patch 8.2.0120: virtcol() does not check arguments to be valid Commit: https://github.com/vim/vim/commit/b3d33d8570bc49a7f90990572d7f9630a1bfae02 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jan 15 20:36:55 2020 +0100 patch 8.2.0120: virtcol() does not check arguments to be valid Problem: virtcol() does not check arguments to be valid, which may lead to a crash. Solution: Check the column to be valid. Do not decrement MAXCOL. (closes #5480)

" Test if fnameescape is correct for special chars like !
func Test_fnameescape()
  let fname = 'Xspa ce'
  let status = v:false
  try
    exe "w! " . fnameescape(fname)
    let status = v:true
  endtry
  call assert_true(status, "Space")
  call delete(fname)

  let fname = 'Xemark!'
  let status = v:false
  try
    exe "w! " . fname->fnameescape()
    let status = v:true
  endtry
  call assert_true(status, "ExclamationMark")
  call delete(fname)
endfunc