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bug#5863: defadvice in byte compiled file does not work

From: Lennart Borgman
Subject: bug#5863: defadvice in byte compiled file does not work
Date: Thu, 8 Apr 2010 17:26:26 +0200

I have this in mumamo.el:

  (defvar mumamo-stop-widen nil)
  (defadvice widen (around
    (unless (and mumamo-multi-major-mode

I let bind mumamo-stop-widen to avoid widening for certain situations.
This works sometimes and not other times. It looks like the defadvice
is simply skipped the other times (but I am not sure).

It looks like it depends on byte compilation in some way. Or actually
several ways. I have seen instances where it helps to eval the
defadvice and other cases where it does not. If the function calling
(widen) is byte compiled it does not work, but it works if the
function is evaled. However it looks like both these conditions must
be meat.

Beeing able to do something like this is very essential to get multi
major modes working reliably. Is there any remedy for this problem?

If not, could we please add a way to control if (widen) widens the
buffer (or how it does it, but that seems to complicated to me)?

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