bug#34974: 27.0.50; Moving article error with duplicate suppression disabled

[Eric Abrahamsen]

"Basil L. Contovounesios" <contovob@tcd.ie> writes:

> With gnus-suppress-duplicates left at its default value of nil, trying
> to move an article with 'B m <group>' gives me the following backtrace:
>
> Debugger entered--Lisp error: (wrong-type-argument hash-table-p nil)
>   remhash("<redacted-message-id>" nil)
>   gnus-dup-unsuppress-article(1988)
>   gnus-summary-move-article(nil)
>   funcall-interactively(gnus-summary-move-article nil)
>   call-interactively(gnus-summary-move-article nil nil)
>   command-execute(gnus-summary-move-article)
>
> I'm no expert, and I haven't tried reproducing this with a minimal
> config, but I think gnus-summary-move-article should not call
> gnus-dup-unsuppress-article when gnus-suppress-duplicates is nil, right?
>
> This issue seems to have been uncovered by the switch to hash-tables in
> bug#33653.  Previously, gnus-dup-unsuppress-article called unintern,
> which would not complain when its second argument gnus-dup-hashtb was
> nil, even though it probably should have.
>
> Patch to follow.

Thanks, Basil!

It looks like the only other call to `gnus-dup-unsuppress-articles' is
wrapped in a check for `gnus-suppress-duplicates' -- I suppose it would
be enough just to wrap this one as well?

Eric