The following generate two function spaces that should effectively be vector fields, in which vectors have size 6.

We = basix.ufl.quadrature_element(domain.basix_cell(), degree=0, scheme="default", value_shape=(6,))
W = fem.functionspace(domain, We)

V = fem.functionspace(domain, ("CG", 2, (6,)))

However, fenicsx treats W as scalar field, in which each "scalar" is a vector of size 6.

Upon calling Adapter.write_data from fenicsxprecice.py:216, it calls determine_function_type from adapter_core.py:58.
In there the function type is determined using the number of sub spaces via input_fspace.num_sub_spaces.

One option to mitigate this, might be by determining the function type via the function's value_size, i.e., input_fspace.value_size.

Due to this misinterpretation of the function space, most likely preCICE buffers are accessed incorrectly, leading to the Segfault.