This code works in GCC 6.1, but causes a compile error in GCC 5.5:
#include <memory>
#include <unordered_map>
#include <vector>
std::unordered_map<int, std::shared_ptr<std::vector<uint8_t>>> foo;
int main() {
foo.emplace(0, new std::vector<uint8_t>(1));
}
The error is below. Is there any way around this (I assume) bug?
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h: In instantiation of 'void
__gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >; _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*}; _Tp = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >]':
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/alloc_traits.h:530:4: required from 'static void std::allocator_traits<std::allocator<_Tp1>
>::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >; _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*}; _Tp = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > > >]'
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/hashtable_policy.h:1955:37: required from 'std::__detail::_Hashtable_alloc<_NodeAlloc>::__node_type* std::__detail::_Hashtable_alloc<_NodeAlloc>::_M_allocate_node(_Args&& ...) [with _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*}; _NodeAlloc = std::allocator<std::__detail::_Hash_node<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >, false> >; std::__detail::_Hashtable_alloc<_NodeAlloc>::__node_type = std::__detail::_Hash_node<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >, false>]'
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/hashtable.h:1517:77: required from 'std::pair<typename std::__detail::_Hashtable_base<_Key,
_Value, _ExtractKey, _Equal, _H1, _H2, _Hash, _Traits>::iterator, bool> std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1,
_H2, _Hash, _RehashPolicy, _Traits>::_M_emplace(std::true_type, _Args&& ...) [with _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*}; _Key = int; _Value = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >;
_Alloc = std::allocator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > > >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<int>; _H1 = std::hash<int>; _H2 = std::__detail::_Mod_range_hashing; _Hash = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<false, false, true>; typename std::__detail::_Hashtable_base<_Key, _Value, _ExtractKey, _Equal, _H1,
_H2, _Hash, _Traits>::iterator = std::__detail::_Node_iterator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >, false, false>; std::true_type = std::integral_constant<bool, true>]'
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/hashtable.h:726:21: required from 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey,
_Equal, _H1, _H2, _Hash, _RehashPolicy, _Traits>::__ireturn_type std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2,
_Hash, _RehashPolicy, _Traits>::emplace(_Args&& ...) [with _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*};
_Key = int; _Value = std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >; _Alloc = std::allocator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > > >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<int>; _H1 = std::hash<int>; _H2 = std::__detail::_Mod_range_hashing; _Hash = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<false, false, true>; std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2,
_Hash, _RehashPolicy, _Traits>::__ireturn_type = std::pair<std::__detail::_Node_iterator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >, false, false>, bool>]'
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/unordered_map.h:380:54: required from 'std::pair<typename std::_Hashtable<_Key, std::pair<const _Key, _Tp>, _Alloc, std::__detail::_Select1st, _Pred,
_Hash, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<std::__not_<std::__and_<std::__is_fast_hash<_Hash>, std::__detail::__is_noexcept_hash<_Key, _Hash> > >::value, false, true> >::iterator, bool> std::unordered_map<_Key, _Tp, _Hash, _Pred,
_Alloc>::emplace(_Args&& ...) [with _Args = {int, std::vector<unsigned char, std::allocator<unsigned char> >*}; _Key = int; _Tp = std::shared_ptr<std::vector<unsigned char> >; _Hash = std::hash<int>;
_Pred = std::equal_to<int>; _Alloc = std::allocator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > > >; typename std::_Hashtable<_Key, std::pair<const _Key, _Tp>, _Alloc, std::__detail::_Select1st, _Pred, _Hash, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<std::__not_<std::__and_<std::__is_fast_hash<_Hash>, std::__detail::__is_noexcept_hash<_Key, _Hash> > >::value, false, true> >::iterator = std::__detail::_Node_iterator<std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >, false, false>]'
<source>:8:47: required from here
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: error: no matching function for call to 'std::pair<const int, std::shared_ptr<std::vector<unsigned char> > >::pair(int, std::vector<unsigned char>*)'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:206:9: note: candidate: template<class ... _Args1, long unsigned int ..._Indexes1, class ... _Args2, long unsigned int ..._Indexes2> std::pair<_T1, _T2>::pair(std::tuple<_Args1 ...>&, std::tuple<_Args2 ...>&, std::_Index_tuple<_Indexes1 ...>, std::_Index_tuple<_Indexes2 ...>)
pair(tuple<_Args1...>&, tuple<_Args2...>&,
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:206:9: note: template argument deduction/substitution failed:
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: note: mismatched types 'std::tuple<_Elements ...>' and 'int'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:155:9: note: candidate: template<class ... _Args1, class ... _Args2> std::pair<_T1, _T2>::pair(std::piecewise_construct_t, std::tuple<_Args1 ...>, std::tuple<_Args2 ...>)
pair(piecewise_construct_t, tuple<_Args1...>, tuple<_Args2...>);
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:155:9: note: template argument deduction/substitution failed:
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: note: cannot convert 'std::forward<int>((* & __args#0))' (type 'int') to type 'std::piecewise_construct_t'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:150:12: note: candidate: template<class _U1, class _U2, class> constexpr std::pair<_T1, _T2>::pair(std::pair<_U1, _U2>&&)
constexpr pair(pair<_U1, _U2>&& __p)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:150:12: note: template argument deduction/substitution failed:
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: note: mismatched types 'std::pair<_T1, _T2>' and 'int'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:144:12: note: candidate: template<class _U1, class _U2, class> constexpr std::pair<_T1, _T2>::pair(_U1&&, _U2&&)
constexpr pair(_U1&& __x, _U2&& __y)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:144:12: note: template argument deduction/substitution failed:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:141:38: error: no type named 'type' in 'struct std::enable_if<false, void>'
template<class _U1, class _U2, class = typename
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:138:12: note: candidate: template<class _U2, class> constexpr std::pair<_T1,
_T2>::pair(const _T1&, _U2&&)
constexpr pair(const _T1& __x, _U2&& __y)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:138:12: note: template argument deduction/substitution failed:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:136:27: error: no type named 'type' in 'struct std::enable_if<false, void>'
template<class _U2, class = typename
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:133:12: note: candidate: template<class _U1, class> constexpr std::pair<_T1,
_T2>::pair(_U1&&, const _T2&)
constexpr pair(_U1&& __x, const _T2& __y)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:133:12: note: template argument deduction/substitution failed:
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: note: cannot convert 'std::forward<std::vector<unsigned char>*>((* &
__args#1))' (type 'std::vector<unsigned char>*') to type 'const std::shared_ptr<std::vector<unsigned char> >&'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:128:17: note: candidate: constexpr std::pair<_T1, _T2>::pair(std::pair<_T1,
_T2>&&) [with _T1 = const int; _T2 = std::shared_ptr<std::vector<unsigned char> >]
constexpr pair(pair&&) = default;
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:128:17: note: candidate expects 1 argument, 2 provided
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:127:17: note: candidate: constexpr std::pair<_T1, _T2>::pair(const std::pair<_T1, _T2>&) [with _T1 = const int; _T2 = std::shared_ptr<std::vector<unsigned char> >]
constexpr pair(const pair&) = default;
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:127:17: note: candidate expects 1 argument, 2 provided
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:124:12: note: candidate: template<class _U1, class _U2, class> constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&)
constexpr pair(const pair<_U1, _U2>& __p)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:124:12: note: template argument deduction/substitution failed:
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/x86_64-linux-gnu/bits/c++allocator.h:33:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/allocator.h:46,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:63,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/ext/new_allocator.h:120:4: note: mismatched types 'const std::pair<_T1, _T2>' and 'int'
{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
^
In file included from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_algobase.h:64:0,
from /opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/memory:62,
from <source>:1:
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:112:26: note: candidate: constexpr std::pair<_T1, _T2>::pair(const _T1&, const
_T2&) [with _T1 = const int; _T2 = std::shared_ptr<std::vector<unsigned char> >]
_GLIBCXX_CONSTEXPR pair(const _T1& __a, const _T2& __b)
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:112:26: note: no known conversion for argument 2 from 'std::vector<unsigned char>*' to 'const std::shared_ptr<std::vector<unsigned char> >&'
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:108:26: note: candidate: constexpr std::pair<_T1, _T2>::pair() [with _T1 = const int; _T2 = std::shared_ptr<std::vector<unsigned char> >]
_GLIBCXX_CONSTEXPR pair()
^
/opt/compiler-explorer/gcc-5.5.0/include/c++/5.5.0/bits/stl_pair.h:108:26: note: candidate expects 0 arguments, 2 provided
Compiler returned: 1
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