From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 217303955CBC; Tue, 10 May 2022 11:15:34 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 217303955CBC From: "jvb at cyberscience dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/105545] New: Compiling string assignment with _GLIBCXX_ASSERTIONS defined fails in 12.1.0, works in 11.1.0 Date: Tue, 10 May 2022 11:15:33 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 12.1.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jvb at cyberscience dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 May 2022 11:15:34 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105545 Bug ID: 105545 Summary: Compiling string assignment with _GLIBCXX_ASSERTIONS defined fails in 12.1.0, works in 11.1.0 Product: gcc Version: 12.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: jvb at cyberscience dot com Target Milestone: --- Compiling using -D_GLIBCXX_ASSERTIONS fails in gcc 12.1.0, worked in 11.1.0: #include extern std::string a(); std::string a() { std::string x; x.assign( "Z" ); return x; } using command line: g++ -m64 -c -std=3Dgnu++17 -Wall -O3 -Werror -D_GLIBCXX_ASSERTIONS x.cpp fails with: In file included from /usr/local/gcc-12.1.0/include/c++/12.1.0/string:40, from x.cpp:14: In static member function ??static std::char_traits::char_type* std::char_traits::copy(char_type*, const char_type*, std::size_t)??, inlined from ??static void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::_S_copy(_CharT*, const _CharT*, size_type) [with _CharT =3D char; _Traits =3D std::char_traits; _Alloc =3D std::allocator]?? at /usr/local/gcc-12.1.0/include/c++/12.1.0/bits/basic_string.h:423:21, inlined from ??std::__cxx11::basic_string<_CharT, _Traits, _Allocator>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::_M_replace(size_type, size_type, const _CharT*, size_type) [with _CharT =3D char; _Traits =3D std::char_traits; _Alloc =3D std::allocator]?? at /usr/local/gcc-12.1.0/include/c++/12.1.0/bits/basic_string.tcc:532:22, inlined from ??std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::assign(const _CharT*) [with _CharT =3D char; _Traits =3D std::char_traits; _Alloc =3D std::allocator]?? at /usr/local/gcc-12.1.0/include/c++/12.1.0/bits/basic_string.h:1647:19, inlined from ??std::string a()?? at x.cpp:22:12: /usr/local/gcc-12.1.0/include/c++/12.1.0/bits/char_traits.h:431:56: error: ??void* __builtin_memcpy(void*, const void*, long unsigned int)?? accessing 9223372036854775810 or more bytes at offsets [2, 9223372036854775807] and 17 may overlap up to 9223372036854775813 bytes at offset -3 [-Werror=3Drestric= t] 431 | return static_cast(__builtin_memcpy(__s1, __s2, __n)); |=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ cc1plus: all warnings being treated as errors=