* testing/lisp/test-ob-octave.el (ob-octave/graphics-file):
(ob-octave/graphics-file-session):
(ob-octave/graphics-file-space): Wrap GET-BUFFER in BUFFER-LIVE-P.
This ensures that a killed buffer does not cause an incorrect failure
of a test.
Link: https://orgmode.org/list/87bknh5nva.fsf@localhost