ftplugin/python.vim: E518: Unknown option: ]\\?def\\|class\\)

[skywind3000]

Steps to reproduce

update to vim v9.1.0411:

edit reproduce.vim:

set nocompatible
filetype plugin on

start vim:

vim -u reproduce.vim

edit an arbitrary python file:

:edit foo.py

and you will see:

Error detected while processing BufNewFile Autocommands for "*.py"..FileType Autocommands for "*"..function <SNR>25_LoadFTPlugin[18]..script /usr/local/opt/share/vim/vim
91/ftplugin/python.vim:
line   17:
E518: Unknown option: ]\\?def\\|class\\)
Press ENTER or type command to continue

screen capture:

I believe it was introduced by 86f6e2c

Expected behaviour

no exception.

Version of Vim

9.1.411

Environment

OS: Both Windows and Linux
Terminal: no matter terminal vim or gvim

Logs and stack traces

No response

[skywind3000]

@tpict , can you confirm this ?

[k-takata]

It has been already fixed in 7961210. Please try v9.1.0412.
Thanks.