filetype not detected in v0.46.0-20240102.233758

[songcai]

Since v0.46.0-20240102.233758, VimR has problem detecting filetypes. After opening a new VimR process, when I open the first file, the filetype is properly detected and syntax highlighting works properly. However, when I open any other file after the first one, the filetype is not detected. If I use ":set filetype" in VimR, I get "filetype=". As a consequence, syntax highlighting does not work at all.

I have never had such a problem in earlier versions.

[mgrubb]

I'm having the reverse of this problem. When I open one file the file detection isn't triggering, but if I open subsequent files in the same window, they all detect properly. (same version as reported above) on macOS 13.6.3 22G436 x86_64.

[georgeharker]

I'm sorry, I can't repro this.

[songcai]

I unloaded all plugins and removed all personal settings, but still have the problem. The following is a minimal example:
(1) Make sure that there is nothing in $HOME/.config/nvim/init.vim file (i.e., make it an empty file). This way, I know that nothing outside VimR itself is having an effect.
(2) make a "test.md" file with the following single line as content, and save:
* Some text
(3) Quit VimR 0.46.0 completely if you have it open. Then double click test.md to open it using VimR 0.46.0. You should be able to see colors for the HTML code part. And if you use ":set filetype", you should see "filetype=markdown".
(4) Close the file but do not quit VimR 0.46.0. Then open the same file again using VimR 0.46.0. This time I cannot see any color, and if I use ":set filetype", I get "filetype=" without "markdown".

I tested on a Macbook Pro and a Macbook Air, both with Intel CPU and running Sonoma 14.2.1. On both computers, I get the same result. I have the same problem on the nightly build, but I do not have this problem in VimR 0.45.5. I saw "Improve rendering performance slightly" in the release note of 0.46.0 and I wonder if this note is related to the problem.

[georgeharker]

Are there any messages (:messages) sometimes issues with startup files don't show obviously

[songcai]

There are no messages.

[songcai]

I just realize that the content of the "test.md" file in (2) of my minimal example is not showing correctly because it has HTML code. I am attaching the file:
test.md

[carlmueller]

This bug appears to be fixed in Version 0.46.1 (20240114.181346).

[songcai]

The bug remains in Version 0.46.1 (20240114.181346) for me.

[rainux]

I did a completely clean install of VimR (AppCleaner automatically remove the preferences .plist file and state folder of VimR), move away ~/.config/nvim, ~/.local/share/nvim, ~/.local/state/nvim, the problem still persist.

It is not always can't detect filetype, it comes randomly and make debug a bit harder.

[mageekguy]

Hi everyone!
I have exactly the same problem: Filetype is set to empty string so there is no syntax highlighting (I'm using 0.46.1).

[mageekguy]

Hi!

Maybe related to neovim/neovim#19216.
FYI, set g:do_legacy_filetype=1 in my init.vim seems to have fixed the problem.

[carlmueller]

After adding g:do_legacy_filetype=1 to init.vim and starting vimr, I get the message Pattern not found: do_legacy_filetype=1 and it doesn't fix the problem for me.