Languageclient-neovim: invalid type: integer `0`, expected string or map

[nabezokodaikon]

• Did you upgrade to latest plugin version?
  Yes

• Did you upgrade to/compile latest binary? Run shell command
  Yes

  bin/languageclient --version to get its version number.
  languageclient 0.1.156 90e49e587fc700c81cd21529e773b7f863dfc958

• (Neovim users only) Did you check output of :checkhealth LanguageClient?
  OK

• Did you check [troubleshooting]?
  Yes

Describe the bug

A clear and concise description of what the bug is.
After updating to the latest version in dein.vim, the title error occurred.

Environment

• neovim/vim version (nvim --version or vim --version):
  
  
  
  • NVIM v0.4.3
  
  
• This plugin version (git rev-parse --short HEAD):
  
  
  
  • 90e49e5
  
  
• This plugin's binary version (bin/languageclient --version):
  
  
  
  • languageclient 0.1.156 90e49e587fc700c81cd21529e773b7f863dfc958
  
  
• Minimal vimrc content (A minimal vimrc is the smallest vimrc that could
  reproduce the issue. Refer to an example here):

set hidden  
set completeopt=menu    
set signcolumn=yes  

let g:LanguageClient_useVirtualText = 0 
let g:LanguageClient_autoStart = 1
let g:LanguageClient_loadSettings = 1

let g:LanguageClient_serverCommands = { 
    \ 'rust': ['~/.cargo/bin/rustup', 'run', 'stable', 'rls'],  
    \ } 

let $RUST_BACKTRACE = 1
let g:LanguageClient_loggingLevel = 'INFO'
let g:LanguageClient_virtualTextPrefix = ''
let g:LanguageClient_loggingFile =  expand('~/.local/share/nvim/LanguageClient.log')
let g:LanguageClient_serverStderr = expand('~/.local/share/nvim/LanguageServer.log')

• Language server link and version:

To Reproduce

Steps to reproduce the behavior:

1. $ git clone -b getting-started https://github.com/nabezokodaikon/rust-study.git
2. $ cd rust-study/ch03/bitonic-sorter
3. $ nvim src/first.rs
4. See error
5. 23:50:15 WARN unnamed src/language_server_protocol.rs:2389 Failed to start language server automatically. invalid type: integer0, expected string or map

Current behavior

LanguageClient does not start.

Expected behavior

LanguageClient starts.

Additional context

It worked with tag v0.1.153.

[zekzekus]

I was just about to click new issue button :) Same problem here. I rolled back one commit back (d273439c1c05a599423c278fcad95df6564d7b8a) language server starts without any problem.

[martskins]

There was a breaking change regarding the LanguageClient_useVirtualText option, it now takes a string instead of a number. See https://github.com/autozimu/LanguageClient-neovim/blob/next/doc/LanguageClient.txt#L343 for the accepted values.

[nabezokodaikon]

There was a breaking change regarding the LanguageClient_useVirtualText option, it now takes a string instead of a number. See https://github.com/autozimu/LanguageClient-neovim/blob/next/doc/LanguageClient.txt#L343 for the accepted values.

Thank you! Confirmed to work!

[ReggieMarr]

There was a breaking change regarding the LanguageClient_useVirtualText option, it now takes a string instead of a number. See https://github.com/autozimu/LanguageClient-neovim/blob/next/doc/LanguageClient.txt#L343 for the accepted values.

This also broke for me. If we broke backwards compatibility shouldn't there be more transparency (in the changelog or error code)?