Exception raised on the construction of the tensor from the tensor_expression

[amitsingh19975]

When constructing expression such as A + 3 * B and constructing a tensor out of the expression, the exception is raised, which should not happen.

    using tensor_t = tensor_dynamic<float>;
    auto const e = extents<>{3,2};

    auto const a = tensor_t(e, 1.f);

    auto const three = 3.f;
    auto const expr = a + three * a;
    auto const t = tensor_t(expr); // exception