Xcode: EXC_BREAKPOINT (EXC_ARM_BREAKPOINT, subcode=0xe7ffdefe)

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() % <someInt>)

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

Int(UInt32(arc4random()) % UInt32(<someInt>))

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

I ran into this problem, in iPhone 5, which is iOS 10.3.3.

let date = Date()// Crashes in `iPhone 5`, but works in `iPhone 5s`.let time: Int = 1000 * Int(date.timeIntervalSince1970) //< Crash due to cast `Double` to `Int`// This crashes in `iPhone 5`, and `iPhone 5s` too.let time: Int32 = 1000 * Int32(date.timeIntervalSince1970)// It works fine in `iPhone 5`, and `iPhone 5s`.let time: Int64 = 1000 * Int64(date.timeIntervalSince1970)

In my case, this ended up being from a bit overflow issue if you cast too large of a number into too small of a type. E.g. Int(someNumber) if someNumber was an Int64 type.

iPhone 5c break at the offending line of code: