@oscardssmith are you maintainer here too?

reluctantly, yes.

I took a different approach now, essentially just throwing away the second index when indexing into a PtrVector. This doesn't break the other tests. Now all tests passing on main also pass with this PR locally.

@oscardssmith could you please approve the CI?

These CI fails look unrelated to my changes. I had to comment out this test to even make the tests run locally even on main.

Now all errors are unrelated to my changes and the 1.6 version passes.

@oscardssmith could you please approve CI here? Now with the CI fix merged.

@oscardssmith Ready for review. The segfaults are unrelated and also happening in the latest CI run on main. The tests I added are wrapped inside GC.@preserve.

bump

@ranocha do you maybe have permissions to review/merge this? It might also cause problems with Trixi.jl.

Merging now since no one seems to care enough to review this.