Hello, Fredrik Salomonsson writes: > When I launch emacs (emacs-next) with the emacs-lua-mode package, I'm > getting this error > "Error (use-package): lua-mode/:catch: Unknown rx form ‘symbol’" > > It works when I let emacs download it from melpa. I tried updating > emacs-lua-mode to 20200508, which is the same version as on melpa. > > Still the same issue. > > Could this be an issue that it's using emacs-minimal-26.3 to byte compile > the files? Where I'm using emacs-next aka emasc-27.0. Judging by this issue > [1] the rx package has gone through some changes in 27.0. This seems to be reported upstream as https://github.com/immerrr/lua-mode/issues/155 You may be right. Files byte-compiled with Emacs 26 may not be compatible with Emacs 27. I don't know what can be done on Guix's side, tho. > I've attached the backtrace and the patch for the latest > emacs-lua-mode. Could you send another bug report for the package update? Regards, -- Nicolas Goaziou