company: backend company-capf fails with json unmarshal error.

[mrniranjan]

I am using emacs with remote gopls server (Running inside a container) and configured lsp-mode on my emacs. When i open any go file and type "fmt. " the following error is displayed and doesn't show any functions of fmt.

Company: backend company-capf error "unmarshaling result: json: cannot unmarshal object into Go struct field CompletionItem.items.documentation of type string" with args (candidates )

My emacs configuration:

(setq package-list '(yasnippet flycheck go-mode lsp-mode lsp-ui))                                                                                                                                             
  66                                                                                                                                                                                                               
  67 ;; install the missing packages                                                                                                                                                                               
  68 (dolist (package package-list)                                                                                                                                                                                
  69   (unless (package-installed-p package)                                                                                                                                                                       
  70       (package-install package)))                                                                                                                                                                             
  71                                                                                                                                                                                                               
  72 (add-hook 'go-mode-hook (lambda ()                                                                                                                                                                            
  73     (setq tab-width 4)))                                                                                                                                                                                      
  74                                                                                                                                                                                                               
  75 ;; Go - lsp-mode                                                                                                                                                                                              
  76 ;; Set up before-save hooks to format buffer and add/delete imports.                                                                                                                                          
  77 (use-package lsp-mode                                                                                                                                                                                         
  78    :ensure t                                                                                                                                                                                                  
  79    :init                                                                                                                                                                                                      
  80    (setq lsp-gopls-server-args '("--remote=0.0.0.0:7050"))                                                                                                                                                    
  81    :commands (lsp lsp-deferred)                                                                                                                                                                               
  82    :hook (go-mode . lsp-deferred)                                                                                                                                                                             
  83    :config                                                                                                                                                                                                    
  84    ;; Set up before-save hooks to format buffer and add/delete imports.                                                                                                                                       
  85    ;; Make sure you don't have other gofmt/goimports hooks enabled.                                                                                                                                           
  86    (defun lsp-go-install-save-hooks ()                                                                                                                                                                        
  87       "Comment lsp-go-install-save-hooks."                                                                                                                                                                    
  88       (add-hook 'before-save-hook #'lsp-format-buffer t t)                                                                                                                                                    
  89       (add-hook 'before-save-hook #'lsp-organize-imports t t))                                                                                                                                                
  90    (add-hook 'go-mode-hook #'lsp-go-install-save-hooks)                                                                                                                                                       
  91    )                                                                                                                                                                                                          
  92                                                                                                                                                                                                               
  93 ;; Start LSP Mode and YASnippet mode                                                                                                                                                                          
  94 (add-hook 'go-mode-hook #'yas-minor-mode)                                                                                                                                                                     
  95                                                                                                                                                                                                               
  96 (require 'yasnippet)                                                                                                                                                                                          
  97 (yas-global-mode 1)                                                                                                                                                                                           
  98                                                                                                                                                                                                               
  99                                                                                                                                                                                                               
 100 (use-package company                                                                                                                                                                                          
 101   :hook (scala-mode . company-mode)                                                                                                                                                                           
 102   :config                                                                                                                                                                                                     
 103     (setq lsp-completion-provider :capf))    

Any hints/ideas on how i could resolve the issue.

[yyoncho]

Collect the data as described when you start a bug report.

[mrniranjan]

I am not exactly sure if this is a bug or something wrong with my configuration, hence started it as a discussion. The issue i suspect is that module lookup is not happening. I assume that's what is happening and as a result of it , i suspect the above is happening. I have check other issues around this and it was mentioned that it could happen because of networking issue, I tried checking if the container can access the network and that seems to work fine.

The setup here,
I have a host where emacs is configured with lsp-mode and a container is running where the gopls is running with below parameters:
/root/go/bin/gopls serve -rpc.trace --logfile=/tmp/mylog -listen="0.0.0.0:7050" -debug=0.0.0.0:6060

The workspace directory where my go source exists is mounted on to container as (read only). I made sure that it's mounted with similar directory tree on the container.

I am suspecting, i am missing something very basic here. This is first time i am trying this kind of setup.

[mrniranjan]

closing this discussion as the issue got resolved , the issue was that the project directory mounted on container had permission issues. Once the permissions were fixed , issue was resolved.