Error message '_BSMachError: (os/kern) invalid capability (20)'

Based on the https://forums.developer.apple.com/thread/15683:

Change "Localization native development region" in info.plist to United States instead of en.

Updated: Then you can revert these changes back.

I also ran into the _BSMachError console errors while deep linking into the Settings app on iOS 9 from a UIAlertController action. A dispatch_async solved my problem:

[aAlertVC addAction:[UIAlertAction actionWithTitle:@"Settings" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
    dispatch_async(dispatch_get_main_queue(), ^{
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
    });
}]];

Ok, I haven't pinned it down completely, but this will get you 99% of the way there. I'm using a third party map control from ESRI, and something about it doesn't like one of these drawing settings in the Attributes Inspector. I haven't tried each setting individually to see which setting it is, but when I turned all of them off (in the red box), everything worked like a charm, and I quit getting the error message above in the console. If and when I get time to nail it down to the precise setting or combination of settings, i'll update the answer.

It's crazy but for me the solution was just to remove all breakpoints in the file where the error occured.

As for the cause? I think I accidentally hit a shortcut key to create a breakpoint in the current line. Because that was unintended I hit the same shortcut key again to delete it.

Oh my dear XCode...

I was getting the same errors...

_BSMachError: (os/kern) invalid capability (20)
_BSMachError: (os/kern) invalid name (15)

I was calling openURL() from a UIAlertAction

alert.addAction(UIAlertAction(title: actionTitle, style: .Default) {
    UIApplication.shared.openURL(url)
 }

Deferring execution of the block until the next run loop fixed it...

alert.addAction(UIAlertAction(title: actionTitle, style: .Default) {
    OperationQueue.main.addOperation {UIApplication.shared.openURL(url)}
 }