patch 8.0.0265: may get ml_get error when :pydo deletes lines commit https://github.com/vim/vim/commit/a58883b4ea0bbb813fd4dd7eb49dd6f03e3e5387 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 29 21:31:09 2017 +0100 patch 8.0.0265: may get ml_get error when :pydo deletes lines Problem: May get ml_get error when :pydo deletes lines or switches to another buffer. (Nikolai Pavlov, issue https://github.com/vim/vim/issues/1421) Solution: Check the buffer and line every time.

" Common preparations for running tests.

" Make sure 'runtimepath' and 'packpath' does not include $HOME.
set rtp=$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after
if has('packages')
  let &packpath = &rtp
endif

" Only when the +eval feature is present. 
if 1
  " Make sure $HOME does not get read or written.
  let $HOME = '/does/not/exist'
endif