> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sun, 20 Dec 2015 18:27:19 +0000
> Cc: eggert@cs.ucla.edu, dancol@dancol.org, tzz@lifelogs.com,
>       aurelien.aptel+emacs@gmail.com, emacs-devel@gnu.org
>
>     and did you make sure
>     that signaling an error from a module still reports the same
>     information and backtrace as before the change?
>
> No, but I wouldn't know how the patch should change this. It only changes an
> implementation detail in the error reporting code of the module implementation
> itself.

I provided one such test here:

  http://lists.gnu.org/archive/html/emacs-devel/2015-11/msg02318.html

and the resulting backtrace here:

  http://lists.gnu.org/archive/html/emacs-devel/2015-11/msg02405.html

> If we wanted to check the backtrace, I think we should rather add a unit test
> for it.

That would be good, thanks.