Flycheck fails in an indirect region buffer about flycheck HOT 2 OPEN

:command ("eslint" ;; ... 
          "--stdin" "--stdin-filename" source)

(defun bvr-flycheck-eslint--find-working-directory (_checker)
  "Look for a working directory to run ESLint CHECKER in.

This will be the directory that contains the `node_modules'
directory.  If no such directory is found in the directory
hierarchy, it looks first for `.eslintignore' and then for
`.eslintrc' files to detect the project root."
  (let* ((file (or (buffer-file-name) default-directory)))
    (when file
      (or (locate-dominating-file file "node_modules")
          (locate-dominating-file file ".eslintignore")
          (locate-dominating-file file ".eslintrc")
          (locate-dominating-file file ".eslintrc.js")
          (locate-dominating-file file ".eslintrc.json")
          (locate-dominating-file file ".eslintrc.yaml")
          (locate-dominating-file file ".eslintrc.yml")))))



(flycheck-define-checker bvr-javascript-eslint
  "A Javascript syntax and style checker using eslint.

See URL `https://eslint.org/'."
  :command ("eslint" "--format=json"
            (option-list "--rulesdir" flycheck-eslint-rules-directories)
            (eval flycheck-eslint-args)
            "--stdin" "--stdin-filename" source)
  :standard-input t
  :error-parser flycheck-parse-eslint
  :enabled (lambda () (flycheck-eslint-config-exists-p))
  :modes (js-mode js-jsx-mode js2-mode js2-jsx-mode js3-mode rjsx-mode
                  typescript-mode js-ts-mode typescript-ts-mode tsx-ts-mode)
  :working-directory bvr-flycheck-eslint--find-working-directory
  :verify
  (lambda (_)
    (let* ((default-directory
             (flycheck-compute-working-directory 'bvr-javascript-eslint))
           (have-config (flycheck-eslint-config-exists-p)))
      (list
       (flycheck-verification-result-new
        :label "config file"
        :message (if have-config "found" "missing or incorrect")
        :face (if have-config 'success '(bold error))))))
  :error-explainer
  (lambda (err)
    (let ((error-code (flycheck-error-id err))
          (url "https://eslint.org/docs/rules/%s"))
      (and error-code
           ;; skip non-builtin rules
           (not ;; `seq-contains-p' is only in seq >= 2.21
            (with-no-warnings (seq-contains error-code ?/)))
           `(url . ,(format url error-code))))))


(add-to-list 'flycheck-checkers 'bvr-javascript-eslint)