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Bug 1589368 - --std=c++11 regression 'call of overloaded vector::insert is ambiguous'
Summary: --std=c++11 regression 'call of overloaded vector::insert is ambiguous'
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: gcc
Version: 7.5
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Marek Polacek
QA Contact: Michael Petlan
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-06-08 19:49 UTC by Serguei Makarov
Modified: 2018-10-30 07:28 UTC (History)
5 users (show)

Fixed In Version: gcc-4.8.5-36.el7
Doc Type: No Doc Update
Doc Text:
undefined
Clone Of:
Environment:
Last Closed: 2018-10-30 07:27:17 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1575888 1 None None None 2021-01-20 06:05:38 UTC
Red Hat Product Errata RHBA-2018:3016 0 None None None 2018-10-30 07:28:48 UTC

Internal Links: 1575888

Description Serguei Makarov 2018-06-08 19:49:28 UTC 
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
Comment 2 Serguei Makarov 2018-06-08 19:52:54 UTC 
This bug probably relates to related components, e.g. libstdc++-devel-4.8.5-35.el7.x86_64, rather than the gcc package itself.
Comment 3 Michael Petlan 2018-06-11 12:07:21 UTC 
Reproduced; gcc-4.8.5-34.el7 still builds your reproducer OK, -35.el7 fails.
Comment 6 Marek Polacek 2018-06-11 15:40:42 UTC 
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.
Comment 8 Marek Polacek 2018-06-12 17:52:49 UTC 
I'm backing out the changes made in -35.
Comment 11 Michael Petlan 2018-07-20 16:26:21 UTC 
Related tests passed with gcc-4.8.5-36.el7.
VERIFIED.
Comment 13 errata-xmlrpc 2018-10-30 07:27:17 UTC 
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
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