Re: Vim8.2.2154 html filetype detection cause error incompatiblity with vim9script

Hi Bram,

• The only line I got grepping in all my Vim distribution is commented in _vimrc.

• To reproduce just use the plugin  GitHub - xavierchow/vim-sequence-diagram: A Vim plugin for previewing sequence diagram in a browser 
• Try generating sequence diagram by pressing <Leader>t onto a buffer diagram.seq containing these lines

title: some title
Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks! 

Thank you.

Le samedi 19 décembre 2020 à 13:32:55 UTC+1, Bram Moolenaar a écrit :

Tony wrote:

> On Fri, Dec 18, 2020 at 11:57 AM Ni Va <niva...@gmail.com> wrote:
> >
> > Hi,
> >
> > When opening html file in new buffer while my _vimrc is written in vim9script,
> > this message appears:
> >
> > Messages maintainer: Bram Moolenaar
> > "~\Desktop\filetype.vim.html" 2315L, 216123B
> > Error detected while processing BufRead Autocommands for "*.html"..function dist#ft#FThtml[13]..FileType Autocommands for "html":
> > E1126: Cannot use :let in Vim9 script
> > E1126: Cannot use :let in Vim9 script
>
> IOW, a script (without vim9script in it) sourced from an autocommand
> triggered from Vim9 script is erroneously interpreted as if it were
> itself a Vim9 script.

What is the line in the vimrc then?


The error points to the FThtml() function in
runtime/autoload/dis/ft.vim,
the command:
setf FALLBACK html

I guess there is an "au Filetype html" command that is triggered then,
but I can't reproduce a problem with that.

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