Removing objects from under a geo $near query causes invalid memory access

t = db.geo_near t.drop();   for (var x = -1; x < 1; x += 1) { for (var y = -1; y < 1; y += 1) { t.insert({geo: [x, y]}) } }   t.ensureIndex({ geo : "2d" })   var cur = t.find({geo: {$near: [0,0], $maxDistance: 3}}).batchSize(2); cur.next(); cur.next(); t.remove({}) cur.next();