNextEvent + 708
27 AppKit 0x00007fff83ef1801 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155
28 AppKit 0x00007fff83eb768f -[NSApplication run] + 395
29 OmniAppKit 0x000000010055c774 -[OAApplication run] + 132
30 AppKit 0x00007fff83eb03b0 NSApplicationMain + 364
31 NovaMind5 0x0000000100002018 start + 52
32 ??? 0x0000000000000002 0x0 + 2
But all the tracking areas I am adding are done in the initialization of the views or awakeFromNib, and not updated after that. I do use tracking rects and tooltip rects, and wonder whether they use tracking areas behind the scenes, and whether there are specific places in the code I need to avoid changing them.
I haven't been able to reproduce the problem here, so can't catch it in the act so far.
Any suggestions as to what to look for?
Thanks
Gideon
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