My application crashes each and every time I try to step over a call. Without debugger it works fine.
Also, when I run the app in simulator it woks fine with or without debugger.
Recently I upgraded my Mac OS X 10.8 to 10.9 (Mavericks). There were no issues before the upgrade.
What causes the issue and how could I fix it?
Below is the back trace. My app uses ARC. I have enabled zombies and added exception breakpoint but no zombies where detected and exception breakpoint is never triggered.
* thread #1: tid = 0x2503, 0x00000000, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
frame #0: 0x00000000
frame #1: 0x35e170c4 UIKit`-[UIApplication sendAction:to:from:forEvent:] + 72
frame #2: 0x35e17076 UIKit`-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
frame #3: 0x35e17054 UIKit`-[UIControl sendAction:to:forEvent:] + 44
frame #4: 0x35e1690a UIKit`-[UIControl(Internal) _sendActionsForEvents:withEvent:] + 502
frame #5: 0x35e16e00 UIKit`-[UIControl touchesEnded:withEvent:] + 488
frame #6: 0x35d3f5f0 UIKit`-[UIWindow _sendTouchesForEvent:] + 524
frame #7: 0x35d2c800 UIKit`-[UIApplication sendEvent:] + 380
frame #8: 0x35d2c11a UIKit`_UIApplicationHandleEvent + 6154
frame #9: 0x37a1e5a2 GraphicsServices`_PurpleEventCallback + 590
frame #10: 0x37a1e1d2 GraphicsServices`PurpleEventCallback + 34
frame #11: 0x33ef9172 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
frame #12: 0x33ef9116 CoreFoundation`__CFRunLoopDoSource1 + 138
frame #13: 0x33ef7f98 CoreFoundation`__CFRunLoopRun + 1384
frame #14: 0x33e6aebc CoreFoundation`CFRunLoopRunSpecific + 356
frame #15: 0x33e6ad48 CoreFoundation`CFRunLoopRunInMode + 104
frame #16: 0x37a1d2ea GraphicsServices`GSEventRunModal + 74
frame #17: 0x35d80300 UIKit`UIApplicationMain + 1120
frame #18: 0x000faac8 MyApp`main(argc=1, argv=0x2fd0fd08) + 116 at main.m:16
EDIT:
I have latest Xcode Version 5.0.1 (5A2053).
I have created new app from scratch and ran it without issues. Then I put a breakpoint in ViewController's viewDidLoad and tried to step over. Here I got another crash
* thread #1: tid = 0x2503, 0x3bb9d7c4 libobjc.A.dylib`objc_msgSendSuper2 + 4, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=1, address=0x4)
frame #0: 0x3bb9d7c4 libobjc.A.dylib`objc_msgSendSuper2 + 4
frame #1: 0x000b913a test`-[ViewController viewDidLoad](self=0x1cda5c70, _cmd=0x361bd5db) + 62 at ViewController.m:19
frame #2: 0x35d4b594 UIKit`-[UIViewController loadViewIfRequired] + 364
frame #3: 0x35d8bd78 UIKit`-[UIWindow addRootViewControllerViewIfPossible] + 64
frame #4: 0x35d87aec UIKit`-[UIWindow _setHidden:forced:] + 364
frame #5: 0x35dc91e8 UIKit`-[UIWindow makeKeyAndVisible] + 60
frame #6: 0x35d8c83e UIKit`-[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1666
frame #7: 0x35d8484a UIKit`-[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 698
frame #8: 0x35d2cc38 UIKit`-[UIApplication handleEvent:withNewEvent:] + 1004
frame #9: 0x35d2c6cc UIKit`-[UIApplication sendEvent:] + 72
frame #10: 0x35d2c11a UIKit`_UIApplicationHandleEvent + 6154
frame #11: 0x37a1e5a2 GraphicsServices`_PurpleEventCallback + 590
frame #12: 0x37a1e1d2 GraphicsServices`PurpleEventCallback + 34
frame #13: 0x33ef9172 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
frame #14: 0x33ef9116 CoreFoundation`__CFRunLoopDoSource1 + 138
frame #15: 0x33ef7f98 CoreFoundation`__CFRunLoopRun + 1384
frame #16: 0x33e6aebc CoreFoundation`CFRunLoopRunSpecific + 356
frame #17: 0x33e6ad48 CoreFoundation`CFRunLoopRunInMode + 104
frame #18: 0x35d83484 UIKit`-[UIApplication _run] + 668
frame #19: 0x35d80300 UIKit`UIApplicationMain + 1120
frame #20: 0x000b93bc test`main(argc=1, argv=0x2fd51d30) + 116 at main.m:16
frame #21: 0x3bfd9b20 libdyld.dylib`start + 4
EDIT 2:
Greg Clayton in the XCode 5 Crashes while running the app on device suggests following
Others have seen this issue.
A few things to try:
1 - Reboot your device and try again. The theory is an old developer disk image is already mounted and won't be unmounted until you reboot.
2 - Re-install the OS on the device
Hopefully #1 fixes your issue. Others have done #2 and had their issue fixed, but hopefully it doesn't require an OS re-install.
I did both and it didn't help.
I tried to use another device and it made a difference. Exceptions are still there if I use iPod Touch with iOS 6.1 but iPad with iOS 7.0.2 works fine.
So, it looks like the issue is related to the iOS version installed on the device. I am still not sure what to do to fix it.
EDIT 3:
My Command Line Tools version matches my Xcode version (I have only one version of Command Line Tools, actually).
The issues is probably not related to the code being debugged. It crashes with newly created Single View Application created by Xcode. And it crashes when stepping over trivial code:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
I have asked on Apple Developer Forum and got following response from Jason Molenda:
We're tracking a bug that sounds like what you're seeing here. It is a subtle timing issue that requires a slightly slower host machine or a slightly slower device to hit. It is primarily iPhone 4 and similar that will see this with iOS 7. With iOS 6, iPhone 4 and iPhone 3GS devices are most likely to experience it. ... This issue will only happen with Xcode 5.0.1.
So, it seems like it's a bug in Xcode.
