bug#6106: 24.0.50; info.el adds 'search-failed to debug-ignored-errors

[Eli Zaretskii]

> From: npostavs@users.sourceforge.net
> Date: Sat, 01 Apr 2017 09:43:59 -0400
> Cc: Mark Oteiza <mvoteiza@udel.edu>, 6106@debbugs.gnu.org,
>       Helmut Eller <eller.helmut@gmail.com>
> 
> Turns out this breaks isearch over multiple nodes, as noted by Mark
> Oteiza in [1].  I believe this is fixed by the patch below.
> 
> [1]: http://lists.gnu.org/archive/html/emacs-devel/2017-03/msg00869.html

Thanks.  I think the symbol you are introducing and its plist should
be documented in the ELisp manual and mentioned in NEWS.