Just documenting here a very annoying error (segfault) I found in github actions. You can find the error here: https://github.com/gridap/GridapP4est.jl/actions/runs/7113091380/job/19364359249 The error disappears when using either MPI.jl v0.20.18, or with MPI.jl v0.20.19 and we upgrade to Ubuntu 22.04 (Open MPI v4.1.2)