Solver tests broken in dev-3.2.0 on CPU

[s-mayani]

When running the Gaussian convergence test with Hockney in the dev-3.2.0 branch (most recent commit a8bc1cb), it does not seem to work in parallel on CPU. The job stalls when using 2 MPI ranks, and produces a segmentation fault when using 3 MPI ranks. When checking out previous commits, it seems that the behaviour starts from commit 7988e59 (e_dim_tag got replaced).
However, on GPU the test runs fine both with 2 and 3 GPUs.

I am attaching the error log for a run of the executable /test/solver/TestGaussian_convergence with arguments HOCKNEY and DOUBLE on 3 MPI ranks on CPU, which shows the segmentation fault.
error_log.txt