patch 8.0.1293: setting a breakpoint in the terminal debugger sometimes fails commit https://github.com/vim/vim/commit/60e73f2acc890f07056fa1bea8dbe89d26918b3e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Nov 12 18:02:06 2017 +0100 patch 8.0.1293: setting a breakpoint in the terminal debugger sometimes fails Problem: Setting a breakpoint in the terminal debugger sometimes fails. Solution: Interrupt the program if needed. Set the interface to async.

" Test if fnameescape is correct for special chars like !
function! 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! " . fnameescape(fname)
    let status = v:true
  endtry
  call assert_true(status, "ExclamationMark")
  call delete(fname)
endfunction