patch 8.0.0212: buffer for key name may be too small commit https://github.com/vim/vim/commit/423977d3cebac2be1158b1d11da60fe96db4b750 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 22 15:05:12 2017 +0100 patch 8.0.0212: buffer for key name may be too small Problem: The buffer used to store a key name theoreticaly could be too small. (Coverity) Solution: Count all possible modifier characters. Add a check for the length just in case.

" Tests for :undo

func Test_ex_undo()
  new ex-undo
  setlocal ul=10
  exe "normal ione\n\<Esc>"
  setlocal ul=10
  exe "normal itwo\n\<Esc>"
  setlocal ul=10
  exe "normal ithree\n\<Esc>"
  call assert_equal(4, line('$'))
  undo
  call assert_equal(3, line('$'))
  undo 1
  call assert_equal(2, line('$'))
  undo 0
  call assert_equal(1, line('$'))
  quit!
endfunc