error right after losing???

[duckcantcode]

thread 'main' panicked at 'index out of bounds: the len is 20 but the index is 18446744073709551615', src\main.rs:158:13

[duckcantcode]

starting to think it was one of these: https://www.johndcook.com/blog/2019/05/20/cosmic-rays-flipping-bits/ . literally makes no sense.