Too many errors on textDocument/documentHighlight & textDocument/signatureHelp

[s-kostyaev]

Language server generates too many errors on textDocument/documentHighlight and textDocument/signatureHelp and it's very noisy. Do we need this error notifications?
fsac-lsp-log.txt
fib.fsx.txt

[d4h0]

This makes fasautocomplete basically unusable without some kind of workaround.

In neovim I get 'No symbol information found' error messages on almost every cursor move. No other LSP server I've used behaves this way, so this seems to be an issue with fasautocomplete.

I've tried to figure out how to fix this, but I haven't even started to learn F# (at the moment, I struggle setting up a usable F# dev environment), so I'm probably not the best person to work on this.

[vain0x]

On documentHighlight: The server will send an InternalError error response instead of successful response with result null when requested position isn't at a symbol.

In code: The "No symbol" error is generated here.
It's converted here to an internal error response.
This pattern (raising an Error instead of empty) appears in other cases too.

[haodeon]

My workaround for Neovim is to disable the autocmd group for documentHighlight when the LSP client name is fsautocomplete.

Otherwise the error behaviour makes Neovim terrible to use with the constant error spam from moving the cursor around.