From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Walck, Scott" Newsgroups: gmane.lisp.guile.user Subject: RE: set-current-module in .guile ? Date: Wed, 9 Apr 2008 11:24:46 -0400 Message-ID: References: <18423.46537.161648.253613@entangle.lvc.edu> <47F7E878.20609@wilsonjc.us> <87iqyvrpwj.fsf@gnu.org> <87ve2unnia.fsf@gnu.org> <87fxtxrdhw.fsf@gnu.org> <18426.14519.36960.278300@entangle.lvc.edu>,<87lk3nhxw0.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1207754857 27428 80.91.229.12 (9 Apr 2008 15:27:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 9 Apr 2008 15:27:37 +0000 (UTC) To: "guile-user@gnu.org" Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Wed Apr 09 17:28:11 2008 Return-path: Envelope-to: guile-user@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1JjcDE-0004AA-Hm for guile-user@m.gmane.org; Wed, 09 Apr 2008 17:27:48 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JjcCa-0003pA-MB for guile-user@m.gmane.org; Wed, 09 Apr 2008 11:27:08 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1JjcAk-0001u1-6q for guile-user@gnu.org; Wed, 09 Apr 2008 11:25:14 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1JjcAi-0001sJ-C1 for guile-user@gnu.org; Wed, 09 Apr 2008 11:25:13 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JjcAi-0001s3-0f for guile-user@gnu.org; Wed, 09 Apr 2008 11:25:12 -0400 Original-Received: from lvc02.lvc.edu ([192.77.143.72] helo=exchange.lvc.edu) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_ARCFOUR_MD5:16) (Exim 4.60) (envelope-from ) id 1JjcAh-0004jv-PR for guile-user@gnu.org; Wed, 09 Apr 2008 11:25:11 -0400 Original-Received: from lvc02.lvc.edu ([10.1.1.71]) by lvc02.lvc.edu ([10.1.1.71]) with mapi; Wed, 9 Apr 2008 11:25:54 -0400 Thread-Topic: set-current-module in .guile ? Thread-Index: AciaU1YIrcw1o9nNT8uR9Hk5AJm7eQAAoG/t In-Reply-To: <87lk3nhxw0.fsf@gnu.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US X-detected-kernel: by monty-python.gnu.org: Windows 2000 SP4, XP SP1+ X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-user-bounces+guile-user=m.gmane.org@gnu.org Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.user:6530 Archived-At: Thanks, Loduvic. I appreciate your effort looking at this. Scott ________________________________________ From: guile-user-bounces+walck=3Dlvc.edu@gnu.org [guile-user-bounces+walck= =3Dlvc.edu@gnu.org] On Behalf Of Ludovic Court=E8s [ludo@gnu.org] Sent: Wednesday, April 09, 2008 11:05 AM To: guile-user@gnu.org Subject: Re: set-current-module in .guile ? Hi, I can reproduce the problem now, with Guile 1.8 and SLIB 3a5. "Scott N. Walck" writes: > [walck@entangle:~]$ guile > guile> (load "/usr/local/src/guile-scmutils/src/load.scm") > guile> (module-use! (current-module) generic-environment) > #f > guile> + > # > guile> (+ (vector 5 6) (vector 7 8)) > Segmentation fault (core dumped) That's because there's a circular reference in the modules: guile> (module-uses generic-environment) (#) guile> (current-module) # IOW, `generic-environment' uses `(guile-user)' (the default module that's used when one get to the REPL), and the `module-use!' line above makes `(guile-user)' use `generic-environment'. Thus, further variable lookups that are not satisfied by either module are bound to fail: the `module_variable ()' function in `modules.c' looks for the variable in `(guile-user)', then in `generic-environment', then in `(guile-user)', and so on. This should be reported as a `guile-scmutils' bug. One possibility is to fix the way `generic-environment' is created in `kernel/genenv.scm'. Guile-scmutils should really use modules in a more orthodox way rather than expect users to fiddle with `set-current-module', `module-use!', etc. Thanks, Ludovic.