From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: "Drew Adams" <drew.adams@oracle.com>
Cc: 12677-done@debbugs.gnu.org
Subject: bug#12677: 24.2.50; `nreverse' complains that ("foo") is not `listp'
Date: Fri, 19 Oct 2012 10:19:47 -0400 [thread overview]
Message-ID: <jwvy5j2h7fr.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <7D8BA66E4D4345B7B791FCBC591A8AF3@us.oracle.com> (Drew Adams's message of "Thu, 18 Oct 2012 18:47:23 -0700")
>> My guess is that the code ended up doing something morally equivalent
>> to (nreverse '(1 2 . 3)). Try it and you'll see a similarly confusing
>> error message.
> I understand your guess, but I think that might not be what was
> happening. In the debugger I evaluated the variable and saw that its
> full value was just that singleton list.
Of course that's what you'd see because that's indeed the value *at that
point*, even though it had a different value before nreverse started
modifying the list. By the time you get the error, the problem data
is gone.
Stefan
next prev parent reply other threads:[~2012-10-19 14:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 19:25 bug#12677: 24.2.50; `nreverse' complains that ("foo") is not `listp' Drew Adams
2012-10-19 0:55 ` Stefan Monnier
2012-10-19 1:47 ` Drew Adams
2012-10-19 14:19 ` Stefan Monnier [this message]
2012-10-19 14:24 ` Drew Adams
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