patch 8.0.1160: getting tab-local variable fails after closing window commit https://github.com/vim/vim/commit/816968defc8ae79eb7e2319e991e74661be8d750 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Sep 29 21:29:18 2017 +0200 patch 8.0.1160: getting tab-local variable fails after closing window Problem: Getting tab-local variable fails after closing window. Solution: set tp_firstwin and tp_lastwin. (Jason Franklin, closes https://github.com/vim/vim/issues/2170)

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