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From: Richard Stallman <rms@gnu.org>
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Subject: Re: Did window scroll notification change?
Date: Mon, 04 Nov 2002 13:05:58 -0500
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    >     `window-scroll-functions' is being called ad infinitum.  Emacs
    > is partially locked, but enough C-g gets me to a point where I can
    > delete the Eshell buffer.

window-scroll-functions is run from C code.  You could put a
breakpoint at the places that call it, and that way you could debug
why it gets called.  You could see if it is getting called recursively
or in a loop, etc.