From owner-freebsd-tcltk@freebsd.org Thu Mar 14 09:35:58 2019 Return-Path: Delivered-To: freebsd-tcltk@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9FEE2153A37E for ; Thu, 14 Mar 2019 09:35:58 +0000 (UTC) (envelope-from gahr@FreeBSD.org) Received: from mail.ptrcrt.ch (ptrcrt.ch [IPv6:2a02:2770:8:0:21a:4aff:fe7e:c6be]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D95B56EA63 for ; Thu, 14 Mar 2019 09:35:57 +0000 (UTC) (envelope-from gahr@FreeBSD.org) Received: from mail.ptrcrt.ch (mail.ptrcrt.ch [192.168.1.1]) by mail.ptrcrt.ch (OpenSMTPD) with ESMTP id 30337101; Thu, 14 Mar 2019 09:35:54 +0000 (UTC) Received: from ptrcrt.ch (mail.ptrcrt.ch [192.168.1.1]) by mail.ptrcrt.ch (OpenSMTPD) with ESMTPSA id 188fe7e4 TLS version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO; Thu, 14 Mar 2019 09:35:52 +0000 (UTC) Date: Thu, 14 Mar 2019 09:35:51 +0000 From: Pietro Cerutti To: Dan Langille Cc: freebsd-tcltk@freebsd.org Subject: Re: 2019Q1 - can't set "doc": var is read-only Message-ID: <20190314093551.bsnskmsgnulvh6dw@ptrcrt.ch> Reply-To: Pietro Cerutti References: <49F7A94D-FC3D-458A-B787-DF424D496E81@langille.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline In-Reply-To: <49F7A94D-FC3D-458A-B787-DF424D496E81@langille.org> X-PGP-Key: fp="546D E77C FA14 CEA4 480A D7FA 4099 3B5A 4A8F 3F12"; id="0x40993B5A4A8F3F12"; get=; get=; get=; get= OpenPGP: id=40993B5A4A8F3F12; url=https://gahr.ch/pgp/0x40993B5A4A8F3F12.txt; url=https://keybase.io/gahr/key.asc User-Agent: NeoMutt/20180716-1373-f1f45c X-Rspamd-Queue-Id: D95B56EA63 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.98)[-0.977,0]; ASN(0.00)[asn:196752, ipnet:2a02:2770::/32, country:NL]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: freebsd-tcltk@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FreeBSD-specific Tcl/Tk discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Mar 2019 09:35:58 -0000 On Mar 13 2019, 18:15 UTC, Dan Langille wrote: >One of our in-house tcl applications is getting an error: > >% set sec_comp [$test createComponent security #auto 1 2] >can't set "doc": var is read-only Hi Dan, which version of Tcl are you using? I assume your in-house application uses the C interface to Tcl, not just Tcl as a scripting language. If that's the case, the error you're seeing is similar to what you'd get if you tryied to write to a linked variable defined as read-only: http://tcl.tk/man/tcl8.7/TclLib/LinkVar.htm Does this sound familiar? Alternatively, you might have a trace set up to intercept writes to a variable, but that'd need to be either in your code or in some Tcl code you're using as a pkg. Example: http://core.tcl.tk/tcl/artifact/a057a170260b246e?ln=733,740 >In a test environment, I have narrowed it down to something between >2018Q4 and 2019Q1 > >The devs say "something changed" and an internal structure they used to >write to can no longer be written to. > >Does this ring any bells to folks? Internal to Tcl? Doesn't make any rings bell here :( >I'm going to start updating pkgs one by one to see which one breaks it, >but wanted feedkback in case this is a known issue. > >My searches fail. > >Thank you. Let me know if I can help any further. -- Pietro Cerutti