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From: Dave Love <d.love@dl.ac.uk>
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Subject: Lisp manual text on buffer-local values
Date: Fri, 30 May 2003 14:31:21 +0100
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Node `Intro to Buffer-Local' contains this text with an example
following.  I _think_ it's obsolete in Emacs 21 following changes to
the binding mechanism.  At least the example now behaves differently.

   *Warning:* When a variable has buffer-local values in one or more
buffers, you can get Emacs very confused by binding the variable with
`let', changing to a different current buffer in which a different
binding is in effect, and then exiting the `let'.  This can scramble
the values of the buffer-local and default bindings.