KVO crash notifying deallocated observer
Originator: | kimtsi | ||
Number: | rdar://15985376 | Date Originated: | 02/04/2014 |
Status: | Open | Resolved: | |
Product: | iOS | Product Version: | 7.1beta5 |
Classification: | Crash | Reproducible: | Always |
Summary: KVO crash notifying deallocated observer Steps to Reproduce: 1. Create observer and observe object.property on Thread 1. 2. Mutate object.property on Thread 2. 3. Unobserve object.property and dealloc observer on Thread 1. 4. Repeat Steps 1-3. 1. Run Sample app attached. Expected Results: No crash. Actual Results: 2014-02-04 15:56:00.469 FBKVOController[78158:1303] *** -[FBKVOController retain]: message sent to deallocated instance 0x6fd366fd0 (lldb) bt all thread #1: tid = 0x1ef872, 0x00000001022c3a1a libsystem_kernel.dylib`mach_msg_trap + 10, queue = 'com.apple.main-thread frame #0: 0x00000001022c3a1a libsystem_kernel.dylib`mach_msg_trap + 10 frame #1: 0x00000001022c2d18 libsystem_kernel.dylib`mach_msg + 64 frame #2: 0x0000000101aa7255 CoreFoundation`__CFRunLoopServiceMachPort + 181 frame #3: 0x0000000101aac7cf CoreFoundation`__CFRunLoopRun + 1199 frame #4: 0x0000000101aabf33 CoreFoundation`CFRunLoopRunSpecific + 467 frame #5: 0x0000000103c083a0 GraphicsServices`GSEventRunModal + 161 frame #6: 0x000000010026e043 UIKit`UIApplicationMain + 1010 frame #7: 0x0000000100002143 FBKVOController`main(argc=1, argv=0x00007fff5fbfec30) + 115 at main.m:16 frame #8: 0x00000001021905fd libdyld.dylib`start + 1 thread #2: tid = 0x1ef97c, 0x00000001022c8662 libsystem_kernel.dylib`kevent64 + 10, queue = 'com.apple.libdispatch-manager frame #0: 0x00000001022c8662 libsystem_kernel.dylib`kevent64 + 10 frame #1: 0x0000000101ed5590 libdispatch.dylib`_dispatch_mgr_invoke + 239 frame #2: 0x0000000101ed532d libdispatch.dylib`_dispatch_mgr_thread + 54 * thread #3: tid = 0x1ef97d, 0x0000000101af2fd4 CoreFoundation`___forwarding___ + 772, queue = 'com.apple.root.high-priority, stop reason = EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0) frame #0: 0x0000000101af2fd4 CoreFoundation`___forwarding___ + 772 frame #1: 0x0000000101af2c48 CoreFoundation`_CF_forwarding_prep_0 + 120 frame #2: 0x000000010120cf14 Foundation`NSKeyValuePushPendingNotificationPerThread + 363 frame #3: 0x000000010120c836 Foundation`NSKeyValueWillChange + 453 frame #4: 0x00000001011d00c3 Foundation`-[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:] + 221 frame #5: 0x00000001011a85e5 Foundation`_NSSetDoubleValueAndNotify + 105 frame #6: 0x0000000100001bd3 FBKVOController`__24-[FBAppDelegate _stress]_block_invoke(.block_descriptor=<unavailable>) + 67 at FBAppDelegate.m:26 frame #7: 0x0000000101ecf8c1 libdispatch.dylib`_dispatch_call_block_and_release + 12 frame #8: 0x0000000101ee26fd libdispatch.dylib`_dispatch_client_callout + 8 frame #9: 0x0000000101ed2b7d libdispatch.dylib`_dispatch_root_queue_drain + 362 frame #10: 0x0000000101ed2d65 libdispatch.dylib`_dispatch_worker_thread2 + 40 frame #11: 0x000000010228cef8 libsystem_pthread.dylib`_pthread_wqthread + 314 frame #12: 0x000000010228ffb9 libsystem_pthread.dylib`start_wqthread + 13 thread #4: tid = 0x1ef97e, 0x00000001022c3942 libsystem_kernel.dylib`_kernelrpc_mach_vm_allocate_trap + 10, queue = 'com.apple.root.high-priority frame #0: 0x00000001022c3942 libsystem_kernel.dylib`_kernelrpc_mach_vm_allocate_trap + 10 frame #1: 0x00000001022c6783 Version: iOS 7.0.3 (11B508) Notes: Configuration: Xcode 5.0.2 (5A3005), OS X 10.9.1, MacBook Pro Attachments: 'MacBook Pro.spx' and 'FBKVOController.zip' were successfully uploaded. Attachment URL: https://dl.dropboxusercontent.com/u/1898287/rdar/15985376/FBKVOController.zip
Comments
Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!