Job Failed #416935: cycles of `malloc(): unsorted double linked list corrupted *** Break *** abort`

Job #416935 failed for f0294240:

While running npsim, lots of repeated

malloc(): unsorted double linked list corrupted
 *** Break *** abort

Could be a transient, but seen this several times in last week so it may be triggered by something recent.

assigned to @wdconinc

mentioned in commit 18891dbe