I have faced the issue on Xcode 15.0.1 version due to having two files (one is a model class while the other is a view) with the same name. It was solved by deleting one file after moving the content to a newly named file. The naming issue was solved and thus, the next run worked perfectly.

You may design a window inside a String variable with characters as you like inside a Swift file. To run that on the terminal (i.e. command line) on MacOS, follow the steps below: Compile the program by typing: swiftc YourFileName.swift Run the program by typing: ./YourFileName Note, Swift uses a compiler to boost the speed instead of an interpreter. In case you are on an OS other than MacOS, kindly check OS-specific doc on using Swift at swift.org.

It usually happens when the CPU does not properly get the instructions or simply can not execute. I had a similar encounter while solving the "Super Pow" challenge on Leetcode. The underlying CPU that Leetcode provided could calculate the pow() in my code up to a specific range and the same algorithm failed when the power was raised to 200 or more on a large Int base. So, this issue is mainly due to lack of computation power of a CPU while performing large computations as I can observe.