bug#34525: replace-regexp missing some matches

[Eli Zaretskii]

> Date: Wed, 20 Feb 2019 21:30:03 +0000
> Cc: daniel.lopez999@gmail.com, 34525@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > Maybe look at this from a different angle: what do we have in C++ mode
> > that isn't present in C mode, and could potentially affect this use
> > case?
> 
> Well, the most obvious thing is the category text property whose value
> is the symbol c-<-as-paren-syntax.  This symbol's plist is
> 
>     (risky-local-variable t syntax-table (4 . 62))
> 
> .  I can't think of anything else at the moment.

If you remove that, does the problem go away?