bug#49866: 28.0.50; gnus-summary-exit from the transient search buffer giving error

[Lars Ingebrigtsen]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> Andy points out that the code above should not, by default, raise an
> error if the `alist-get' call returns nil. Something in both Pankaj and
> my installation has messed with the map functions so that this returns
> an error:
>
> (map-merge 'list '(1 2 3) nil)
>
> I couldn't raise an error with "emacs -Q", instead it returned:
>
> ((1 . 2) (3))
>
> which also seems wrong, but at least isn't an error.

Oh!

I assumed that map-merge didn't work on nil arguments, too, but didn't
actually check.  And indeed:

(map-merge 'list nil nil)
=> nil

So...  do you have an older version of map.el from ELPA/MELPA or
something?

-- 
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   bloggy blog: http://lars.ingebrigtsen.no