commit https://github.com/vim/vim/commit/437905c25d4cedfa16d0f87392e4a000d22362b7 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 26 19:01:05 2016 +0200 patch 7.4.1789 Problem: Cannot use ch_read() in the close callback. Solution: Do not discard the channel if there is readahead. Do not discard readahead if there is a close callback.

" Tests for tagjump (tags and special searches)

" SEGV occurs in older versions.  (At least 7.4.1748 or older)
func Test_ptag_with_notagstack()
  set notagstack
  call assert_fails('ptag does_not_exist_tag_name', 'E426')
  set tagstack&vim
endfunc
" vim: sw=2 et