Xcode: EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe)

Question

I\'m getting an EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe) error while running my app on a iOS7 device. The thing is, it runs smoothly on iOS7 simulator.

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Answer 1

I ran across this issue today when testing some Swift code against an old iPad 2 (I think it's an iPad 2 -- it's model MD368LL/A), running iOS 8.1.3. It turned out that the problem existed everywhere that I was calling something like:

Int(arc4random() % )

This worked fine on later iPads, iPhone5S, iPhone6, etc. Fixed by changing code to:

Int(UInt32(arc4random()) % UInt32())

I think it was a register overflow on the older hardware.