Intermittent errors with deoplete/neovim/deoplete-solargraph

[bowmanmike]

I've been using solargraph with the deoplete source for neovim for a few weeks with no problems. Last week I started seeing errors occasionally when I'm editing a Ruby file. It seems to be related to the solargraph server itself.

[deoplete] NoneType: None
{'status': 'err', 'message': "undefined method `docstring' for #<Solargraph::Pin::Symbol:0x007ff33a810710>\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/solargraph-0.20.0/lib/solargraph/suggestion.rb:175:in `pull'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/solargraph-0.20.0/lib/so
largraph/server.rb:104:in `block (2 levels) in <class:Server>'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/solargraph-0.20.0/lib/solargraph/server.rb:104:in `map'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/solargraph-0.20.0/lib/solargraph/server.rb:104:in `block in <class:Server
>'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1634:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1634:in `block in compile!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/l
ib/sinatra/base.rb:992:in `block (3 levels) in route!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1011:in `route_eval'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:992:in `block (2 levels) in route!'\n/Users/mbow
man/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1039:in `block in process_route'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1037:in `catch'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatr
a/base.rb:1037:in `process_route'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:990:in `block in route!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:989:in `each'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems
/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:989:in `route!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1096:in `block in dispatch!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `block in invoke'\n/Users
/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `catch'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `invoke'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1
093:in `dispatch!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:924:in `block in call!'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `block in invoke'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3
.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `catch'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `invoke'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:924:in `call!'\n/Users/mbowman/.rbenv/versions/2.
3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:913:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/xss_header.rb:18:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/path
_traversal.rb:16:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/json_csrf.rb:26:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/base.rb:50:in `call'\n/Users/mbowman/.rbenv/versions/2.
3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/base.rb:50:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-protection-2.0.1/lib/rack/protection/frame_options.rb:31:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/
.3.0/gems/rack-2.0.4/lib/rack/null_logger.rb:9:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.4/lib/rack/head.rb:12:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/show_exceptions.rb:22:in `call'\n/Users/mbowman/.rbenv/versions/2.3.
1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:194:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1957:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1501:in `block in call'\n/Users/mb
owman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1728:in `synchronize'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/sinatra-2.0.1/lib/sinatra/base.rb:1501:in `call'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.4/lib/rack/handler/webric
k.rb:86:in `service'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/2.3.0/webrick/httpserver.rb:140:in `service'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/2.3.0/webrick/httpserver.rb:96:in `run'\n/Users/mbowman/.rbenv/versions/2.3.1/lib/ruby/2.3.0/webrick/server.rb:296:in `block in start_thread'"}.

[castwide]

It looks like that plugin is using the web server, which is currently a candidate for deprecation. It might receive ongoing support in a separate gem if there's enough need for it, but I've been encouraging clients to switch to the language server instead.

In the meantime, you might get better results with an earlier version. When an issue arose in the Atom package (which also uses the legacy web API), I was able to get it working with gem version 0.17.4.

[castwide]

Related issue: uplus/deoplete-solargraph#5

I'm going to close this one for now, as it's an integration issue instead of a bug in Solargraph itself. I'm happy to help with updating clients to use LSP, but that can be handled in other, more specific issues.