bug#59328: 29.0.50; `seq-keep' implementation only valid for lists

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: 59328@debbugs.gnu.org,  larsi@gnus.org,  jonas@bernoul.li
> Date: Thu, 24 Nov 2022 16:09:32 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > OK, then just install this, though now I wonder why we need this change...
> 
> Without that change `seq-keep' would error for sequence types like
> streams.  Try for example
> 
> #+begin_src emacs-lisp
> (require 'stream)
> (seq-keep
>  (lambda (x) (and (<= 0 x) x))
>  (stream (list -1 2 -3 4)))
> #+end_src

Didn't you just say that 'stream' is not in Emacs?  If I try the above, the
debugger kicks in right on the 'require' line.