FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result. In /home/docs/checkouts/readthedocs.org/user_builds/nutils/checkouts/v4.0/nutils/topology.py:1220

FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result. In /home/docs/checkouts/readthedocs.org/user_builds/nutils/checkouts/v4.0/nutils/topology.py:1221

integrating 1+1+1+1 distinct blocks

solving system using sparse direct solver

solver returned with residual 5e-17

integrating 1 distinct blocks

integrating 1 distinct blocks

RuntimeWarning: singular matrix In /home/docs/checkouts/readthedocs.org/user_builds/nutils/checkouts/v4.0/nutils/warnings.py:30