On Tue, May 6, 2008 at 6:19 AM, Jason Nielsen <jdn@math.carleton.ca> wrote:

I can confirm that compilation fails using SBCL 1.0.16 on a Ubuntu 7.10 system with a:

"has no suitable method for STREAM-ELEMENT-TYPE, and so has fallen through to this method...."

error that crashes the whole session. You can reproduce this behaviour with the following:

(defclass foo (standard-class) ())
(defclass bar () () (:metaclass foo))

Thanks for the confirmation. Actually I hoped this would not occur in the latest version, as Nikodemus Siivola said on 2008-01-15, in reply to what seems a very similar issue reported by Pascal Costanza: "This seems to have been fixed at some point during the last 10 months": <http://article.gmane.org/gmane.lisp.steel-bank.devel/10603>

Custom metaclasses are crucial for CLPython. Hopefully someone feels inclined to fix this SBCL issue.

- Willem