Unexpected errors on didOpen and didChange, LSP entirely not working.

[AlexSWall]

Describe the bug
Starting my text editor (neovim) with the LSP attached immediately gives me an error of the form

LSP[erlangls]: Error INVALID_SERVER_MESSAGE: {
  error = {
    code = -32001,
    message = "Unexpected error while textDocument/didOpen"
  },
  jsonrpc = "2.0"
}

and I get the same but with didChange instead of didOpen on typing anything. Every other LSP is working with the same setup so I believe it to be specific to erlang_ls.

To Reproduce
I am simply opening the text editor with the LSP attached.

Context

• erlang_ls version (tag/sha): cfab726
• Editor used: neovim v0.7 (on Ubuntu 18.04).
• LSP client used: nvim-lspconfig (latest)

You can see my server.log here.

[robertoaloi]

What I think is happening is that the IDE is sending a didOpen request for a file which is not (yet?) readable from disk. I checked the specs and they are very clear in the sense that the language server should not try to access the file from disk:

The server must not try to read the document’s content using the document’s Uri.

Erlang LS erroneously does that. I will prepare a fix and ping you once it's available, so you can try if it works.

Thanks for reporting @AlexSWall !

[AlexSWall]

Yep, seems like that fixed it, thanks!