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

From: "Basil L. Contovounesios" <[email-masked]>
Date: Fri, 06 Aug 2021 12:25:17 +0100

Lars Ingebrigtsen <[email-masked]> writes:

> "Basil L. Contovounesios" <[email-masked]> writes:
>
>> The problem isn't nil, it's '(1 2 3). 
>
> The original backtrace was
>
> Debugger entered--Lisp error: (cl-no-applicable-method map-into nil list)
>   signal(cl-no-applicable-method (map-into nil list))
> [...]
>   map-into(nil list)
>   map-merge(list nil nil)

This reminds me of https://bugs.gnu.org/46722, although I can't
reproduce the error with (map-into () 'list).

> though.  So Eric's patch is the right thing for the '(1 2 3) nil case?

I don't see how Eric's patch addresses the '(1 2 3) case, since '(1 2 3)
is not a valid map that map-merge can usefully operate on.

> But the map-merge mystery still remains.

:(

-- 
Basil