bug#24047: Should 'signal' sometimes return?

[Paul Eggert]

On 07/23/2016 08:37 PM, Stefan Monnier wrote:
> Haven't looked in detail, but it looks OK.

Thanks, I installed it in 'master' and am marking this as done.

> A further patch could change the new `quit' function so it checks
> debug-on-quit, and either calls the debugger or calls Fsignal.  This way
> we don't need the intermediate signal_or_quit function.

I tried something along those lines (see attached), but wasn't convinced 
that the result was correct (there are a lot of flags flying around), 
and my patch would cause quits to traverse the handler list twice, which 
seems inelegant.

attempt.diff
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