patch 8.1.0555: crash when last search pat is set but not last substitute pat commit https://github.com/vim/vim/commit/2fb8f684d888ad68b283ba8f9505106b5fb725be Author: Bram Moolenaar <Bram@vim.org> Date: Sat Dec 1 13:14:45 2018 +0100 patch 8.1.0555: crash when last search pat is set but not last substitute pat Problem: Crash when last search pat is set but not last substitute pat. Solution: Do not mix up last search pattern and last subtitute pattern. (closes #3647)

" Test 'autochdir' behavior

if !exists("+autochdir")
  finish
endif

func Test_set_filename()
  let cwd = getcwd()
  call test_autochdir()
  set acd
  new
  w samples/Xtest
  call assert_equal("Xtest", expand('%'))
  call assert_equal("samples", substitute(getcwd(), '.*/\(\k*\)', '\1', ''))
  bwipe!
  set noacd
  exe 'cd ' . cwd
  call delete('samples/Xtest')
endfunc