If the programmer can rely on your behavior, i.e. its being caught, then... that's not really undefined behavior, then. The entire point of undefined behavior

If the programmer can rely on your behavior, i.e. its being caught, then... that's not really undefined behavior, then. The entire point of undefined behavior is that anything can happen. Wrap-around, segmentation faults, elided security checks or even ravenous polar bears, anything goes, and you can't know in advance what will.