App crashing on UIButton setImage

[mriphoneman]

Hey guys. I've got a weird bug in my app. The app is LED Flashlight (LED Flashlight - Brightest Flashlight for iPhone 4 for iPhone 4 on the iTunes App Store)

When you turn the LED light on, it will sometimes crash when I'm setting the image of a UIButton.

Here's the crash report:

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000008
Crashed Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib               	0x3212e86c objc_msgSend + 16
1   libobjc.A.dylib               	0x3212fbe6 objc_setProperty
2   UIKit                         	0x32339a00 -[UIButtonContent setImage:]
3   UIKit                         	0x323626e4 -[UIButton setImage:forState:]
4   LED Flashlight                	0x00002826 -[LED_FlashlightViewController turnon] + 358
5   CoreFoundation                	0x303077a6 -[NSObject(NSObject) performSelector:withObject:withObject:]
6   UIKit                         	0x32383822 -[UIApplication sendAction:to:from:forEvent:]
7   UIKit                         	0x323837c2 -[UIApplication sendAction:toTarget:fromSender:forEvent:]
8   UIKit                         	0x32383794 -[UIControl sendAction:to:forEvent:]
9   UIKit                         	0x323834e6 -[UIControl(Internal) _sendActionsForEvents:withEvent:]
10  UIKit                         	0x32383b34 -[UIControl touchesEnded:withEvent:]
11  UIKit                         	0x323824e6 -[UIWindow _sendTouchesForEvent:]
12  UIKit                         	0x32381e60 -[UIWindow sendEvent:]
13  UIKit                         	0x3237db54 -[UIApplication sendEvent:]
14  UIKit                         	0x3237d500 _UIApplicationHandleEvent
15  GraphicsServices              	0x31a78140 PurpleEventCallback
16  CoreFoundation                	0x30352aa4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__
17  CoreFoundation                	0x30354848 __CFRunLoopDoSource1
18  CoreFoundation                	0x30355626 __CFRunLoopRun
19  CoreFoundation                	0x302fe8e4 CFRunLoopRunSpecific
20  CoreFoundation                	0x302fe7ec CFRunLoopRunInMode
21  GraphicsServices              	0x31a776e8 GSEventRunModal
22  GraphicsServices              	0x31a77794 GSEventRun
23  UIKit                         	0x323272a0 -[UIApplication _run]
24  UIKit                         	0x32325e10 UIApplicationMain
25  LED Flashlight                	0x000020e4 main + 36
26  LED Flashlight                	0x000020b4 start + 32

Does anyone know what's going on? I've only had this happen to me a couple times, but it's coming in on the iTunes connect crash reports.

Any help is greatly appreciated.

Thanks!

[smithdale87]

An EXEC_BAD_ACCESS is usually indicative of you not retaining an object when you should be. Go through your app and be sure that you're retaining things when you should be ( and releasing things when you should be.)

[Duncan C]

Originally Posted by mriphoneman

Hey guys. I've got a weird bug in my app. The app is LED Flashlight (LED Flashlight - Brightest Flashlight for iPhone 4 for iPhone 4 on the iTunes App Store)

When you turn the LED light on, it will sometimes crash when I'm setting the image of a UIButton.

Here's the crash report:

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000008
Crashed Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib               	0x3212e86c objc_msgSend + 16
1   libobjc.A.dylib               	0x3212fbe6 objc_setProperty
2   UIKit                         	0x32339a00 -[UIButtonContent setImage:]
3   UIKit                         	0x323626e4 -[UIButton setImage:forState:]
4   LED Flashlight                	0x00002826 -[LED_FlashlightViewController turnon] + 358
5   CoreFoundation                	0x303077a6 -[NSObject(NSObject) performSelector:withObject:withObject:]
6   UIKit                         	0x32383822 -[UIApplication sendAction:to:from:forEvent:]
7   UIKit                         	0x323837c2 -[UIApplication sendAction:toTarget:fromSender:forEvent:]
8   UIKit                         	0x32383794 -[UIControl sendAction:to:forEvent:]
9   UIKit                         	0x323834e6 -[UIControl(Internal) _sendActionsForEvents:withEvent:]
10  UIKit                         	0x32383b34 -[UIControl touchesEnded:withEvent:]
11  UIKit                         	0x323824e6 -[UIWindow _sendTouchesForEvent:]
12  UIKit                         	0x32381e60 -[UIWindow sendEvent:]
13  UIKit                         	0x3237db54 -[UIApplication sendEvent:]
14  UIKit                         	0x3237d500 _UIApplicationHandleEvent
15  GraphicsServices              	0x31a78140 PurpleEventCallback
16  CoreFoundation                	0x30352aa4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__
17  CoreFoundation                	0x30354848 __CFRunLoopDoSource1
18  CoreFoundation                	0x30355626 __CFRunLoopRun
19  CoreFoundation                	0x302fe8e4 CFRunLoopRunSpecific
20  CoreFoundation                	0x302fe7ec CFRunLoopRunInMode
21  GraphicsServices              	0x31a776e8 GSEventRunModal
22  GraphicsServices              	0x31a77794 GSEventRun
23  UIKit                         	0x323272a0 -[UIApplication _run]
24  UIKit                         	0x32325e10 UIApplicationMain
25  LED Flashlight                	0x000020e4 main + 36
26  LED Flashlight                	0x000020b4 start + 32

Does anyone know what's going on? I've only had this happen to me a couple times, but it's coming in on the iTunes connect crash reports.

Any help is greatly appreciated.

Thanks!

I agree with smithdale87. That error usually means you have tried to send a message to an object that was released.

You might try using the "zombies" instrument, or clean your project and select "build and analyze" from the build menu. The static analyzer is pretty good at finding memory management problems with your code. If you haven't run it before, it may find a whole bunch of possible issues. It's usually worth fixing them all.

[wuf810]

Originally Posted by mriphoneman

Hey guys. I've got a weird bug in my app. The app is LED Flashlight (LED Flashlight - Brightest Flashlight for iPhone 4 for iPhone 4 on the iTunes App Store)

When you turn the LED light on, it will sometimes crash when I'm setting the image of a UIButton.

Does anyone know what's going on? I've only had this happen to me a couple times, but it's coming in on the iTunes connect crash reports.

Any help is greatly appreciated.

Thanks!

As the other's have pointed out you are trying to access an already released object.

BTW What makes your App's Flashlight the "brightest" - I don't believe there is anyway to change the intensity of the LED is there? Would it not be fairer to say the following:

"LED Flashlight - Same Brightness as other Flashlight apps for iPhone 4"