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

From: Basil L. Contovounesios
Subject: bug#34974: 27.0.50; Moving article error with duplicate suppression disabled
Date: Sun, 24 Mar 2019 17:08:16 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Eric Abrahamsen <address@hidden> writes:

> "Basil L. Contovounesios" <address@hidden> 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.
> 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?

That is what the proposed patch[1] does.  Is it okay to push this to

[1]: https://debbugs.gnu.org/34973#8

As I mention there, though, I'm not sure such a guard is sufficient in
the case that gnus-suppress-duplicates is enabled at a later stage, but
I will investigate and report this as a separate bug if needed.



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