I get a crash when i use my app. And i can't make it to reproduce. It is a SEGV_ACCERR error

Question

There is my crash descripiton:

#0 Thread SIGSEGV

SEGV_ACCERR

0 libobjc.A.dylib objc_msgSend + 28

1 CoreLocation CLClientGetCapabilities + 35548

2 CoreLocation CLClientGetCapabilities + 33812

3 CoreLocation CLClientInvalidate + 1000

4 CoreFoundation _CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 20

5 CoreFoundation ___CFRunLoopDoBlocks + 288

6 CoreFoundation ___CFRunLoopRun + 728

7 CoreFoundation CFRunLoopRunSpecific + 424

8 GraphicsServices GSEventRunModal + 100

9 UIKit UIApplicationMain + 208

10 iSmartLBS main (main.m:15)

11 libdyld.dylib _start + 4

I open the organizer on Xcode just now, and i find more information:

{ "SourceLine" : 1865, "SourceFile" : "CLLocationManager.m", "UserData" : { "Resolved" : false, "Name" : "CoreLocation: -[CLLocationManager onClientEventLocation:forceMapMatching:type:] + 1060", "Description" : "" }, "DefaultName" : "CoreLocation: -[CLLocationManager onClientEventLocation:forceMapMatching:type:] + 1060" }

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000010

Triggered by Thread: 0

Thread 0 name:

Thread 0 Crashed:

0 libobjc.A.dylib 0x0000000183a98150 objc_msgSend + 16

1 CoreLocation 0x000000018d2a6734 -[CLLocationManager onClientEventLocation:forceMapMatching:type:] + 1060 (CLLocationManager.m:1865)

2 CoreLocation 0x000000018d2a606c -[CLLocationManager onClientEvent:supportInfo:] + 1000 (CLLocationManager.m:1660)

3 CoreLocation 0x000000018d299278 ___Z22CLClientInvokeCallbackP10__CLClient13CLClientEventP11objc_object_block_invoke + 140 (CLClient.mm:763)

4 CoreFoundation 0x0000000184fd130c CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 20 (CFRunLoop.c:1818)

5 CoreFoundation 0x0000000184fd0b28 __CFRunLoopDoBlocks + 288 (CFRunLoop.c:1855)

6 CoreFoundation 0x0000000184fce9bc __CFRunLoopRun + 764 (CFRunLoop.c:2823)

7 CoreFoundation 0x0000000184efeda4 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3113)

8 GraphicsServices 0x0000000186968074 GSEventRunModal + 100 (GSEvent.c:2245)

9 UIKit 0x000000018b1b9058 UIApplicationMain + 208 (UIApplication.m:4089)

10 iSmartLBS 0x0000000100c3432c 0x10008c000 + 12223276

11 libdyld.dylib 0x0000000183f0d59c start + 4

Thread 1 name:

Thread 1:

0 libsystem_kernel.dylib 0x0000000183fff224 mach_msg_trap + 8

1 libsystem_kernel.dylib 0x0000000183fff09c mach_msg + 72 (mach_msg.c:103)

2 CoreFoundation 0x0000000184fd0e90 __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)

3 CoreFoundation 0x0000000184fceae4 __CFRunLoopRun + 1060 (CFRunLoop.c:2870)

4 CoreFoundation 0x0000000184efeda4 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3113)

5 Foundation 0x0000000185a18d74 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 (NSRunLoop.m:367)

6 Foundation 0x0000000185a39b44 -[NSRunLoop(NSRunLoop) runUntilDate:] + 96 (NSRunLoop.m:411)

7 UIKit 0x000000018bb436a8 -[UIEventFetcher threadMain] + 136 (UIEventFetcher.m:313)

8 Foundation 0x0000000185b162d8 NSThread__start + 996 (NSThread.m:1163)

9 libsystem_pthread.dylib 0x00000001840e568c _pthread_body + 240 (pthread.c:697)

10 libsystem_pthread.dylib 0x00000001840e559c _pthread_start + 284 (pthread.c:744)

11 libsystem_pthread.dylib 0x00000001840e2cb4 thread_start + 4

Thread 2 name:

Thread 2:

0 libsystem_kernel.dylib 0x0000000183fff224 mach_msg_trap + 8

1 libsystem_kernel.dylib 0x0000000183fff09c mach_msg + 72 (mach_msg.c:103)

2 CoreFoundation 0x0000000184fd0e90 __CFRunLoopServiceMachPort + 192 (CFRunLoop.c:2527)

3 CoreFoundation 0x0000000184fceae4 __CFRunLoopRun + 1060 (CFRunLoop.c:2870)

4 CoreFoundation 0x0000000184efeda4 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3113)

5 AVFAudio 0x000000019f242540 GenericRunLoopThread::Entry(void*) + 164 (GenericRunLoopThread.h:106)

6 AVFAudio 0x000000019f268814 CAPThread::Entry(CAPThread*) + 84

7 libsystem_pthread.dylib 0x00000001840e568c _pthread_body + 240 (pthread.c:697)

8 libsystem_pthread.dylib 0x00000001840e559c _pthread_start + 284 (pthread.c:744)

9 libsystem_pthread.dylib 0x00000001840e2cb4 thread_start + 4

Answer 1

The crash is caused SIGSEGV in objc_msgSend. This means you have tried to access invalid object address. This means there a some issue related to memory in app.

This problem mostly faced while you do delete or any operation on UITableView

Solution

1. You can find using your Analyze of xcode and fix all warning that they displayed to you.

2. Also You can track this using enable zoombie and Instrument tool in xcode .