jedi-vim: Vim freezes on first line comment

Issue

Vim freezes when typing a comment on the first line of the file. Here “freezes” means that it becomes impossible to exit insert mode nor can anything be inserted. This only happens when entering a comment on the first line of the edited Python file. This isn’t about ctrl-s 😃

Steps to reproduce

To perform the tests I created a clean environment as follows:

1. vagrant init bento/ubuntu-16.04
2. vagrant up
3. vagrant ssh
4. sudo apt install git vim-nox curl
5. download vim-plug: curl -fLo ~/.vim/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
6. setup vim-plug (.vimrc contents below)
7. run :PlugInstall in vim to install jedi-vim
8. quit vim before running the tests

Contents of .vimrc

    call plug#begin('~/.vim/plugged')

    Plug 'davidhalter/jedi-vim'

    call plug#end()

The following tests were performed and all of them begin by opening the empty test file test.py and entering insert mode:

1. type “#dead<enter><esc>” => Vim is frozen and in insert mode, cursor on second line
2. type “#dead<enter><esc>” really fast => Vim exits insert mode and is not frozen
3. type “carl<enter>#david<enter><esc>” => Vim exits insert mode and is not frozen
4. type “#<esc>” => Vim exits insert mode and is not frozen
5. type “#<enter>” => Vim is in insert mode and is frozen
6. type “#carl<esc>a david<esc>” => Vim is in insert mode and is frozen

Versions

• jedi-vim: 682f37792d830bb3211df40e049e992db26e4ec0
• Vim: 7.4 (2013 Aug 10, compiled Nov 24 2016 16:44:48)
• Python: 3.5.2
• Vim-plug: e3252aae2c9fa6d5ab9bbd3dfe149f35573f4773

Output of the “JediDebugInfo” command (in a Python buffer)

Jedi-vim debug information

Using Python version: 3

• sys.version: 3.5.2 (default, Nov 17 2016, 17:05:23), [GCC 5.4.0 20160609]
• site module: /usr/lib/python3.5/site.py Jedi path: /home/vagrant/.vim/plugged/jedi-vim/jedi/jedi/init.py
• version: 0.10.0
• sys_path:
  • /home/vagrant/.vim/plugged/jedi-vim
  • /usr/lib/python35.zip
  • /usr/lib/python3.5
  • /usr/lib/python3.5/plat-x86_64-linux-gnu
  • /usr/lib/python3.5/lib-dynload
  • /usr/local/lib/python3.5/dist-packages
  • /usr/lib/python3/dist-packages
  • vim_path jedi-vim git version: 682f377 jedi git submodule status: 70200861661a921016563717487c1ced9993acdb jedi (v0.10.0)

Settings

  omnifunc=
  completeopt=menuone,longest,preview
        Last set from ~/.vim/plugged/jedi-vim/plugin/jedi.vim

Output of the “messages” Vim command

No output other than “Messages maintainer: Bram Moolenaar Bram@vim.org”.

Output of “scriptnames” Vim command

  1: /usr/share/vim/vimrc
  2: /usr/share/vim/vim74/debian.vim
  3: /usr/share/vim/vim74/syntax/syntax.vim
  4: /usr/share/vim/vim74/syntax/synload.vim
  5: /usr/share/vim/vim74/syntax/syncolor.vim
  6: /usr/share/vim/vim74/filetype.vim
  7: ~/.vimrc
  8: ~/.vim/autoload/plug.vim
  9: /usr/share/vim/vim74/ftoff.vim
 10: /usr/share/vim/vim74/ftplugin.vim
 11: /usr/share/vim/vim74/indent.vim
 12: ~/.vim/plugged/jedi-vim/plugin/jedi.vim
 13: /usr/share/vim/vim74/plugin/getscriptPlugin.vim
 14: /usr/share/vim/vim74/plugin/gzip.vim
 15: /usr/share/vim/vim74/plugin/logiPat.vim
 16: /usr/share/vim/vim74/plugin/matchparen.vim
 17: /usr/share/vim/vim74/plugin/netrwPlugin.vim
 18: /usr/share/vim/vim74/plugin/rrhelper.vim
 19: /usr/share/vim/vim74/plugin/spellfile.vim
 20: /usr/share/vim/vim74/plugin/tarPlugin.vim
 21: /usr/share/vim/vim74/plugin/tohtml.vim
 22: /usr/share/vim/vim74/plugin/vimballPlugin.vim
 23: /usr/share/vim/vim74/plugin/zipPlugin.vim
 24: ~/.vim/plugged/jedi-vim/autoload/jedi.vim