Bug#1125451: libmail-box-perl: $message->study("subject") broken

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Hi from the Low Hanging Fruit Perl session,

Sean Whitton, on 2026-01-16:
> David Bremner [16/Jan  8:14am +09] wrote:
>> Sean Whitton <[email protected]> writes:
>>> Hmm, I don't get any warnings here on trixie.
>>>
>>> So I would guess that this is a bug in libmail-box-perl 3.012.
>>
>> I got as far as confirming that $message->subject() returns something
>> reasonable, but $message->study("subject") returns undef. That seems
>> like a bug if I understand the docs correctly.
>=20
> Thanks.  Perl maintainers, this bug has a reproducer for a regression in
> libmail-box-perl in forky as compared to trixie.

I'm working on pulling the version 4 of the libmail* ecosystem
to unstable.  From what I can see for now, the reproducer is
still raising described issues though.

For information,
--=20
  .''`.  =C3=89tienne Mollier <[email protected]>
 : :' :  pgp: 8f91 b227 c7d6 f2b1 948c  8236 793c f67e 8f0d 11da
 `. `'   sent from /dev/pts/4, please excuse my verbosity
   `-

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