bug#60626: 30.0.50; `buffer-live-p' sometimes returns t on killed buffers

[Ihor Radchenko]

Hi,

We are recently experiencing test failures using Emacs 28, Emacs 27, and
Emacs 26 on CI (non-interactively):

https://builds.sr.ht/~bzg/job/918602

2 unexpected results:
   FAILED  ob-octave/graphics-file  ((should-not (buffer-live-p (get-buffer 
"*Org-Babel Error Output*"))) :form (buffer-live-p #<killed buffer>) :value t)
   FAILED  ob-octave/graphics-file-space  ((should-not (buffer-live-p 
(get-buffer "*Org-Babel Error Output*"))) :form (buffer-live-p #<killed 
buffer>) :value t)

Note that (buffer-live-p #<killed buffer>) returns non-nil, which is
unexpected.

I am also able to reproduce locally using rake + podman:

See https://git.sr.ht/~bzg/org-mode-tests/:

1. cd /path/to/org-mode-tests
2. ln -s /path/to/org ./org-mode
3. cd local
4. rake test:debian:emacs28 

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>