0x8BADF00D and others crashes
From Wikipedia: A crash (or system crash) in computing is an event in which a computer or a program (such as a software application or an operating system) ceases to function properly, often exiting after encountering errors. The program responsible may appear to freeze or hang until a crash reporting service documents details of the crash. […]
Xcode – power of breakpoints
A collection of useful Xcode debugging technique, using Breakpoints and LLDBdebugger.