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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Fix to long-standing crashes in GC
Date: Thu, 20 May 2004 09:17:57 -0400
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    But that's already checked:
    mark_memory calls makr_maybe_object and makr_maybe_pointer, but of which
    check for every object whether it's currently live (which really means
    "allocated" in the sense that it hasn't been reclaimed by the GC yet).
    That's what live_consp_, live_stringp_p, ... are for.

I had not noticed the function mark_maybe_object when I wrote
my previous message.  Now I am as puzzled as you are by this
failure.