mongo/jstests/core/nestedarr1.js

// make sure that we don't crash on large nested arrays but correctly do not index them
// SERVER-5127, SERVER-5036

function makeNestArr(depth){
    if(depth == 1){
        return {a : [depth]};
    }
    else{
        return {a : [makeNestArr(depth - 1)] };
    }
}

t = db.arrNestTest;
t.drop();

t.ensureIndex({a:1});

n = 1;
while ( true ) {
    var before = t.count();
    t.insert( { _id : n, a : makeNestArr(n) } );
    var after = t.count();
    if ( before == after )
        break;
    n++;
}

assert( n > 30, "not enough n: " + n );

assert.eq( t.count(), t.find( { _id : { $gt : 0 } } ).hint( { a : 1 } ).itcount() );