GEMM for TensorMap does not compile

[wavefunction91]

The following snippet does not compile

#include <iostream>
#include <btas/btas.h>


typedef btas::RangeNd<CblasColMajor> RangeColMajor; 
int main() {
  std::vector<double> data(10);
  std::vector<double> data2(10);
  std::fill_n(data.begin(),10,0.0);
  std::fill_n(data2.begin(),10,0.0);

  auto map = btas::make_map(&data[0],RangeColMajor{5,5,1});
  auto map2 = btas::make_map(&data[0],RangeColMajor{5,5,1});
  auto map3 = btas::make_map(&data2[0],RangeColMajor{5,5});
  contract(1.0,map,{1,2,3},map2,{4,2,3},0.0,map3,{1,4});
  return 0;

};

The following errors are given with GCC 5.3.0

BTAS/btas/generic/contract.h:155:7: error: ‘class btas::TensorView<double, btas::RangeNd<(CBLAS_ORDER)1u>, btas::infinite_sequence_adaptor<double*, void>, btas::TensorViewPolicy<> >’ has no member named ‘resize’
       C.resize(__zero_shape);

BTAS/btas/tensorview.h:172:20: error: use of deleted function ‘btas::detail::bool_type<true>& btas::detail::bool_type<true>::operator=(const btas::detail::bool_type<true>&)’
         can_write_ = x.can_write_;

BTAS/btas/util/sequence_adaptor.h:80:35: error: invalid static_cast from type ‘const std::reference_wrapper<btas::infinite_sequence_adaptor<double*, void> >’ to type ‘std::reference_wrapper<btas::infinite_sequence_adaptor<double*, void> >::type& {aka btas::infinite_sequence_adaptor<double*, void>&}’
         static_cast<type&>(*this) = static_cast<type&>(x);

followed by repeats of some combination of these errors at other parts of BTAS. Creating the TensorMaps compiles without problems.