am e266ba99: Merge "Do not visit null object from transaction logs."
am e266ba99: Merge "Do not visit null object from transaction logs."

* commit 'e266ba9935bd12d685d83f73cd8d759e46c3014d':
  Do not visit null object from transaction logs.

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst