I'm not sure you understand what I mean -- the "unique to a line" message is actually a descriptive message not a line number. errors.WithStack gives you the fi

I'm not sure you understand what I mean -- the "unique to a line" message is actually a descriptive message not a line number. errors.WithStack gives you the file, line, and function name for free and works with handle -- my complaint is that giving descriptive and stacked error messages will be very hard with handle (but is not fundamentally hard with Rust's map_err even though their error packages aren't as well-developed as Go's from my experience).