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Re: font-lock and shell scripts: Raises redisplay errors in highlight pa

From: T. V. Raman
Subject: Re: font-lock and shell scripts: Raises redisplay errors in highlight pattern:
Date: Fri, 14 Jul 2006 06:00:50 -0700

Unhandled errors do make a beep which is correct.

But that is not sufficient for the  user who is not looking at
the display --- I need to say "why" it beeped.

Also, very often I dont sit at my PC -- I sit somewhere outside
with a wireless keyboard and speakers, and sadly the PC speaker
beep only beeps at the PC -- not over the sound card.

The latter is a bit esoteric I admit -- but for something like
the vm mail reader signalling end of folder I really need more
feedback than a beep.

>>>>> "Richard" == Richard Stallman <address@hidden> writes:
    Richard>     1) Might be marginally benefitial even for the
    Richard> mainstream emacs user to not have these errors
    Richard> raised and handled -- --- what variables in my
    Richard> sh-mode/font-lock environment should I look at to
    Richard> chase down and fix the cause of the error in the
    Richard> first place? (Note that I'm running with font-lock
    Richard> turned on at the highest level).
    Richard> If there is no good reason for this to signal an
    Richard> error, it would be cleaner to eliminate it.  But
    Richard> first one has to track down what causes the error.
    Richard> One way to do that is using GDB with a breakpoint at
    Richard> Fsignal.  Setting debug-on-signal might enable you
    Richard> to find the cause using the Lisp debugger.
    Richard>     When (error ...) is called:
    Richard>     Before-Advice:
    Richard>     A) Check if there is a handler waiting to catch
    Richard> the error.  B) If yes, do nothing; C) Else give the
    Richard> user auditory feedback.
    Richard> Unhandled errors do make a beep, which is auditory
    Richard> feedback.  So what is the change that you propose?

Best Regards,

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