Re: non-local exits in redisplay

[Akira Kyle]

> In `src/xdisp.c` there's things like `safe_call` (as well as
> `safe_call1` and `safe_call2`) for that.
>
> IIRC it uses the underlying condition-case machinery.

That's exactly what I was looking for, thanks!

Now the natural follow up question: Is it ok to use the error 
functions which end up calling xsignal in redisplay when one is 
sure it won't cause this sort of infinite loop? In my testing it 
looks like the error message ends up displaying ok, but are there 
any other gotchas I should look out for here?

Akira