I recommend using -fsanitize=undefined -fsanitize=integer if you can build with clang - it will print a warning when an unsigned int underflows which catches a

I recommend using -fsanitize=undefined -fsanitize=integer if you can build with clang - it will print a warning when an unsigned int underflows which catches a terrifying amount of similar bugs the first time it is run (there are a lot of false positives in hash functions, etc though but imho it's well worth using regularly)