EXC_BAD_ACCESS (SIGSEGV) and KERN_INVALID_ADDRESS at 0xa0000008 - iphone

Question

I have a problem that occurs from time to time and I can't find
the solution, can someone help me? Thanks
Here is the log of the crash and where the method is called
0 libobjc.A.dylib 0x00003fb0 objc_msgSend + 16
1 Authentic 0x00048ce2 -[JobsSubtitleView touchUp:] (JobsSubtitleView.m:172)
2 CoreFoundation 0x00026486 -[NSObject performSelector:withObject:withObject:] + 46
3 UIKit 0x00032bf8 -[UIApplication sendAction:to:from:forEvent:] + 56
4 UIKit 0x00032bb4 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 24
5 UIKit 0x00032b92 -[UIControl sendAction:to:forEvent:] + 38
6 UIKit 0x00032902 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 486
7 UIKit 0x0003307a -[UIControl touchesEnded:withEvent:] + 470
8 UIKit 0x00031914 -[UIWindow _sendTouchesForEvent:] + 312
9 UIKit 0x0003133a -[UIWindow sendEvent:] + 374
10 UIKit 0x000076e6 -[UIApplication sendEvent:] + 350
11 UIKit 0x000070d2 _UIApplicationHandleEvent + 5802
12 GraphicsServices 0x00004f44 PurpleEventCallback + 876
13 CoreFoundation 0x00083a28 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
14 CoreFoundation 0x000839ca __CFRunLoopDoSource1 + 134
15 CoreFoundation 0x000825f0 __CFRunLoopRun + 1364
16 CoreFoundation 0x00023f72 CFRunLoopRunSpecific + 294
17 CoreFoundation 0x00023e3a CFRunLoopRunInMode + 98
18 GraphicsServices 0x0000411e GSEventRunModal + 150
19 UIKit 0x00002472 UIApplicationMain + 1074
20 Authentic 0x0006bbd0 main (main.m:17)
21 Authentic 0x00002e8c start + 32
- (void) touchUp:(id)sender {
if(![[UIApplication sharedApplication] isNetworkActivityIndicatorVisible]) {
UIButton *jobsSubtitleButton = (UIButton*)sender;
[jobsSubtitleButton setSelected:!jobsSubtitleButton.selected];
[jobsViewController setClickType:YES]; /*** LINE 172 ***/
if(![jobsViewController isSearching]) {
[jobsViewController setIsSearching:YES];
if([jobsViewController clickType]) {
[self performSelector:#selector(reloadJobs) withObject:nil afterDelay:1.0f];
} else {
[self performSelector:#selector(reloadJobs) withObject:nil];
}
}
}
}

Answer 1

You have not provided enough code to make the root cause of the problem clear. The crash happens because the jobsViewController ivar in your object points to an object that has already been deallocated. But why was it deallocated at this point? There is no way to know based on this code. The most likely cause is that you forgot to retain it or the property was not declared as "retain". But, there could be a number of programming mistakes that were the root cause. You will need to do a code review looking specifically for problems related to not retaining the object pointed to by jobsViewController.