Subject: bug#34852: 26.1; seq-intersection ignores nil as element

From: Stefan Monnier <[email-masked]>
Date: Thu, 14 Mar 2019 19:14:23 -0400

> (seq-contains nil '(nil t foo) (lambda (x) t))  ->  nil
> It returns *nil* if testfn fails, or *nil* (ELT) if it succeds.

Just because it sometimes does doesn't mean it always does:

    (seq-contains '(0 3 4) 1 #'<)
    
returns 3

        Stefan