Cause crash when switch to terminal buffer in neovim

[yihuang]

Reproduce steps:

• $ nvim open neovim
• :term open terminal buffer
• :e test open normal buffer
• :BufExplorer show buffer list
• j<CR> switch back to terminal buffer
• The whole neovim quit.

Environment:

• iTerm2 on macosx
• NVIM v0.3.4
• bufexplorer git head

[jlanzarotta]

Sorry, I do not use neovim. Am not seeing this issue with regular vim...