I've hit issues with splitView delegate getting called after the delegate is
dealloced, and my setDelegate happens in the nib - normally what gets set in
the nib gets unset correctly later. I had to put in a
NSWindowWillCloseNotification observer and clear the splitView delegate there.
It's an incredibly complex window with lots of connections (but no leaks or
retain cycles), and it didn't happen in my stripped-down sample app, so I never
filed it.
I really wish the converse of awakeFromNib was public so we could do our own
pre-dealloc nib teardown when we need to.
On Aug 20, 2012, at 2:14 PM, Kevin Perry wrote:
> Looks like the crash is happening while attempting to invoke
> -respondsToSelector:.
>
> Odds are that this is a message being sent to [self delegate], which looks
> like a deallocated object.
>
> Is it possible that the split view is outliving its delegate? Typically, when
> a delegate gets deallocated (or when you release it for the last time), you
> are responsible for calling setDelegate:nil on anything that you had
> previously set it as a delegate for.
>
> -KP
>
> On Aug 20, 2012, at 12:57 PM, Jerry Krinock <je...@ieee.org> wrote:
>
>> SUMMARY
>>
>> While testing an app in 10.8 today, it crashed three times out of six upon
>> restoring from the Versions Browser. But the problem has now gone away. I
>> don't have enough information to file a bug report or try any more
>> workarounds, so I'm throwing my observations out there in case someone else
>> has seen or will see this problem. Maybe we can put our observations
>> together and get further.
>>
>> DETAILS
>>
>> Crash report is at end of this message. You see all of the stack is in
>> Apple's code.
>>
>> Not knowing what else to do, I subclassed NSSplitView, to log the parameters
>> and invoke super. After doing this, I couldn't make it crash any more :|
>> The logged parameters were always reasonable. Assuming that this is going
>> to bite back later, I left it subclassed with the following rather
>> do-nothing implementation…
>>
>> - (void)resizeSubviewsWithOldSize:(NSSize)oldBoundsSize {
>> NSRect screenFrame = [[[self window] screen] frame] ;
>>
>> if (oldBoundsSize.width > screenFrame.size.width) {
>> NSLog(@"Warning 502-9481 clipped split view width to %f",
>> screenFrame.size.width) ;
>> }
>> if (oldBoundsSize.height > screenFrame.size.height) {
>> NSLog(@"Warning 502-9482 clipped split view height to %f",
>> screenFrame.size.height) ;
>> }
>>
>> [super resizeSubviewsWithOldSize:oldBoundsSize] ;
>> }
>>
>> Maybe it will crash again someday and tell me something.
>>
>> Other factors which may be involved…
>>
>> • Just last week, I cleaned up and started compiling this app as 64-bit,
>> built in Xcode 4 with NSSplitView and Mac OS X 10.8 SDK. The version now in
>> the field is 32-bit only, built in Xcode 3 with RBSplitView and Mac OS X
>> 10.6 SDK.
>> • In Mac OS X 10.8, in the Versions browser, when clicking on the view of
>> the old version, the view magnifies and gets bigger. I don't remember this
>> happening in 10.7. Possibly this resizing is triggering the crash.
>> • Others have seen this method crash, although in different ways…
>> http://dev.sequelpro.com/log/viewreports/1392/37095
>> http://dev.sequelpro.com/log/view/1392
>>
>> Thanks for reading,
>>
>> Jerry Krinock
>>
>> Here is some of the crash report…
>>
>> Code Type: X86-64 (Native)
>> Parent Process: launchd [125]
>> User ID: 501
>>
>> Date/Time: 2012-08-20 05:36:00.652 -0700
>> OS Version: Mac OS X 10.8 (12A256)
>> Report Version: 10
>>
>> Interval Since Last Report: 12640 sec
>> Crashes Since Last Report: 1
>> Per-App Crashes Since Last Report: 1
>>
>> Crashed Thread: 0 Dispatch queue: com.apple.main-thread
>>
>> Exception Type: EXC_BAD_ACCESS (SIGSEGV)
>> Exception Codes: EXC_I386_GPFLT
>>
>> Application Specific Information:
>> objc_msgSend() selector name: respondsToSelector:
>>
>>
>> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
>> 0 libobjc.A.dylib 0x00007fff8c0b0590 objc_msgSend_vtable5
>> + 16
>> 1 com.apple.AppKit 0x00007fff90a316d5 -[NSSplitView
>> resizeSubviewsWithOldSize:] + 370
>> 2 com.apple.AppKit 0x00007fff908103c8 -[NSView
>> setFrameSize:] + 1101
>> 3 com.apple.AppKit 0x00007fff9080fc0e -[NSView setFrame:]
>> + 299
>> 4 com.apple.AppKit 0x00007fff90864e92 -[NSView
>> resizeWithOldSuperviewSize:] + 1502
>> 5 com.apple.AppKit 0x00007fff90863fd7 -[NSView
>> resizeSubviewsWithOldSize:] + 318
>> 6 com.apple.AppKit 0x00007fff908103c8 -[NSView
>> setFrameSize:] + 1101
>> 7 com.apple.AppKit 0x00007fff9080fc0e -[NSView setFrame:]
>> + 299
>> 8 com.apple.AppKit 0x00007fff90a10f6d -[NSTabView
>> _resizeSelectedTabViewItem] + 119
>> 9 com.apple.AppKit 0x00007fff90a10ee4 -[NSTabView
>> setFrameSize:] + 218
>> 10 com.apple.AppKit 0x00007fff9080fc0e -[NSView setFrame:]
>> + 299
>> 11 com.apple.AppKit 0x00007fff90864e92 -[NSView
>> resizeWithOldSuperviewSize:] + 1502
>> 12 com.apple.AppKit 0x00007fff90863fd7 -[NSView
>> resizeSubviewsWithOldSize:] + 318
>> 13 com.apple.AppKit 0x00007fff908103c8 -[NSView
>> setFrameSize:] + 1101
>> 14 com.apple.AppKit 0x00007fff9080fc0e -[NSView setFrame:]
>> + 299
>> 15 com.apple.AppKit 0x00007fff90864e92 -[NSView
>> resizeWithOldSuperviewSize:] + 1502
>> 16 com.apple.AppKit 0x00007fff90863fd7 -[NSView
>> resizeSubviewsWithOldSize:] + 318
>> 17 com.apple.AppKit 0x00007fff908103c8 -[NSView
>> setFrameSize:] + 1101
>> 18 com.apple.AppKit 0x00007fff9086e254 -[NSThemeFrame
>> setFrameSize:] + 513
>> 19 com.apple.AppKit 0x00007fff9086d34f -[NSWindow
>> _setFrame:updateBorderViewSize:] + 929
>> 20 com.apple.AppKit 0x00007fff9086cac4 -[NSWindow
>> _oldPlaceWindow:] + 1142
>> 21 com.apple.AppKit 0x00007fff9086bf79 -[NSWindow
>> _setFrameCommon:display:stashSize:] + 1837
>> 22 com.apple.AppKit 0x00007fff90733933 __28-[NSMoveHelper
>> _doAnimation]_block_invoke_0 + 1003
>> 23 com.apple.CoreFoundation 0x00007fff8bd464b4
>> __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
>> 24 com.apple.CoreFoundation 0x00007fff8bd45fcd __CFRunLoopDoTimer +
>> 557
>> 25 com.apple.CoreFoundation 0x00007fff8bd2b7b9 __CFRunLoopRun + 1513
>> 26 com.apple.CoreFoundation 0x00007fff8bd2add2 CFRunLoopRunSpecific
>> + 290
>> 27 com.apple.AppKit 0x00007fff9073332c -[NSMoveHelper
>> _doAnimation] + 1373
>> 28 com.apple.AppKit 0x00007fff90732b66 -[NSMoveHelper
>> _resizeWindow:toFrame:display:] + 493
>> 29 com.apple.AppKit 0x00007fff90a1f773 -[NSWindow
>> setFrame:display:animate:] + 1337
>> 30 com.apple.AppKit 0x00007fff90f8314c __block_global_9 +
>> 141
>> 31 libdispatch.dylib 0x00007fff95c64f3d
>> _dispatch_call_block_and_release + 15
>> 32 libdispatch.dylib 0x00007fff95c610fa
>> _dispatch_client_callout + 8
>> 33 libdispatch.dylib 0x00007fff95c659ab
>> _dispatch_after_timer_callback + 22
>> 34 libdispatch.dylib 0x00007fff95c610fa
>> _dispatch_client_callout + 8
>> 35 libdispatch.dylib 0x00007fff95c632d7
>> _dispatch_source_invoke + 691
>> 36 libdispatch.dylib 0x00007fff95c62349
>> _dispatch_queue_invoke + 72
>> 37 libdispatch.dylib 0x00007fff95c660cd
>> _dispatch_main_queue_callback_4CF + 220
>> 38 com.apple.CoreFoundation 0x00007fff8bd2b81e __CFRunLoopRun + 1614
>> 39 com.apple.CoreFoundation 0x00007fff8bd2add2 CFRunLoopRunSpecific
>> + 290
>> 40 com.apple.HIToolbox 0x00007fff8d2a3774
>> RunCurrentEventLoopInMode + 209
>> 41 com.apple.HIToolbox 0x00007fff8d2a3512
>> ReceiveNextEventCommon + 356
>> 42 com.apple.HIToolbox 0x00007fff8d2a33a3
>> BlockUntilNextEventMatchingListInMode + 62
>> 43 com.apple.AppKit 0x00007fff9083d1d3 _DPSNextEvent + 685
>> 44 com.apple.AppKit 0x00007fff9083ca92 -[NSApplication
>> nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
>> 45 com.apple.AppKit 0x00007fff90833e33 -[NSApplication run]
>> + 517
>> 46 com.apple.AppKit 0x00007fff907d8886 NSApplicationMain +
>> 869
>>
>>
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