Test failures on Julia master

[fredrikekre]

Grid topology: Error During Test at /home/runner/work/Ferrite.jl/Ferrite.jl/test/test_grid_dofhandler_vtk.jl:277
  Test threw exception
  Expression: all(iszero, topology.vertex_neighbor)
  MethodError: reducing over an empty collection is not allowed; consider supplying `init` to the reducer
  Stacktrace:
   [1] _mapreduce(f::typeof(iszero), op::Function, #unused#::IndexCartesian, A::SparseMatrixCSC{Ferrite.EntityNeighborhood, Int64})
     @ SparseArrays /opt/hostedtoolcache/julia/nightly/x64/share/julia/stdlib/v1.9/SparseArrays/src/sparsematrix.jl:2172
   [2] _all(f::Function, A::SparseMatrixCSC{Ferrite.EntityNeighborhood, Int64}, #unused#::Colon)
     @ SparseArrays /opt/hostedtoolcache/julia/nightly/x64/share/julia/stdlib/v1.9/SparseArrays/src/sparsematrix.jl:2194

Likely due to upgraded SparseArrays in JuliaLang/julia#46790, but not sure if the problem is there or here.

[koehlerson]

julia> using Ferrite

julia> hexgrid = generate_grid(Hexahedron,(2,2,1));

julia> topology = ExclusiveTopology(hexgrid);

julia> all(iszero,topology.vertex_neighbor)
true

julia> topology.vertex_neighbor
0×0 SparseArrays.SparseMatrixCSC{Ferrite.EntityNeighborhood, Int64} with 0 stored entries

Is this a behavior change for 0x0 matrices?

[KristofferC]

Any idea of the exact change that caused this?

[fredrikekre]

JuliaSparse/SparseArrays.jl#270