When trying to do an operation on a database without being authenticated when mongod is started with --auth flag, mongod crashes.

Example:

1. mongo
   MongoDB shell version: 2.0.2
   connecting to: test
   > db.system.users.find()
   Mon Jan 16 19:20:36 DBClientCursor::init call() failed
   Mon Jan 16 19:20:36 query failed : test.system.users {} to: 127.0.0.1
   Error: error doing query: failed
   Mon Jan 16 19:20:36 trying reconnect to 127.0.0.1
   Mon Jan 16 19:20:36 reconnect 127.0.0.1 failed couldn't connect to server 127.0.0.1
   > exit
   bye
   mongo# /usr/local/etc/rc.d/mongod restart
   mongod not running?
   Starting mongod.
   forked process: 7424
   all output going to: /var/db/mongodb/mongod.log
   mongo# mongo
   MongoDB shell version: 2.0.2
   connecting to: test
   > db.auth('test','secret')
   1
   > db.system.users.find() { "_id" : ObjectId("4f10853a4292b966a9f08ef9"), "user" : "test", "readOnly" : false, "pwd" : "d42ffb4208a6ee4ef351cea495d01631" } { "_id" : ObjectId("4f1087f34292b966a9f08efa"), "user" : "patxi", "readOnly" : false, "pwd" : "3a43f2e323947ced066d82d4433281f7" }

Attached is a relevant part of mongod.log