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bug#44849: [PATCH] Make XEmacs compat variable warning-level-aliases obs

From: Stefan Kangas
Subject: bug#44849: [PATCH] Make XEmacs compat variable warning-level-aliases obsolete
Date: Tue, 24 Nov 2020 13:40:41 -0800 
"Basil L. Contovounesios" <contovob@tcd.ie> writes:

> Stefan Kangas <stefan@marxist.se> writes:
>
>> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
>>
>>> Why the cdr-safe?
>>
>> To avoid this:
>>
>> (and (assq level warning-level-aliases)
>>      (cdr (assq level warning-level-aliases)))
>
> But (cdr nil) is well-defined as being nil.

Oops.  Indeed.
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