This class of issues is so common in my personal experience that very often I intentionally introduce some sort of panic/assertions in the place that I want to

This class of issues is so common in my personal experience that very often I intentionally introduce some sort of panic/assertions in the place that I want to fix, just to be 100% sure I'm a) editing the right source b) the tooling (compiler, ci, ...) is actually doing what I expect. Most of the time it's unnecessary, but when it catches such issues it saves countless hours of frustration.