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bug#4887: 23.1; list-load-path-shadows produces broken buffer

From: Stefan Monnier
Subject: bug#4887: 23.1; list-load-path-shadows produces broken buffer
Date: Wed, 11 Nov 2009 15:40:48 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

>     Should linum use a different implementation method than
> define-globalized-minor-mode?  (does one exist?)

You mean global-linum-mode?  Yes, it could use a different method,
e.g. setting global hooks instead, but that might prove tricky.

>     Should we instead fix define-globalized-minor-mode to work with all
> buffers?  Its documentation via ^h f claims it works in every buffer:

That would be the best solution, yes.

Given the hooks we currently have, it's not very easy because buffers
like *Shadows* get created without running any hook, so basically the
first hook that would get triggered might be something like
window-configuration-change-hook, but that hooks has no easy way to
decide whether that buffer was just created recently or on the contrary
has been around for a long while (in which case enabling linum-mode
might be very wrong since the user may have turned it off there

An easier solution is to not change anything to
define-globalized-minor-mode and to require Elisp code to explicitly set
a major mode for any buffer that will be displayed.  E.g. for *Shadows*
the Elisp code should explicitly call fundamental-mode in it.


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