patch 8.1.0494: functions do not check for a window ID in other tabs commit https://github.com/vim/vim/commit/babfcf54ae9bf9570eddf4958a553635cd589e21 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Oct 25 13:11:16 2018 +0200 patch 8.1.0494: functions do not check for a window ID in other tabs Problem: Functions do not check for a window ID in other tabs. Solution: Also find the window ID in other than the current tab.

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