Fern showing error if it is opened during loading the session.vim (but works just fine)

[krehwell]

The error occur if the session saved is with the fern opened. and when trying to load that session with vim -S session.vim the errors pop up on opening as shown below:
image

it works just fine after pressing enter with the fern still opened as the session saved previously. however it's could maybe better if the errors does not pops up.

[lambdalisue]

It's Vim's feature. See :help persistent-undo and delete the undofile by yourself.

[jonescamilla]

I'm encountering the same issue. I'm also uncertain on how undo files are the issue or what lead to the issue. With undo files turned off, the undo files directory empty, and newly created sessions afterward. I still encounter the issue.

I've tried to natively save sessions and through plugins and encounter the exact same "error".

"fern://drawer:1/file:///Users/admin/git/dotfiles/nvim;width=25$" [Not edited] --No lines in buffer--

At times the session loads normally and I am able to use nvim like regular and on other instances fern covers the entire "document"

@krehwell were you able to find a solution? and @lambdalisue any additional hints?

Thank you in advance!

[krehwell]

no I haven't found any solution, I just let it be since the error just pop up but has no effect to my session project. maybe we can ignore some vim error on openbuf maybe? I dunno

[lambdalisue]

Hum... I thought it's undo-persistent feature thus deleting the file is enough to fix the issue If you didn't try that, try. Otherwise give me

• A MINIMAL vimrc to reproduce
• A MINIMAL steps to reproduce

Start from https://github.com/lambdalisue/fern.vim/issues/290#issuecomment-769325553

[jonescamilla]

Thank you both for your responses!

I'll comment a minimum nvim config to reproduce as soon as I'm free.

I should add that loading saved sessions does not give issues when fern is closed before saving the session: Fern open before saving leads to that issue. Fern closed before saving leads to no issues.

And thank you for this amazing tool!

[jonescamilla]

I've made a very bare repo that holds the init.vim and a readme that should walk you through the process. I was able to reproduce the error with that same repo. I've also included my additional fern configurations in the chance that they affect the error occurring.

[lambdalisue]

Please make that vimrc minimal first.

[jonescamilla]

Please make that vimrc minimal first.

Updated repo.

[lambdalisue]

If you are talking about the line above, that's Vim's feature. That line tells that the fern buffer has no content (while fern is asynchronous plugin) like "LICENSE" or "README.md" lines which is also restored buffers in my case.

[jonescamilla]

I now know that the issue is no longer in the scope of JUST fern.vim. But would you have a suggestion on how to disable such a notification for us? If not, I still appreciate the time and response!

Thank you

[lambdalisue]

I'm sorry but I've no idea. That message is produced by :edit {filename} command on Vim thus you may able to disable such message in some way I guess.

[Shougo]

You can disable the messages by shortmess option.

[Shougo]

      F don't give the file info when editing a file, like `:silent`
        was used for the command; note that this also affects messages
        from autocommands

[lambdalisue]

@jonescamilla

[iamvoidcoder]

Those of you who sorted the issue. Can you please share some details. I'm trying

set shortmess+=F

in my init.vim and it doesn't suppress "--No lines in buffer--" at startup :(