From: "Stuart D. Herring" <herring@lanl.gov>
Subject: Re: Problem report #18
Date: Mon, 10 Apr 2006 13:04:16 -0700 (PDT) [thread overview]
Message-ID: <38449.128.165.123.132.1144699456.squirrel@webmail.lanl.gov> (raw)
In-Reply-To: <200604101859.k3AIx3In005649@scanner2.ics.uci.edu>
Another simplification (unfortunately -- not a solution): The majority of
this report is a red herring. The (possible) issue is quite simple:
before the while loop, save_wv==prev_wv==0. This code in the loop:
> 1847 if (prev_wv)
> 1848 prev_wv->next = wv;
> 1849 else
>
> Event var_deref_op: Variable "save_wv" tracked as NULL was dereferenced.
> Also see events: [assign_zero][alias_transfer]
>
> 1850 save_wv->contents = wv;
insists on dereferencing one of them. If this branch (the else of a
vector-element-is-which-type? conditional) gets taken first time through
the loop, SIGSEGV. But we're analyzing the vector menu_items here... if
we know that its structure precludes the first iteration of this loop
taking the last case (that is, if (aref menu_items start) is t, nil,
'lambda, or 'quote), then it's fine.
Hope it helps,
Davis
--
This product is sold by volume, not by mass. If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.
next prev parent reply other threads:[~2006-04-10 20:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-10 18:59 Problem report #18 Dan Nicolaescu
2006-04-10 20:04 ` Stuart D. Herring [this message]
2006-04-11 6:58 ` Problem report #18 PENDING Jan D.
2006-04-11 8:33 ` Sascha Wilde
2006-05-13 19:01 ` Dan Nicolaescu
2006-05-13 19:58 ` Jan D.
2006-05-13 20:21 ` Dan Nicolaescu
2006-05-14 11:20 ` Jan D.
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