https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84998
Bug ID: 84998
Summary: [8 Regression] std::hash<std::bitset<N>> fails in
Debug Mode
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
#define _GLIBCXX_DEBUG
#include <bitset>
int main()
{
std::bitset<1> b;
std::hash<std::bitset<1>> h;
return h(b);
}
In file included from bs.cc:2:
/home/jwakely/gcc/8/include/c++/8.0.1/bitset: In instantiation of 'std::size_t
std::hash<std::__cxx1998::bitset<_Nb> >::operator()(const
std::__cxx1998::bitset<_Nb>&) const [with long unsigned int _Nb = 1;
std::size_t = long unsigned int]':
/home/jwakely/gcc/8/include/c++/8.0.1/debug/bitset:421:56: required from
'std::size_t std::hash<std::__debug::bitset<_Nb> >::operator()(const
std::__debug::bitset<_Nb>&) const [with long unsigned int _Nb = 1; std::size_t
= long unsigned int]'
bs.cc:7:13: required from here
/home/jwakely/gcc/8/include/c++/8.0.1/bitset:1568:30: error: 'const _WordT*
std::__cxx1998::_Base_bitset<1>::_M_getdata() const' is inaccessible within
this context
return std::_Hash_impl::hash(__b._M_getdata(), __clength);
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/bitset:415:7: note: declared here
_M_getdata() const noexcept
^~~~~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/bitset:1568:30: error:
'std::__cxx1998::_Base_bitset<1>' is not an accessible base of 'const
std::__cxx1998::bitset<1>'
return std::_Hash_impl::hash(__b._M_getdata(), __clength);
~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
