b.l.drop();
db.f.drop();
assert.commandWorked(db.l.insert([{a: [1]}, {a: {"00": 1}}]));
assert.commandWorked(db.f.insert({b: 1}));

const pipeline1 = [
    {$lookup: {from: "f", localField: "a.00", foreignField: "b", as: "docs"}}
];
const pipeline2 = [
    {$_internalInhibitOptimization: {}},
    {$lookup: {from: "f", localField: "a.00", foreignField: "b", as: "docs"}}
];

// Uses SBE.
jsTestLog(db.l.aggregate(pipeline1).toArray()); // Only {a: {"00": 1}} matches {b: 1}
// Uses document source $lookup.
jsTestLog(db.l.aggregate(pipeline2).toArray()); // Both local documents match {b: 1}