am c653ae77: am e8879d67: Merge "Add null check in MarkSweepMarkObjectSlowPath."
am c653ae77: am e8879d67: Merge "Add null check in MarkSweepMarkObjectSlowPath."

* commit 'c653ae777278dd31332d981cac157c2c31ffc96f':
  Add null check in MarkSweepMarkObjectSlowPath.

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