[DO NOT MERGE] Throw exception if slot has invalid offset am: 69e347f7 -s...

[DO NOT MERGE] Throw exception if slot has invalid offset am: 69e347f7  -s ours am: 1c732801 am: 78861ad5  -s ours am: 13df27e6 am: a3912b6a am: 0766ba70 am: 46dbe6a7  -s ours am: 567e742d am: 5a16e062 am: 73ceabb9 am: e2aeaa99 am: 52a01720
am: 15cf9d57  -s ours

Change-Id: I383d0e7c4e0d96fc6d316a2e031283b180ce16b9