bug#51887: 28.0.60; Gnus use imap.163.com will hang emacs and ran out of memory

[Feng Shu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Feng Shu" <tumashu@163.com> writes:
>
>> I only have <10000 mails, just email's UID are very large numbers.
>
> Yup.  The issue is that Gnus will sometimes convert these ranges into
> lists, and when the UIDs are very large, that blows up.  The real fix
> here is to change Gnus to never do that, but always work on ranges.
> It's a rather daunting task, though, since so many of Gnus' innards work
> on lists of article numbers, not ranges.

Maybe we can let user choice a max number when faced this situation instead of 
hang emacs.

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