To fix go-remove-unused-imports

gistfile1.el

(defun my-go-unused-imports-lines ()
  ;; FIXME Technically, -o /dev/null fails in quite some cases (on
  ;; Windows, when compiling from within GOPATH). Practically,
  ;; however, it has the same end result: There won't be a
  ;; compiled binary/archive, and we'll get our import errors when
  ;; there are any.
  (reverse (remove nil
                   (mapcar
                    (lambda (line)
                      (when (string-match "^\\(.+\\):\\([[:digit:]]+\\): imported and not used: \".+\".*$" line)
                        (let ((error-file-name (match-string 1 line))
                              (error-line-num (match-string 2 line)))
                          (if (string= (file-truename error-file-name) (file-truename buffer-file-name))
                              (string-to-number error-line-num)))))
                    (split-string (shell-command-to-string
                                   (concat go-command
                                           (if (string-match "_test\.go$" buffer-file-truename)
                                               " test -c"
                                             " build -o /dev/null"))) "\n")))))
(advice-add 'go-unused-imports-lines :override #'my-go-unused-imports-lines)