gsTensorBasis::elementIndex seems not right

[kmrkmrkmr]

gsTensorBasis::elementIndex reads an Eigen::VectorXd variable u, and then use it col(d - 1) or col(i), should it be row()?

I write gsTensorBSpline<2> surface(basis, coeffs); surface.basis().elementIndex(surface.basis().anchors().col(i)); and get Assert v == T(Value). I try to change it to row() and it works well.

Here is the desktop information
Arch Linux Kernel: x86_64 Linux 6.8.8-arch1-1
Gismo: version 23.12.0