patch 8.0.1505: debugger can't break on a condition commit https://github.com/vim/vim/commit/c6f9f739d32084923c3031cbf6f581f8c8bf7fd2 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 11 19:06:26 2018 +0100 patch 8.0.1505: debugger can't break on a condition Problem: Debugger can't break on a condition. (Charles Campbell) Solution: Add ":breakadd expr". (Christian Brabandt, closes https://github.com/vim/vim/issues/859)

function Test_Comparators()
  try
    let oldisident=&isident
    set isident+=#
    call assert_equal(1, 1 is#1)
  finally
    let &isident=oldisident
  endtry
endfunction