I hate using ^ to indicate an offending position on a line. For those unfamiliar, the idea is that you display two lines, the erroneous one, and one full of spaces, with a single ^ in it, where the ^ is directly underneath the offending character. This is bad for accessibility and screen readers. They read that the ^ is here, but actually finding out what the wrong character is is problematic. Python does this, I think Rust too, and now Elm. Just provide a column number next to the line number, just like Golang does. Any decent editor will let me check what column I'm on. The ^ can, of course, be kept for the rest, but the column number would be a welcome addition.