g++ /tmp/OdtCxTkKVf.cpp
In file included from /usr/include/c++/9/algorithm:62,
                 from /tmp/OdtCxTkKVf.cpp:1:
/usr/include/c++/9/bits/stl_algo.h: In instantiation of 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]':
/usr/include/c++/9/bits/stl_algo.h:1884:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1970:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = char (*)[6]; _Compare = main()::<lambda(const char*, const char*)>]'
/tmp/OdtCxTkKVf.cpp:14:77:   required from here
/usr/include/c++/9/bits/stl_algo.h:1849:3: error: array must be initialized with a brace-enclosed initializer
 1849 |   __val = _GLIBCXX_MOVE(*__i);
      |   ^~~~~
/usr/include/c++/9/bits/stl_algo.h:1851:17: error: invalid array assignment
 1851 |        *__first = _GLIBCXX_MOVE(__val);
      |                 ^
In file included from /usr/include/c++/9/bits/stl_algo.h:61,
                 from /usr/include/c++/9/algorithm:62,
                 from /tmp/OdtCxTkKVf.cpp:1:
/usr/include/c++/9/bits/stl_heap.h: In instantiation of 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]':
/usr/include/c++/9/bits/stl_algo.h:1671:23:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1932:25:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1947:27:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = char (*)[6]; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1967:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = char (*)[6]; _Compare = main()::<lambda(const char*, const char*)>]'
/tmp/OdtCxTkKVf.cpp:14:77:   required from here
/usr/include/c++/9/bits/stl_heap.h:341:15: error: array must be initialized with a brace-enclosed initializer
  341 |    _ValueType __value = _GLIBCXX_MOVE(*(__first + __parent));
      |               ^~~~~~~
/usr/include/c++/9/bits/stl_heap.h: In instantiation of 'void std::__pop_heap(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]':
/usr/include/c++/9/bits/stl_algo.h:1674:19:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1932:25:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1947:27:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = char (*)[6]; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:1967:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = char (*)[6]; _Compare = main()::<lambda(const char*, const char*)>]'
/tmp/OdtCxTkKVf.cpp:14:77:   required from here
/usr/include/c++/9/bits/stl_heap.h:251:18: error: array must be initialized with a brace-enclosed initializer
  251 |       _ValueType __value = _GLIBCXX_MOVE(*__result);
      |                  ^~~~~~~
/usr/include/c++/9/bits/stl_heap.h:252:17: error: invalid array assignment
  252 |       *__result = _GLIBCXX_MOVE(*__first);
      |                 ^
/usr/include/c++/9/bits/stl_heap.h:214:5: warning: 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = char (*)[6]; _Distance = long int; _Tp = char*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const char*, const char*)> >]' used but never defined
  214 |     __adjust_heap(_RandomAccessIterator __first, _Distance __holeIndex,
      |     ^~~~~~~~~~~~~
In file included from /usr/include/c++/9/algorithm:62,
                 from /tmp/OdtCxTkKVf.cpp:1:
/usr/include/c++/9/bits/stl_algo.h:1820:5: warning: 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = char (*)[6]; _Compare = __gnu_cxx::__ops::_Val_comp_iter<main()::<lambda(const char*, const char*)> >]' used but never defined
 1820 |     __unguarded_linear_insert(_RandomAccessIterator __last,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/algorithm:61,
                 from /tmp/OdtCxTkKVf.cpp:1:
/usr/include/c++/9/bits/predefined_ops.h:225:5: warning: '__gnu_cxx::__ops::_Val_comp_iter<_Compare> __gnu_cxx::__ops::__val_comp_iter(__gnu_cxx::__ops::_Iter_comp_iter<_Compare>) [with _Compare = main()::<lambda(const char*, const char*)>]' used but never defined
  225 |     __val_comp_iter(_Iter_comp_iter<_Compare> __comp)
      |     ^~~~~~~~~~~~~~~