patch 8.1.0692: if a buffer was deleted a channel can't write to it commit https://github.com/vim/vim/commit/8b62d87e4243d3dc9bf4f17bfe1a8953077a70c9 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 5 00:02:57 2019 +0100 patch 8.1.0692: if a buffer was deleted a channel can't write to it Problem: If a buffer was deleted a channel can't write to it. Solution: When the buffer exists but was unloaded, prepare it for writing. (closes #3764)

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