From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 92DCD3858024; Tue, 28 Mar 2023 15:00:37 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 92DCD3858024 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1680015637; bh=f6BdD+y1d2x6mgE0RQsUpAwRaRigWBE/g/89xxxH0qc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=L7TD/idi8QpMTDT/srqDSgTSZtG4tc6bg/f7UuCLtGBuy4rU0nnGVsORwC4DM6E5A p+NRxyPeBTwZARFsAmkHIA2jxWUFBN2N2zGojSR2CXcda7/y9CBFMwVf5snAA/4MlS NeBzgvW1PqqFmJV59X5nRplNz/I445PzMNRRbIV4= From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/103387] powerpc64le: segmentation fault on std::cout with ieee128 long double variable Date: Tue, 28 Mar 2023 15:00:37 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: major X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: redi at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103387 --- Comment #8 from Jonathan Wakely --- And that's because we're using the ostream's cached _M_num_put but that is = the wrong one: (gdb) step std::basic_ostream >::_M_insert<__ieee128> (this=3D0x101c0900 , __v=3D0.10000000000000000000000000000000000= 5) at /home/test/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/os= tream.tcc:66 66 sentry __cerb(*this); (gdb) n 67 if (__cerb) (gdb)=20 69 ios_base::iostate __err =3D ios_base::goodbit; (gdb)=20 72 const __num_put_type& __np =3D __check_facet(this->_M_num_put); (gdb) p _M_num_put $18 =3D (const std::basic_ios >::__num_put_typ= e *) 0x101c1f98 <(anonymous namespace)::num_put_c>=