patch 8.2.0829: filter() may give misleading error message Commit: https://github.com/vim/vim/commit/fcb0b61d15f66f0e9116a6bc56d9d8105bb913cf Author: Bram Moolenaar <Bram@vim.org> Date: Tue May 26 20:22:01 2020 +0200 patch 8.2.0829: filter() may give misleading error message Problem: filter() may give misleading error message. Solution: Also mention Blob as an allowed argument.

" Test :version Ex command

func Test_version()
  " version should always return the same string.
  let v1 = execute('version')
  let v2 = execute('version')
  call assert_equal(v1, v2)

  call assert_match("^\n\nVIM - Vi IMproved .*", v1)
endfunc