From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Robert Pluim Newsgroups: gmane.emacs.bugs Subject: bug#49066: 26.3; Segmentation fault on specific utf8 string Date: Thu, 17 Jun 2021 09:43:03 +0200 Message-ID: <87czsl543c.fsf@gmail.com> References: <871r91ikdv.fsf@gnus.org> <83czsl0z4z.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1266"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 49066@debbugs.gnu.org, Lars Ingebrigtsen , mvsfrasson@gmail.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jun 17 09:44:10 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1ltmh8-000Adr-9m for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 17 Jun 2021 00:43:04 -0700 (PDT) In-Reply-To: <83czsl0z4z.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 17 Jun 2021 09:43:40 +0300") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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.io gmane.emacs.bugs:208656 Archived-At: >>>>> On Thu, 17 Jun 2021 09:43:40 +0300, Eli Zaretskii said: >> I can reproduce the crash in Emacs 26.1, but not in Emacs 27.1, so I >> guess this has been fixed in later versions of Emacs? Eli> I cannot reproduce at all, neither in Emacs 26 nor in all subsequent Eli> versions. Eli> Lars, can you show a backtrace from the crash? Perhaps if I see that, Eli> I could tell if it's a known (and fixed) problem. Eli> Thanks. This is from an optimized build of emacs-26.1. I can redo it with a '-g3 -O0' if you want. Thread 1 "emacs" received signal SIGSEGV, Segmentation fault. ftfont_shape_by_flt (matrix=, otf=, ft_face=, font=, lgstring=...) at ftfont.c:2573 2573 g->g.to = LGLYPH_TO (LGSTRING_GLYPH (lgstring, g->g.to)); (gdb) bt #0 ftfont_shape_by_fltPython Exception value has been optimized out: (matrix=, otf=, ft_face=, font=, lgstring=) at ftfont.c:2573 #1 ftfont_shapePython Exception value has been optimized out: (lgstring=, lgstring@entry=XIL(0xaa2755)) at ftfont.c:2615 #2 0x00000000005d97f5 in xftfont_shape (lgstring=XIL(0xaa2755)) at xftfont.c:670 #3 0x000000000057fc2a in Ffont_shape_gstringPython Exception value has been optimized out: (gstring=) at font.c:4427 #4 0x000000000056fede in funcall_subr (subr=0x97fac0 , numargs=numargs@entry=1, args=args@entry=0x7fffffff59a0) at eval.c:2844 #5 0x000000000056ecff in Ffuncall (nargs=, args=args@entry=0x7fffffff5998) at lisp.h:600 Robert --