Reconfiguring a mongodb 3.2 replica set with protocolVersion = 0 crashes the primary on Mac OS X. This does not happen on linux. This does not happen with a 1-member replica set. It does happen with a 3-member replica set.
Logs for all 3 members attached.
This was with 3.2.0-rc1-pre- commit dbbc9a2e3d8c4d7fe1748fa980ba7d01b9489dbe