patch 8.0.1803: warning for uninitialized variable commit https://github.com/vim/vim/commit/9b50f36e405309be97e28b5e19d81ff0902c5224 Author: Bram Moolenaar <Bram@vim.org> Date: Mon May 7 20:10:17 2018 +0200 patch 8.0.1803: warning for uninitialized variable Problem: Warning for uninitialized variable. (Tony Mechelynck) Solution: Initialize it.

" Test feedkeys() function.

func Test_feedkeys_x_with_empty_string()
  new
  call feedkeys("ifoo\<Esc>")
  call assert_equal('', getline('.'))
  call feedkeys('', 'x')
  call assert_equal('foo', getline('.'))

  " check it goes back to normal mode immediately.
  call feedkeys('i', 'x')
  call assert_equal('foo', getline('.'))
  quit!
endfunc