bug#20845: [External] : Re: bug#20845: 25.0.50; bookmark.el, handling of fictitious `buffer' property

[Drew Adams]

> I've now done thing in Emacs 29.

Can you please say what "thing" you've done?

I guess you've documented this bookmark
property/field (?).

But have you also documented that this is an
_exceptional_ bookmark property, in that (1)
it can be added ephemerally on the fly by a
bookmark jump function, to pass along a buffer
object, but (2) it can't be persisted as part
of a saved bookmark.

1. It's important that the intended use of
this field be doc'd.

2. It's important that users understand that
they can't create a bookmark with a buffer
(as opposed to a buffer name) as the value of
such a property, and then save that bookmark.

#1 guides you wrt something you can do.
#2 advises you not to do something that will
break your bookmark file.