A sanitizer or static analysis or any other tool can unconditionally give you a warning/error on signed integer overflow. Whereas that's invalid for unsigned integers as they have well-defined behavior, and things depend on said overflow (hashing, bitwise magic, temporary wrapping that unwraps later, etc).
Ideally there'd be a third type for unsigned-non-wrapping-integer (and llvm even supports a UB-on-unsigned-wrapping flag for arith ops in its IR that largely goes unused for C/C++), but alas such doesn't exist. Half-relatedly, this previously appeared as a discussion point on Linux (though Linus really did not like the concept of multiple unsigned types and as such it didn't go anywhere iirc).
Ideally there'd be a third type for unsigned-non-wrapping-integer (and llvm even supports a UB-on-unsigned-wrapping flag for arith ops in its IR that largely goes unused for C/C++), but alas such doesn't exist. Half-relatedly, this previously appeared as a discussion point on Linux (though Linus really did not like the concept of multiple unsigned types and as such it didn't go anywhere iirc).