patch 8.0.0702: an error in a timer can make Vim unusable commit https://github.com/vim/vim/commit/c577d813b7978345dec4310b2d8f5d5624a681f6 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 8 22:37:34 2017 +0200 patch 8.0.0702: an error in a timer can make Vim unusable Problem: An error in a timer can make Vim unusable. Solution: Don't set the error flag or exception from a timer. Stop a timer if it causes an error 3 out of 3 times. Discard an exception caused inside a timer.

" Test :recover

func Test_recover_root_dir()
  " This used to access invalid memory.
  split Xtest
  set dir=/
  call assert_fails('recover', 'E305:')
  close!

  if has('win32') || filewritable('/') == 2
    " can write in / directory on MS-Windows
    set dir=/notexist/
  endif
  call assert_fails('split Xtest', 'E303:')
  set dir&
endfunc

" TODO: move recover tests from test78.in to here.