bug#13752: Suggestions regarding the minibuffer

[Juri Linkov]

>>> only seems to inhibit messages from `message', not from `signal'?  I'm
>>> having some difficulty tracing the logic here...  Anybody know whether
>>> this is by design?
>>
>> This looks like a new feature request :-)  If this can't be implemented
>> using the existing signal-hook-function or signaling-function,
>> maybe then a new set-signal-function could be added?
>
> Sure -- but I was just expecting `set-message-function' to work here,
> though.

But does `signal' use one of too low-level messaging functions?
I can't find what function displays the error message in the echo area.