RE: [Emacs-diffs] trunk r115434: * subr.el (read-passwd): Disable show-paren-mode.

[Drew Adams]

> > Should we disable show-paren-mode's highlighting when the paren is
> > covered by a `display' property?
> 
> It's not just show-paren-mode.  It's any mode that looks at buffer
> text disregarding the display properties.
> 
> For that reason, I think read-passwd should use a completely different
> implementation, because otherwise it will reveal the secrets with the
> next random Emacs feature.

Just what I was thinking (but in my case only in vague terms).