From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?Gerd_M=C3=B6llmann?= Newsgroups: gmane.emacs.devel Subject: MPS: assertion failed: header_type (h) != IGC_OBJ_FWD Date: Sun, 14 Jul 2024 06:12:33 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15535"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Pip Cet , Helmut Eller To: Emacs Devel Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Jul 14 06:13:34 2024 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sSqc9-0003v8-KR for ged-emacs-devel@m.gmane-mx.org; Sun, 14 Jul 2024 06:13:33 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sSqbJ-0004mw-14; Sun, 14 Jul 2024 00:12:41 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sSqbH-0004ma-Iq for emacs-devel@gnu.org; Sun, 14 Jul 2024 00:12:39 -0400 Original-Received: from mail-ej1-x62f.google.com ([2a00:1450:4864:20::62f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sSqbF-0003Q5-BH for emacs-devel@gnu.org; Sun, 14 Jul 2024 00:12:38 -0400 Original-Received: by mail-ej1-x62f.google.com with SMTP id a640c23a62f3a-a77bf336171so552045066b.1 for ; Sat, 13 Jul 2024 21:12:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1720930356; x=1721535156; darn=gnu.org; h=mime-version:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to; bh=8iS3pD8qFhjnBuNpoD9KB/3IsTa27n43PS9Osp+h534=; b=cKyAV/pfGTTL31aIYaMVs7qLhvMmfLrTHDL004X1xKIjQqn+/Ymh6qh17AiipLtrhC 07OZ7Uwp+7+hqa+FcqY1BDOYPdCQtnYPA90V+RBGw50Ge8L+5nKLBzQTr6KLhT27DgLu OSeExWmm6fNVQL+w5FcpqrZOtlQ4hsorsq51n8BZvW5H9s81Db1mN/g/8uXv4f13w6jB b2i+8mUCzvJ0gUR1U2mVTVFof0vN4zu/ZEmtMLGKAY4y+GMILZzeiAzK5L09hfVRQVUM VahIR2XKykks4ZVprwLADl4ICnV2jvid0e6l4felYABxZauNFzhp9BzBFn/WhmM1EbpP aY7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720930356; x=1721535156; h=mime-version:message-id:date:subject:cc:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8iS3pD8qFhjnBuNpoD9KB/3IsTa27n43PS9Osp+h534=; b=DC/9OoqJku++3t1ZD/OE/ygfo26GiSjk94ddD1xYwvDMe21IKOFklQYSzDtgFZUFpM cCaL/nGfwWWkeCHEAj8fdsr6PBCQXViLEiTuCQb2CxMjgSJ76rMHP4OoRu2kZVX59nNn WB5lsfHjRCDR5H2YbkVdPqyiZ8ohq03R7cwKDayJiOuOIgcOEEQEe+4bgJ7n4jW92mkr NW5EMcRjdpbBm7tymxbG59y9aHOhWjP3d8+9A8C0Y7O38OsgyVp3ytQkkhEAAfXI/m1G x52DXOGEqr2I642arBBoWdyBLWjbFQ48A+7sI5bSo6T9jjXspvYhGRRVWdbLaJ2O41Cj dOYw== X-Gm-Message-State: AOJu0YyuHhQjhw11wqpxQ2LtoQoKOpkoxyi1k3GlQhOwIk5DuY9vhv9u tNLrXLFoAJ25MCG4XOGjwZBDV0FI64mbk9P4kwJ0E/lzQ5LVmn87 X-Google-Smtp-Source: AGHT+IHka5EefrphEKjHVzlifRvQmOuwI2fz8LDBCAEaSft/eilCuh/HBwtxJquWWPor5aCnC+3jsA== X-Received: by 2002:a17:906:3989:b0:a77:ca9d:1d46 with SMTP id a640c23a62f3a-a799cd38df1mr491984166b.33.1720930355559; Sat, 13 Jul 2024 21:12:35 -0700 (PDT) Original-Received: from pro2.fritz.box (p4fe3a395.dip0.t-ipconnect.de. [79.227.163.149]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a79bc5a3a93sm96591866b.6.2024.07.13.21.12.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 13 Jul 2024 21:12:34 -0700 (PDT) Received-SPF: pass client-ip=2a00:1450:4864:20::62f; envelope-from=gerd.moellmann@gmail.com; helo=mail-ej1-x62f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:321620 Archived-At: I'm seeing this assertion sometimes in an Emacs built with --enable-checking=igc_debug,igc_check_fwd,w here sometines means it can take days of using/running Emacs, or it can take a couple of hours. This is macOS 14, arm64. I'm linking with -lmps-debug. The assertion means that we likely have a reference somewhere that isn't traced. Because it isn't traced, the reference isn't changed to point to the new location when the object being references is copied to a new address in memory. Instead, it points to kind of a tombstone that is left behind when the object is moved. Alas, I haven't been able to debug this. One problem is that I can't reproduce it easily, the other is that is is either not happening or happening much less often when building with -O0, and without -O0 I can't see much here. This is just to let people know of the problem. If you find a recipe how to reproduce this, please let me know. Or better yet, debug it :-).