`/` breaks `nvim` 
Ubuntu 16.04

NVIM v0.2.3-dev

SpaceVim 0.7.0-dev

Every time I press `/` in `nvim`, it quits leaving the following message:
```
nvim: /build/neovim-nkVHdO/neovim-0.2.2ubuntu2+git201803082017-9cefd83-f2f288d/src/nvim/api/private/helpers.c:89: try_leave: Assertion `current_exception == NULL' failed.
```

