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Cocoa framework for improving AppKit
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Weak rbl_viewController reference causing EXC_BAD_ACCESS errors #115

Closed jaredholdcroft closed 11 years ago

jaredholdcroft commented 11 years ago

Hi,

I'm fairly new to OSX dev and very new to Rebel so i'm sure i'm missing something obvious here.

I'm using Rebel, via cocoapods, and as i've started to add more complex view hierarchies I have started to get EXC_BAD_ACCESS errors at line 61 of NSVIew+RBLViewControllerAdditions:

if ([self.rbl_viewController isKindOfClass:[RBLViewController class]]) {

Looking through the code I noticed that the rbl_viewController object association policy is assign i.e. a weak reference. Changing this to be OBJC_ASSOCIATION_RETAIN_NONATOMIC has fixed my problem but i'm not sure of the full impact of this. I guess my main question is - what could I be doing wrong so that I need to retain this reference?

It happens a in 10.8 and 10.9 and we're using ARC.

Full stack trace:

Hardware Model:      MacPro3,1
Process:         Neenah Cabinet [29766]
Path:            /Applications/Neenah Cabinet 3.app/Contents/MacOS/Neenah Cabinet
Identifier:      com.neenah.cabinet.Neenah-Cabinet
Version:         1
Code Type:       X86-64
Parent Process:  launchd [159]

Date/Time:       2013-11-22 14:49:27 +0000
OS Version:      Mac OS X 10.8.5 (12F37)
Report Version:  104

Exception Type:  SIGSEGV
Exception Codes: SEGV_NOOP at 0x0
Crashed Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib                      0x00007fff8d5fb36e objc_retain + 14
1   Neenah Cabinet                       0x00000001031c0921 -[NSView(NSView_RBLViewControllerAdditions) custom_viewWillMoveToSuperview:] (NSView+RBLViewControllerAdditions.m:61)
2   AppKit                               0x00007fff8c630edb -[NSScrollView viewWillMoveToSuperview:] + 87
3   AppKit                               0x00007fff8c56b3b8 -[NSView _setSuperview:] + 303
4   AppKit                               0x00007fff8c56e29e -[NSView removeFromSuperview] + 421
5   AppKit                               0x00007fff8c69fef0 -[NSScrollView removeFromSuperview] + 338
6   AppKit                               0x00007fff8c69ba4f -[NSView removeFromSuperviewWithoutNeedingDisplay] + 39
7   AppKit                               0x00007fff8c58c52b -[NSView _finalizeWithReferenceCounting] + 965
8   AppKit                               0x00007fff8c58c13e -[NSView dealloc] + 42
9   libobjc.A.dylib                      0x00007fff8d5fb230 _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 464
10  CoreFoundation                       0x00007fff8e217d72 _CFAutoreleasePoolPop + 34
11  Foundation                           0x00007fff86f3a47a -[NSAutoreleasePool drain] + 154
12  AppKit                               0x00007fff8c58e27e -[NSApplication run] + 736
13  AppKit                               0x00007fff8c532bd6 NSApplicationMain + 869
14  Neenah Cabinet                       0x000000010313fec4 start + 52

Thread 1:
0   libsystem_kernel.dylib               0x00007fff84892d16 kevent + 10
1   libdispatch.dylib                    0x00007fff875eb9ee _dispatch_mgr_thread + 54

Thread 2:
0   libsystem_kernel.dylib               0x00007fff84890686 mach_msg_trap + 10
1   CoreFoundation                       0x00007fff8e217233 __CFRunLoopServiceMachPort + 195
2   CoreFoundation                       0x00007fff8e21c916 __CFRunLoopRun + 1078
3   CoreFoundation                       0x00007fff8e21c0e2 CFRunLoopRunSpecific + 290
4   Foundation                           0x00007fff86f17546 +[NSURLConnection(Loader) _resourceLoadLoop:] + 356
5   Foundation                           0x00007fff86f75562 __NSThread__main__ + 1345
6   libsystem_c.dylib                    0x00007fff8bcde772 _pthread_start + 327
7   libsystem_c.dylib                    0x00007fff8bccb1a1 thread_start + 13

Thread 3:
0   libsystem_kernel.dylib               0x00007fff84892322 __select + 10
1   libsystem_c.dylib                    0x00007fff8bcde772 _pthread_start + 327
2   libsystem_c.dylib                    0x00007fff8bccb1a1 thread_start + 13

Thread 4:
0   libsystem_kernel.dylib               0x00007fff84890686 mach_msg_trap + 10
1   CoreFoundation                       0x00007fff8e217233 __CFRunLoopServiceMachPort + 195
2   CoreFoundation                       0x00007fff8e21c916 __CFRunLoopRun + 1078
3   CoreFoundation                       0x00007fff8e21c0e2 CFRunLoopRunSpecific + 290
4   Foundation                           0x00007fff86f7a7ee -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268
5   Foundation                           0x00007fff86f131aa -[NSRunLoop(NSRunLoop) run] + 74
6   Neenah Cabinet                       0x00000001031a1140 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:185)
7   Foundation                           0x00007fff86f75562 __NSThread__main__ + 1345
8   libsystem_c.dylib                    0x00007fff8bcde772 _pthread_start + 327
9   libsystem_c.dylib                    0x00007fff8bccb1a1 thread_start + 13

Thread 5:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 6:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 7:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 8:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 9:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 10:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 11:
0   libsystem_kernel.dylib               0x00007fff848926d6 __workq_kernreturn + 10
1   libsystem_c.dylib                    0x00007fff8bce0ce3 _pthread_wqthread + 412
2   libsystem_c.dylib                    0x00007fff8bccb191 start_wqthread + 13

Thread 12:
0   ???                                  0x0000000000000000 0x0 + 0

Thread 0 crashed with X86-64 Thread State:
   rip: 0x00007fff8d5fb36e    rbp: 0x00007fff5cac1410    rsp: 0x00007fff5cac13c8    rax: 0x7000000000000000 
   rbx: 0x00007fff8d5f7240    rcx: 0x00007fae98c564b0    rdx: 0x0000000000000000    rdi: 0x00007fae97b1a6c0 
   rsi: 0x00007fae98c56510     r8: 0xffff80516844469f     r9: 0x0000000000001fff    r10: 0x000000010838a7e0 
   r11: 0x00007fae92412940    r12: 0x00007fff8d5f7200    r13: 0x0000000004808001    r14: 0x0000000000000000 
   r15: 0x00007fae97be08f0 rflags: 0x0000000000010246     cs: 0x000000000000002b     fs: 0x0000000000000000 
    gs: 0x0000000000000000 

Binary Images:
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       0x10326b000 -        0x1032a3fff +HockeySDK x86_64  <9970508176ca320f873fa84c6a4ad51d> /Applications/Neenah Cabinet 3.app/Contents/Frameworks/HockeySDK.framework/Versions/A/HockeySDK
       0x10522a000 -        0x105233fff  libcldcpuengine.dylib x86_64  <b6e3b14b1eac3fdd8aed87231a033bed> /System/Library/Frameworks/OpenCL.framework/Libraries/libcldcpuengine.dylib
       0x1052c1000 -        0x1052c2fff  cl_kernels x86_64  <9fb7f4597ece440f8e43394b625b545f> cl_kernels
       0x1052cf000 -        0x1052cffff  cl_kernels x86_64  <18e51f7409f241d5bd8bd257a031ac8d> cl_kernels
       0x105449000 -        0x105449fff  cl_kernels x86_64  <789012dce7f9483f9f17b0e644798346> cl_kernels
       0x105453000 -        0x105453fff  cl_kernels x86_64  <43ebe2aecd3a466a8975194bb913554d> cl_kernels
       0x105f5c000 -        0x105ff6fff  unorm8_bgra.dylib x86_64  <5d62bed8df5d3c5194b457368ff10ddb> /System/Library/Frameworks/OpenCL.framework/Libraries/ImageFormats/unorm8_bgra.dylib
       0x108835000 -        0x1089f3fff  GLEngine x86_64  <1bd4d913ce6c3389b4e1fc7352e4c23f> /System/Library/Frameworks/OpenGL.framework/Resources/GLEngine.bundle/GLEngine
       0x108a2a000 -        0x108b9afff  libGLProgrammability.dylib x86_64  <3e488cef57513073b8ee0b4ca39cb6ab> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLProgrammability.dylib
       0x108bd2000 -        0x108e9bfff  AMDRadeonX3000GLDriver x86_64  <7c205f2af9423d2da5d6c5c8dadd81e4> /System/Library/Extensions/AMDRadeonX3000GLDriver.bundle/Contents/MacOS/AMDRadeonX3000GLDriver
       0x108ef9000 -        0x108efefff  IOAccelerator x86_64  <d8c401794a2934019b356e61ea278d41> /System/Library/PrivateFrameworks/IOAccelerator.framework/Versions/A/IOAccelerator
       0x108f06000 -        0x108f12fff  libGPUSupportMercury.dylib x86_64  <1de2d7f9c0313bbfbd5f4e1208b6f296> /System/Library/PrivateFrameworks/GPUSupport.framework/Versions/A/Libraries/libGPUSupportMercury.dylib
       0x109319000 -        0x109344fff  GLRendererFloat x86_64  <055ec8e72d7e370c96addbeedb106927> /System/Library/Frameworks/OpenGL.framework/Resources/GLRendererFloat.bundle/GLRendererFloat
       0x10a65a000 -        0x10a6f0fff  unorm8_rgba.dylib x86_64  <853bebc4aed93ce2b91d3d666e7c7c8f> /System/Library/Frameworks/OpenCL.framework/Libraries/ImageFormats/unorm8_rgba.dylib
    0x7fff81e8c000 -     0x7fff81e9ffff  LangAnalysis x86_64  <2f2694e9a7bc33c7b4cf8ec907df0feb> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/LangAnalysis.framework/Versions/A/LangAnalysis
    0x7fff81ea0000 -     0x7fff81fa2fff  libcrypto.0.9.8.dylib x86_64  <cf3bab7e497239fdaf9228acaff0873e> /usr/lib/libcrypto.0.9.8.dylib
    0x7fff81ffb000 -     0x7fff82043fff  libcurl.4.dylib x86_64  <ebdbf42de4a63d05a76b2817d79d59e2> /usr/lib/libcurl.4.dylib
    0x7fff82044000 -     0x7fff82044fff  Carbon x86_64  <372716d26fa1361185013dd1d4a6e8c8> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
    0x7fff82045000 -     0x7fff82045fff  vecLib x86_64  <6cbbfdc4415c39109558b67176447789> /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib
    0x7fff82046000 -     0x7fff822b3fff  RawCamera x86_64  <1588cec6012e30e5bf385bbdabb2f48f> /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
    0x7fff822b4000 -     0x7fff822eafff  DebugSymbols x86_64  <14e788b14eb23fd7934b849534dfc198> /System/Library/PrivateFrameworks/DebugSymbols.framework/Versions/A/DebugSymbols
    0x7fff822eb000 -     0x7fff82520fff  CoreData x86_64  <a676e1a42144376b92b8b450dd1d78e5> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
    0x7fff82521000 -     0x7fff82523fff  TrustEvaluationAgent x86_64  <a97d348b32bf3e528df259bfad21e1a3> /System/Library/PrivateFrameworks/TrustEvaluationAgent.framework/Versions/A/TrustEvaluationAgent
    0x7fff827ac000 -     0x7fff827cdfff  libCRFSuite.dylib x86_64  <736abe588ded3289a042c25af7ae5b23> /usr/lib/libCRFSuite.dylib
    0x7fff828fd000 -     0x7fff82908fff  libsystem_notify.dylib x86_64  <c49275cc835a3207afba8c01374927b6> /usr/lib/system/libsystem_notify.dylib
    0x7fff82916000 -     0x7fff82929fff  libbsm.0.dylib x86_64  <f497d3ce40d9355184b43d5e39600737> /usr/lib/libbsm.0.dylib
    0x7fff8292a000 -     0x7fff8292afff  libkeymgr.dylib x86_64  <cc9e3394be16397f926be579b60ee429> /usr/lib/system/libkeymgr.dylib
    0x7fff82978000 -     0x7fff82987fff  libxar.1.dylib x86_64  <370ed355e516311ebafdd80633a84be1> /usr/lib/libxar.1.dylib
    0x7fff82988000 -     0x7fff82a45fff  ColorSync x86_64  <6ce333aeeddb376895989db38041dc55> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ColorSync.framework/Versions/A/ColorSync
    0x7fff82a46000 -     0x7fff82a68fff  libxpc.dylib x86_64  <70bc645b69523264930cc835010ccef9> /usr/lib/system/libxpc.dylib
    0x7fff82a9f000 -     0x7fff82ab6fff  libGL.dylib x86_64  <f8baba3c78103a6583fc61945aa50e90> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
    0x7fff82b21000 -     0x7fff82b4dfff  libRIP.A.dylib x86_64  <cc2a33eb409c3c4d97d441f4a080f874> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
    0x7fff82b4e000 -     0x7fff82f6bfff  FaceCoreLight x86_64  <ddaffd7ad3123407a0105aef3e17831b> /System/Library/PrivateFrameworks/FaceCoreLight.framework/Versions/A/FaceCoreLight
    0x7fff82f6c000 -     0x7fff82f6efff  SecurityHI x86_64  <34e45c60dc7e3fcca1edebf48b77c559> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SecurityHI.framework/Versions/A/SecurityHI
    0x7fff83052000 -     0x7fff83054fff  libCVMSPluginSupport.dylib x86_64  <f0239392e0cb37d7bfe2d6f5d42f9196> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libCVMSPluginSupport.dylib
    0x7fff83055000 -     0x7fff83063fff  libkxld.dylib x86_64  <6d1610c779f838a5bfb2f58f134bc8ea> /usr/lib/system/libkxld.dylib
    0x7fff83064000 -     0x7fff83067fff  libRadiance.dylib x86_64  <c317b2c7ca3a329fb6dc7cc33fe08c81> /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libRadiance.dylib
    0x7fff83068000 -     0x7fff8306efff  libCGXCoreImage.A.dylib x86_64  <fbaaf93317983e53b07188c930d6bdef> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGXCoreImage.A.dylib
    0x7fff8306f000 -     0x7fff83079fff  SpeechRecognition x86_64  <d803919c31023515a17861e9c86c46a1> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecognition.framework/Versions/A/SpeechRecognition
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    0x7fff83219000 -     0x7fff83299fff  ATS x86_64  <39b53565fa313f61b090c787c983142e> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/ATS
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    0x7fff83cd7000 -     0x7fff83dd4fff  libsqlite3.dylib x86_64  <ade9cb98d77d300ca32a556b7440769f> /usr/lib/libsqlite3.dylib
    0x7fff83e35000 -     0x7fff83e8afff  libTIFF.dylib x86_64  <7706bb07e7e838bea5f0d8b63e3b9283> /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
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joshaber commented 11 years ago

It sounds like the view controller's being deallocated before its associated view is.

Be sure to keep your view controller alive as long as your view is, and to remove the view from the view hierarchy when your view controller is deallocated.

jspahrsummers commented 11 years ago

Changing this to be OBJC_ASSOCIATION_RETAIN_NONATOMIC has fixed my problem but i'm not sure of the full impact of this.

The view controller retains the view, so this would create a retain cycle (with the view also retaining the controller in turn).

jaredholdcroft commented 11 years ago

I finally tracked down the problem - somehow in one of our xibs the rbl_viewController outlet had been manually connected up the parent NSViewController!

Thanks for replying so quickly to my issue, it was a big help.