bug#70994: [PATCH] Make cache regeneration work in group names with /

[Eric Abrahamsen <eric@ericabrahamsen.net>]

Stefan Kangas <stefankangas@gmail.com> writes:

> James Thomas via "Bug reports for GNU Emacs, the Swiss army knife of
> text editors" <bug-gnu-emacs@gnu.org> writes:
>
>> Reproduction steps for bug:
>>
>> - emacs -Q
>> - (setq gnus-secondary-select-methods
>>     '((nnatom "github.com/vedang/pdf-tools/commits.atom")))
>>   (setq gnus-select-method '(nnnil ""))
>> - M-x gnus
>> - Open a message in the new group and press *
>> - Add the cache virtual server (info "(gnus) Creating a Virtual Server")
>> - ^ (server buffer) and: g on the cache
>> - RET to open (fails)
>>
>> This is a possible fix that I've tested only on my (limited) setup, for
>> now:
>
> Eric, what do you think of the below patch?

Thanks for the bump...

James, wasn't this what bug#69517 was supposed to be fixing? I'm still
feeling like we're patching pinhole leaks in a fundamentally broken
system.

For the cache active file, wouldn't it be easier just to wrap the group
name in double quotes?