Invalide function: define-hostmode

[ChloeZhou1997]

Hi, I am trying to configure the org-brain and my configuration looks the following:

(use-package org-brain
    :ensure t
    :init
    (setq org-brain-path "~/Notes/")
    :config
    (bind-key "C-c b" "~/Notes")
    (setq org-id-track-globally t)
    (setq org-id-locations-file "~/.emacs.d/.org-id-locations")
    (add-hook 'before-save-hook 'org-brain-ensure-ids-in-buffer)
    (setq org-brain-visualize-default-choices 'all)
    (setq org-brain-title-max-length 12)
    (setq org-brain-include-file-entries nil
	  org-brain-file-entries-use-title nil))

  ;; Allows you to edit entries directly from org-brain-visualize
  (use-package polymode
    :config
    (add-hook 'org-brain-visualize-mode-hook #'org-brain-polymode))

However, I receive the following error message from the warning section:

Error (use-package): polymode/:catch: Invalid function: define-hostmode

and if I run

  ;; Allows you to edit entries directly from org-brain-visualize
  (use-package polymode
    :config
    (add-hook 'org-brain-visualize-mode-hook #'org-brain-polymode))

The backtrace throws me with

Debugger entered--Lisp error: (invalid-function define-hostmode)
  define-hostmode(#<pm-host-chunkmode org-brain-hostmode> :mode org-brain-visualize-mode)
  #f(compiled-function () #<bytecode -0x11008be9a7eb8555>)()
  funcall(#f(compiled-function () #<bytecode -0x11008be9a7eb8555>))
  do-after-load-evaluation("/Users/zhouqiaohui/.emacs.d/elpa/polymode-20220820...")
  require(polymode nil t)
  (not (require 'polymode nil t))
  (if (not (require 'polymode nil t)) (display-warning 'use-package (format "Cannot load %s" 'polymode) :error) (condition-case err (progn (add-hook 'org-brain-visualize-mode-hook #'org-brain-polymode) t) ((debug error) (funcall use-package--warning274 :config err))))
  (condition-case err (if (not (require 'polymode nil t)) (display-warning 'use-package (format "Cannot load %s" 'polymode) :error) (condition-case err (progn (add-hook 'org-brain-visualize-mode-hook #'org-brain-polymode) t) ((debug error) (funcall use-package--warning274 :config err)))) ((debug error) (funcall use-package--warning274 :catch err)))
  (progn (use-package-ensure-elpa 'polymode '(t) 'nil) (defvar use-package--warning274 #'(lambda (keyword err) (let ((msg (format "%s/%s: %s" ... keyword ...))) (display-warning 'use-package msg :error)))) (condition-case err (if (not (require 'polymode nil t)) (display-warning 'use-package (format "Cannot load %s" 'polymode) :error) (condition-case err (progn (add-hook 'org-brain-visualize-mode-hook #'org-brain-polymode) t) ((debug error) (funcall use-package--warning274 :config err)))) ((debug error) (funcall use-package--warning274 :catch err))))
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  command-execute(eval-last-sexp)

How should I deal with the problem?

[Kungsgeten]

Hmm, it seems like org-mode tries to use functionality from polymode even though polymode isn't loaded yet. That shouldn't be the case, but I might be doing something wrong when checking if polymode is available.

Try moving polymode before org-brain in your init-file, or try adding :after polymode in the org-brain use-package declaration.

[pymander]

I'm seeing this error, too. I believe it is because define-hostmode is a macro instead of a function. I'm not sure how to fix the problem, but it is keeping me from using my brain!