Comment 31 for bug 1832915

New crash that as found is:
#0 0x000002375f1bd2c4 in pick_numa_nodes (pid=<optimized out>, cpus=<optimized out>, mbs=<optimized out>, assume_enough_cpus=<optimized out>) at numad.c:1796
  1791: numad_log(LOG_DEBUG, "Interleaved MBs: %ld\n", ix, p->process_MBs[ix]);
  1792: } else {
  1793: numad_log(LOG_DEBUG, "PROCESS_MBs[%d]: %ld\n", ix, p->process_MBs[ix]);
  1794: }
  1795: }
  1796: if (ID_IS_IN_LIST(ix, p->node_list_p)) {
  1797: proc_avg_node_CPUs_free += node[ix].CPUs_free;
  1798: }
  1799: }
  1800: proc_avg_node_CPUs_free /= NUM_IDS_IN_LIST(p->node_list_p);
  1801: if ((process_has_interleaved_memory) && (keep_interleaved_memory)) {
#1 0x0000000000000000 in ?? ()

That already smells like a different symptom due to the same root cause (sparse node IDs)
Most likely the node[ix] access.