Bug 1589368
| Summary: | --std=c++11 regression 'call of overloaded vector::insert is ambiguous' | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Serguei Makarov <smakarov> |
| Component: | gcc | Assignee: | Marek Polacek <mpolacek> |
| Status: | CLOSED ERRATA | QA Contact: | Michael Petlan <mpetlan> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.5 | CC: | fweimer, jakub, jwakely, mcermak, ohudlick |
| Target Milestone: | rc | Keywords: | TestBlocker |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | gcc-4.8.5-36.el7 | Doc Type: | No Doc Update |
| Doc Text: |
undefined
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 07:27:17 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This bug probably relates to related components, e.g. libstdc++-devel-4.8.5-35.el7.x86_64, rather than the gcc package itself. Reproduced; gcc-4.8.5-34.el7 still builds your reproducer OK, -35.el7 fails. Caused by my changes in #1575888, whereby I adjusted std::vector::insert signatures to match what's documented in http://en.cppreference.com/w/cpp/container/vector/insert. Looks like we need r200458 too, but this is getting a little bit crazy; maybe we should back out the changes made in #1575888 and suggest using DTS for C++11 there. I'm backing out the changes made in -35. Related tests passed with gcc-4.8.5-36.el7. VERIFIED. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3016 |
Description of problem: Packages that built with gcc-c++-4.8.5-28.el7.x86_64 no longer build in gcc-c++-4.8.5-35.el7.x86_64 from the RHEL 7.5 nightly repo. Version-Release number of selected component (if applicable): gcc-c++-4.8.5-35.el7.x86_64 How reproducible: $ cat >reproducer.cxx #include <vector> #include <string> using namespace std; int main () { vector<string> cmd; auto mode = "always"; cmd.insert(cmd.end(), { "-C", mode }); } $ g++ --std=c++11 reproducer.cxx -o reproducer Actual results: reproducer.cxx: In function ‘int main()’: reproducer.cxx:9:45: error: call of overloaded ‘insert(std::vector<std::basic_string<char> >::iterator, <brace-enclosed initializer list>)’ is ambiguous cmd.insert(cmd.end(), { "-C", mode }); ^ reproducer.cxx:9:45: note: candidates are: In file included from /usr/include/c++/4.8.2/vector:69:0, from reproducer.cxx:1: /usr/include/c++/4.8.2/bits/vector.tcc:107:5: note: std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::iterator, const value_type&) [with _Tp = std::basic_string<char>; _Alloc = std::allocator<std::basic_string<char> >; std::vector<_Tp, _Alloc>::iterator = __gnu_cxx::__normal_iterator<std::basic_string<char>*, std::vector<std::basic_string<char> > >; typename std::_Vector_base<_Tp, _Alloc>::pointer = std::basic_string<char>*; std::vector<_Tp, _Alloc>::value_type = std::basic_string<char>] vector<_Tp, _Alloc>:: ^ In file included from /usr/include/c++/4.8.2/vector:64:0, from reproducer.cxx:1: /usr/include/c++/4.8.2/bits/stl_vector.h:988:7: note: std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::iterator, std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::basic_string<char>; _Alloc = std::allocator<std::basic_string<char> >; std::vector<_Tp, _Alloc>::iterator = __gnu_cxx::__normal_iterator<std::basic_string<char>*, std::vector<std::basic_string<char> > >; typename std::_Vector_base<_Tp, _Alloc>::pointer = std::basic_string<char>*; std::vector<_Tp, _Alloc>::value_type = std::basic_string<char>] insert(iterator __position, value_type&& __x) ^ /usr/include/c++/4.8.2/bits/stl_vector.h:1005:7: note: std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::initializer_list<_Tp>) [with _Tp = std::basic_string<char>; _Alloc = std::allocator<std::basic_string<char> >; std::vector<_Tp, _Alloc>::iterator = __gnu_cxx::__normal_iterator<std::basic_string<char>*, std::vector<std::basic_string<char> > >; typename std::_Vector_base<_Tp, _Alloc>::pointer = std::basic_string<char>*; std::vector<_Tp, _Alloc>::const_iterator = __gnu_cxx::__normal_iterator<const std::basic_string<char>*, std::vector<std::basic_string<char> > >; typename __gnu_cxx::__alloc_traits<typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type>::const_pointer = const std::basic_string<char>*] insert(const_iterator __position, initializer_list<value_type> __l) Expected results: Program compiles and runs without errors. Additional info: Package obtained from the following repos: [nightly] name=nightly for Red Hat Enterprise Linux $releasever baseurl=http://download.lab.bos.redhat.com/nightly/latest-RHEL-7/compose/Server/x86_64/os enabled=1 gpgcheck=0 [nightly-opt] name=nightly for Red Hat Enterprise Linux $releasever baseurl=http://download.lab.bos.redhat.com/nightly/latest-RHEL-7/compose/Server-optional/x86_64/os enabled=1 gpgcheck=0 [nightly-debug] name=nightly debug for Red Hat Enterprise Linux $releasever baseurl=http://download.lab.bos.redhat.com/nightly/latest-RHEL-7/compose/Server/x86_64/debug/tree enabled=1 gpgcheck=0 [nightly-opt-debug] name=nightly debug for Red Hat Enterprise Linux $releasever baseurl=http://download.lab.bos.redhat.com/nightly/latest-RHEL-7/compose/Server-optional/x86_64/debug/tree enabled=1 gpgcheck=0