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From: Richard Stallman <rms@gnu.org>
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Subject: Re: Bugs caused by recent use of define-derived-mode
Date: Tue, 03 Sep 2002 09:26:54 -0400
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One idea for how to fix the abbrev-table bugs is to modify
define-derived-mode to accept some optional keywords as arguments
before the body.  :same-abbrev-table could mean to use the parent's
abbrev table unmodified, and :same-syntax-table would do likewise for
the syntax table.

This change would be upward compatible for existing calls to
define-derived-mode that work correctly.