Compilation mode error output parse not matching

Question

I've below code

(add-to-list 'compilation-error-regexp-alist 'kbd)
(add-to-list 'compilation-error-regexp-alist-alist
             '(kbd "^kmonad: Parse error at \\([0-9]+\\):\\([0-9]+\\):" 2 3))

And I want to parse

kmonad: Parse error at 36:1:
   |
36 | jdfkj
   | ^

But it doesn't match correctly in compilation buffer, I can't go to the line and column of the error, instead it points to first column of first line, and matches first regexp block as line number. But regexp is correct

Answer 1

The LINE and COLUMN entries (2 and 3 in your code) refers to the subgroup of the regexp. Your regexp only contains two subgroups, so they should be 1 and 2.

In addition, the first entry after the regexp is the filename (or nil), so it should be (REGEXP nil 1 2).