I pushed the fix to master.

[1: fda58fbc24]: 2018-03-10 19:51:25 -0500
  Fix wrong behavior of 'outline-headers-as-kill' command (Bug#30209)
  https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=fda58fbc245a3f6f6722261ffb2e2262231bd4ea