From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id SCI5Ia+eS2YbJxgAWB0awg (envelope-from ) for ; Mon, 20 May 2024 15:04:15 -0400 Authentication-Results: simark.ca; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.a=rsa-sha256 header.s=default header.b=gKo1CVTl; dkim-atps=neutral Received: by simark.ca (Postfix, from userid 112) id 6876B1E0C1; Mon, 20 May 2024 15:04:15 -0400 (EDT) Received: from server2.sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 4D1C61E030 for ; Mon, 20 May 2024 15:04:13 -0400 (EDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id B77BE3858CD1 for ; Mon, 20 May 2024 19:04:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B77BE3858CD1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1716231852; bh=s4cMTsyxkN/mx4McqZZlmtMbniKDSUVAeCzh2q98moY=; h=Date:To:Subject:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=gKo1CVTl8WOlL3/ZEaHZDY3sXD4lAn7jyi0VuYDtIFRn0j6WUEHda9G3t/e+Zaoc7 PHa0/WhkMA67aaHH7JwUu+ZFsdSxaTxdNfsWbmjavMOa1N1uySZ0XsZs3KIh2TZnN8 +ytWgOKqS2hbL7RNE3/TL45wTUrAk1v3yxJULdds= Received: from eggs.gnu.org (eggs.gnu.org [IPv6:2001:470:142:3::10]) by sourceware.org (Postfix) with ESMTPS id EF8B83858D1E for ; Mon, 20 May 2024 19:03:33 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org EF8B83858D1E ARC-Filter: OpenARC Filter v1.0.0 sourceware.org EF8B83858D1E ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1716231815; cv=none; b=CjVOgIfs7K96/7v3jRWtvUgTg+rNGMOgcaKuFipkgsxkuIZz+J8xjf7x1CUhnqutmUhC277myYr2nyCkpKuyit5796UE3fVQTga4sNpmXr/+Fe69hY+pVIqZhVnUcveOFlSIS3F19bTr7BPahIAlYCJ2cbu4/aa+Bgp3X38UKCY= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1716231815; c=relaxed/simple; bh=E2ZJOzqv7u2HeGPczWWwA/QcoI/FvugGq9LAcDtWyMQ=; h=DKIM-Signature:Date:Message-Id:From:To:Subject; b=ii4mRWviWpwX1WuFPyrhCWG8Z7JCuL46RFJn2B1rH8M5nacW4R29K/bOM5lV0fLwWgJGpgbVSTXOYSDpwbCvFWpuKefFYVarSiatlCRivSnonpag/WbTf4HpV+UYziNXmsJPsvUrnuwiM51dmonS/86ydTaAgyDZerjNSgGAFFc= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s98IH-0000e5-DS for gdb@sourceware.org; Mon, 20 May 2024 15:03:33 -0400 Date: Mon, 20 May 2024 22:03:31 +0300 Message-Id: <86ttis8fwc.fsf@gnu.org> To: gdb@sourceware.org Subject: Debugging crashes when backtrace is not useful X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gdb@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Eli Zaretskii via Gdb Reply-To: Eli Zaretskii Errors-To: gdb-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb" Hi, An Emacs user on Windows reported frequent crashes, but when run from GDB, the relevant thread shows backtrace of zero: (gdb) bt #0 0x0000000000000000 in ?? () #1 0x0000000000000000 in ?? () What can be done to try to understand what code produces this, and why? TIA