It looks interesting. Personally, I'm not a user of bookmark.el, so I
have no clear view whether we need it in parallel to the tagging of bugs
in debbugs. See the commands `debbugs-gnu-toggle-tag' and
`debbugs-gnu-toggle-mark', which offer a kind of internal bookmarking.
I wasn't aware of that. I'll read a out those.
But I won't object if I understand the additional benefit.
Not clear to me at this point. Give me time to try what you recommended. I suspect that we'll just close the bug.
I read the Tabulated Lists node of the manual and learn what tag and mark means in the context of Debbugs. I tried both features.
One interest of bookmarks is that it uses a single interface whatever the handler and major mode is: You learn them once.
Another interest is that they're centralized. Thus when visiting the bookmark menu, where I have among others a bookmarks to "Emacs sources" handled by `vc-dir' and a bookmark to "Search results for "emacs" - explain xkcd" handled by EWW, I could also have a bookmark for "Emacs Bug #78864" handled by Debbugs.
But my feeling is that it's not worth introducing bookmarks in debbugs-gnu.el: It'd add confusion for little gain.
On my side I may find time to follow your suggestion and rework my patch in a separate file, so I can eventually continue using bookmarks to track bugs. If it happens, I'll share the result and see whether other people are interested (I doubt).
Feel free to close that bug.