Neovim: Error caught in request handler of autocmd after opening scala file

[koslambrou]

Yes, I've seen #340 but it doesn't help.
I also couldn't find any helpful in the Getting Started and Troubleshooting page of Ensime.

I installed Neovim as told here for Ubuntu 16.04.
I also installed websocket-client, sexpdata and neovim python package for both python 2.7 and 3.5.

Here is the neovim :version command:

:version
NVIM 0.2.0-dev  
Build type: RelWithDebInfo
Compilation: /usr/bin/x86_64-linux-gnu-gcc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wconversion -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -O2 -g -DDISABLE_LOG -Wall -Wextra -pedantic 
-Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wvla -fstack-protector-strong -fdiagnostics-color=auto -DINCLUDE_GENERATED_DECLARATIONS -DHAVE_CONFIG_H -D_GNU_SOURCE -I/build/neovim-RVcgEA/neovim-0.
1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/build/config -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/src -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git20170101153
0+3003+22~ubuntu16.04.1/.deps/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/.deps/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003
+22~ubuntu16.04.1/.deps/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/.deps/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ub
untu16.04.1/.deps/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/.deps/usr/include -I/usr/include -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3
003+22~ubuntu16.04.1/build/src/nvim/auto -I/build/neovim-RVcgEA/neovim-0.1.5ubuntu1+git201701011530+3003+22~ubuntu16.04.1/build/include
Compiled by root@lgw01-55

Optional features included (+) or not (-): +acl   +iconv    +jemalloc +tui
For differences from Vim, see :help vim-differences

   system vimrc file: "$VIM/sysinit.vim"                         
  fall-back for $VIM: "/usr/share/nvim"

In Neovim, the command echo has('python') returns 1 and the command echo has('python3') also returns 1.

My init.vim ->

call plug#begin('~/.config/nvim/plugged')
Plug 'ensime/ensime-vim'
Plug 'derekwyatt/vim-scala' , {'for' : 'scala'}
call plug#end()

which I then called the following commands in Neovim:

:w
:source %
:PlugInstall
:UpdateRemotePlugins

The result of :UpdateRemotePlugins is:

:UpdateRemotePlugins
remote/host: python host registered plugins ['ensime.py']
remote/host: generated rplugin manifest: /home/konstantinos/.local/share/nvim/rplugin.vim

In my scala project, I'm using sbt version 0.13.7.
I put the line addSbtPlugin("org.ensime" % "sbt-ensime" % "1.12.5") in ~/.sbt/0.13/plugins/plugins.sbt

Afterwards, I compiled the project with sbt compile and generated the .ensime file with sbt ensimeConfig.

The command sbt ensimeConfig seemed to work, but there were a few failed downloads for the netlib-native package. However, that doesn't seem like a fatal problem.

Right after opening a scala file in my project with neovim, I get the following error:

Error detected while processing CursorMoved Auto commands for "*.scala":
error caught in request handler '/home/konstantinos/.config/nvim/plugged/ensime-vim/rplugin/python/ensime.py:autocmd:CursorMoved:*.scala ['src/main/scala/ca/crim/deti/re/evaluation/WikidataValidator.scala
']':
Traceback (most recent call last):
  File "/home/konstantinos/.config/nvim/plugged/ensime-vim/rplugin/python/ensime.py", line 181, in au_cursor_moved
    super(NeovimEnsime, self).au_cursor_moved(*args, **kwargs)
  File "/home/konstantinos/.config/nvim/plugged/ensime-vim/ensime_shared/ensime.py", line 21, in wrapper2
    create_client=create_client)
  File "/home/konstantinos/.config/nvim/plugged/ensime-vim/ensime_shared/ensime.py", line 93, in current_client
    create_client=create_client)
  File "/home/konstantinos/.config/nvim/plugged/ensime-vim/ensime_shared/ensime.py", line 103, in client_for
     client = self.create_client(config_path)
  File "/home/konstantinos/.config/nvim/plugged/ensime-vim/ensime_shared/ensime.py", line 115, in create_client

The rplugin manifest in ~/.local/share/nvim/rplugin.vim :

" python3 plugins

" ruby plugins

" python plugins
call remote#host#RegisterPlugin('python', '/home/konstantinos/.config/nvim/plugged/ensime-vim/rplugin/python/ensime.py', [
      \ {'sync': v:true, 'name': 'BufLeave', 'type': 'autocmd', 'opts': {'pattern': '*.scala', 'eval': 'expand("<afile>")'}},
      \ {'sync': v:true, 'name': 'CursorHold', 'type': 'autocmd', 'opts': {'pattern': '*.scala', 'eval': 'expand("<afile>")'}},
      \ {'sync': v:true, 'name': 'CursorMoved', 'type': 'autocmd', 'opts': {'pattern': '*.scala', 'eval': 'expand("<afile>")'}},
      \ {'sync': v:true, 'name': 'VimEnter', 'type': 'autocmd', 'opts': {'pattern': '*.scala', 'eval': 'expand("<afile>")'}},
      \ {'sync': v:true, 'name': 'VimLeave', 'type': 'autocmd', 'opts': {'pattern': '*.scala', 'eval': 'expand("<afile>")'}},
      \ {'sync': v:true, 'name': 'EnAddImport', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnClients', 'type': 'command', 'opts': {'nargs': '0', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugBacktrace', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugClearBreaks', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugContinue', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugNext', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugSetBreak', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugStart', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugStep', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDebugStepOut', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDeclaration', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDeclarationSplit', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDocBrowse', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnDocUri', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnInline', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnInspectType', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnInstall', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnOrganizeImports', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnShowPackage', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnRename', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnSuggestImport', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnSearch', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnSymbol', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnSymbolByName', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnToggleFullType', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnToggleTeardown', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnType', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnTypeCheck', 'type': 'command', 'opts': {'nargs': '*', 'range': ''}},
      \ {'sync': v:true, 'name': 'EnCompleteFunc', 'type': 'function', 'opts': {}},
      \ {'sync': v:true, 'name': 'EnPackageDecl', 'type': 'function', 'opts': {}},
     \ ])

[ches]

Hi, thanks for the detailed info, that's helpful. It appears that your setup is mostly working.

The Python backtrace you posted looks like it might be cut off, it gives me some direction on what's going wrong, but if there is more of it it would be great—after this happens, can you run :messages and see if there is longer output?

The only thing I can really see that might be wrong from the backtrace so far is that we expect to successfully read the :java-home value out of your project's .ensime file—could you please Gist the contents of your .ensime?

It might be possible that sbt-ensime doesn't write that config key into the .ensime file if it can't figure out what your JAVA_HOME should be, and we should somehow fail more gracefully in case it's missing.

[koslambrou]

Thanks for your answer!

After running :message, the only additionnal output is:

Error detected while processing CursorMoved Auto commands for "*.scala":
  launcher = EnsimeLauncher(self._vim, confi

Seems like there's more output as you said, but I don't know how to extract it.

Here's my ensime file.
I checked and the java-home points to the correct path in my system.

[ches]

Ah okay, seeing another possible problem stemming from a recent change in the plugin—there's a code path where we might be doing a filesystem read without protecting against the directory not existing.

Could you try mkdir -p ~/.config/ensime-vim and then run nvim again?

[koslambrou]

This fix works!
Thanks a lot!

[ches]

Yay, glad that's got you going!