From: dparsons@debian.org   
      
   Source: fenics-dolfinx   
   Followup-For: Bug #1127800   
   X-Debbugs-Cc: 1127672@bugs.debian.org   
      
   I'm confident now that Bugs #1127672 and #1127800 are triggered by the   
   same underlying issue.   
      
   I could clear out problems importing dolfinx on my local machine by   
   clearing the fenics cache   
     rm -r ~/.cache/fenics/   
      
   After that I can reproduce issues with the same 5 tests found failing   
   on the 32-bit arches (with mpich) on my local machine (amd64 with   
   openmpi).   
      
   The difference is that serial tests (including mpirun -n 1) pass with   
   openmpi where they fail with mpich (#1127672)   
      
   The other difference is that nanobind with mpich triggers the   
   "incompatible function arguments" error reported in the 5 tests in   
   #1127672,   
   while with multiprocess openmpi (mpirun -n 2) the first test   
   (test_read_write_mixed_topology in test_vtkhdf.py) times out   
   (#1127800), so debci doesn't get to see the problem with the other 4   
   tests.   
      
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