From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Pip Cet Newsgroups: gmane.emacs.bugs Subject: bug#38748: 28.0.50; crash on MacOS 10.15.2 Date: Wed, 8 Jan 2020 22:18:11 +0000 Message-ID: References: <20191226130420.GB71460@breton.holly.idiocy.org> <83fth7qa3a.fsf@gnu.org> <83blrtq2j0.fsf@gnu.org> <83sgl3lyii.fsf@gnu.org> <834kxej6lc.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="229797"; mail-complaints-to="usenet@blaine.gmane.org" Cc: alan@idiocy.org, jguenther@gmail.com, Andrii Kolomoiets , 38748@debbugs.gnu.org To: Robert Pluim Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jan 08 23:19:43 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1ipJfT-000fOb-Ka for geb-bug-gnu-emacs@m.gmane-mx.org; 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Wed, 08 Jan 2020 14:18:47 -0800 (PST) In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:174386 Archived-At: On Wed, Jan 8, 2020 at 9:43 PM Robert Pluim wrote: > gcc --version > Configured with: --prefix=3D/Library/Developer/CommandLineTools/usr --wit= h-gxx-include-dir=3D/usr/include/c++/4.2.1 > Apple LLVM version 10.0.1 (clang-1001.0.46.4) > Target: x86_64-apple-darwin18.7.0 > Thread model: posix > InstalledDir: /Library/Developer/CommandLineTools/usr/bin > > I=CA=BCve attached the disassembly of the two versions. They're very very > similar (this is with -g3 -O0). But wait, doesn't the bug happen in both unoptimized versions? I should have been clearer: my suspicion is the bug only goes away if tail calls are optimized, which happens only with optimizations enabled.