App Crashes Only On Testflight Build

Question

I have created an app on swift and tested it extensively using iPhone 6, iPhone 6 plus and iPhone 5 devices and all the simulators offered in Xcode. The app runs fine and do

Answer 1

If anyone else is having the same problem, here's what my fix was:

I finally got the problem down to a loop with a if statement, akin to this -

while(condition)
{
    if (check)
    {
        code!
    }
    //There was no code here
}

Notice that there's no code at the end of the loop (where the comment is). Once I added a random bit of code (in this case, incrementing a variable for output), the problem stopped.

while(condition)
{
    if (check)
    {
        code!
    }
    i += 1;
    output statement
}

I think this has to be a compiler error, or else my "fix" shouldn't be a fix at all. But here it is in case it helps anyone else!