If you encounter debug does not crash, install ipA package crashes while iOS12.0 does not crash before, after if you get the crash cause as follows com.xxx.yyy; pid: -1> with error: Error Domain=BKSProcessErrorDomain Code=1 “Unable to bootstrap process with bundleID com.xxx.yyy” UserInfo={NSLocalizedDescription=Unable to bootstrap process with bundleID com.xxx.yyyy, BKSProcessExitReason=0, NSLocalizedFailureReason=Failed to start job, NSUnderlyingError=0x2839cbe10 {Error Domain=NSPOSIXErrorDomain Code=3 “No such process” UserInfo={BKLaunchdOperation=launch_get_running_pid_4SB, NSLocalizedDescription=Unable to get pid for label UIKitApplication:com.xxx.yyy[0x3119][58], BKLaunchdJobLabel=UIKitApplication:com.xxx.yyy[0x3119][58], NSLocalizedFailureReason=No such process}}, BKSProcessJobLabel=UIKitApplication:com.xxx.yyy[0x3119][58], BSErrorCodeDescription=bootstrap-failed}

So I need to introduce to you an article at https://www.jianshu.com/p/3afed6fbfca4