failed to Go lang

[bon-ami]

current lsp.
nvim 0.3.8 on windows 10

open a go file, on opening & saving, it complains,

Error detected while processing function <SNR>166_on_text_document_did_save[5]..<SNR>166_ensure_flush[1]..lsp#utils#step#start[1]..<SNR>205_next[9]..<lambda>62[1]..<SNR>166_ensure_start[33]..lsp#client#start[1]..<SNR>206_lsp_start:
line 5:
E117: Unknown function: async#job#start
E15: Invalid expression: async#job#start(a:opts.cmd, { 'on_stdout': function('s:on_stdout'), 'on_stderr': function('s:on_stderr'), 'on_exit': function('s:on_exit'), })

part of my init.vim

"ale
let g:ale_completion_enabled = 1

"lsp
if executable('gopls')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'gopls',
        \ 'cmd': {server_info->['gopls', '-mode', 'stdio']},
        \ 'whitelist': ['go'],
        \ })
    autocmd BufWritePre *.go LspDocumentFormatSync
endif

"neomake
" When writing a buffer (no delay).
let g:neomake_open_list = 2
let g:neomake_serialize = 1
let g:neomake_serialize_abort_on_error = 1

"airline for ale
let g:airline#extensions#ale#enabled = 1

"jira-vim
"let g:jiraVimDomainName = "http://jira.fihbdc.com:8080"
"let g:jiraVimEmail = "weiyangxie@fih-foxconn.com"
"let g:jiraVimToken = ""

"plug
call plug#begin('~\AppData\local\nvim\plugged')
Plug 'vim-airline/vim-airline'
Plug 'neomake/neomake'
"Plug 'paulkass/jira-vim'
Plug 'dense-analysis/ale'
Plug 'fatih/vim-go'
Plug 'prabirshrestha/async.vim'
Plug 'prabirshrestha/vim-lsp'
call plug#end()

"neomake
call neomake#configure#automake('w')

**my other plugins**
AutoComplPop	
bufexplorer	
calendar	
DirDiff	
EasyGrep	
fencview	
fugitive	
fzf	
fzf.vim	
git_shade	
gundo	
indent-guides	
ingo	
matchit	
Nerd_Commenter	
NERD_tree	
obvious-resize	
rainbow_parentheses	
sessionman	
SrcExpl	
tabular	
tagbar	
taglist	
Trinity	
undotree	
vim-mark	
vim-markdown	
visualmark	
Vjde	
winmanager	
YankRing	

[bon-ami]

when I use :LspCodeAction or other :Lsp*, it says go not supported.

[thomasfaingnaert]

It seems you haven't installed async.vim. Did you run :PlugInstall after adding it to your vimrc?

[bon-ami]

After async.cim installed, no errors. But it does not function as expected. (I am using gopls.exe)
I came to use this because of fatih/vim-go#685 to show popup parameter info when typing.
But now it still does not show anything when typing. If :LspHover on a function name, it shows info on preview window above. I want it to be a popup window automatically.

Thank you for quick response

[thomasfaingnaert]

Do you mean that the parameter info is not displayed in the statusline? If so, that's not a feature of vim-lsp. LspHover opens in the preview window, or the floating/popup window on newer (Neo)vim.

[bon-ami]

since I am using the current stable version of neovim, I thought it should open a popup/floating window instead of preview window

[thomasfaingnaert]

Have you set g:lsp_preview_float to 1?

[clason]

Doesn't floating window require neovim v0.4.x (i.e., building from master or using nightlies)? It's not in stable (v.0.3.8) yet.

[bon-ami]

Doesn't floating window require neovim v0.4.x (i.e., building from master or using nightlies)? It's not in stable (v.0.3.8) yet.

correct. solved. perfect support from you guys. thanks a lot