Computation of the resulting static shape for the general tensor multiplication is not correct

[bassoy]

Lambda function

ublas/include/boost/numeric/ublas/tensor/functions.hpp

Line 359 in 32795e1

auto extents_result = [&e1 = na, &e2 = nb, &a1 = phia, &a2 = phib](){

performs a wrong computation of the resulting static shape invoked in line

ublas/examples/tensor/multiply_tensors_product_function.cpp

Line 312 in 32795e1

// auto C1 = C + prod(A,A,perm_t{1,2}) + 5.0F;