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bug#35443: 27.0.50; Gnus (nnimap) shows "ghost" messages in summary buff

From: Eric Abrahamsen
Subject: bug#35443: 27.0.50; Gnus (nnimap) shows "ghost" messages in summary buffer
Date: Fri, 12 Jul 2019 09:58:49 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Eric Abrahamsen <address@hidden> writes:

> Lars Ingebrigtsen <address@hidden> writes:
>> Eric Abrahamsen <address@hidden> writes:
>>> Which is obviously insufficient. I've since changed it to:
>>> "\\([A-Z][[:ascii:]-]+: \\)"
>>> Which works better, but also seems susceptible to breakage due to
>>> ignorance. A quick scan doesn't turn up any `mail-header-regexp'
>>> variables or `this-is-a-mail-header-p' functions -- does the above
>>> regexp seem reasonable?
>> Headers are case insensitive...  but not all characters in the [:ascii:]
>> set are allowed; far from it.  [:alnum:] is closer, but with - and...
>> er...  stuff...  One of the RFCs probably has the definition.  :-)
> Oh, good point. RFC2822 says chars 33 to 126, inclusive, minus the
> colon. So I guess it's "[!-9,;-~]+: ", unlikely as some of those
> characters seem.
> Now I'm working with the attached diff.

Sorry, this one...

Attachment: imap-header-transform-fix.diff
Description: Text Data

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