In v6.5.0 mongoose.disconnect() causing Cannot read properties of undefined (reading 'fullDocument')

[vnugent]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

6.5

Node.js version

16.15

MongoDB server version

mongo:5 from official Docker repo

Description

I have a unit test that was working fine in v6.4.7. In 6.5.0 change stream throws an exception when mongoose.disconnect() is called at the of the test.

data is undefined here
https://github.com/Automattic/mongoose/blob/6.5/lib/cursor/ChangeStream.js#L57

Home/git/openbeta/openbeta-graphql/node_modules/mongodb/lib/utils.js:419
                    throw error;
                    ^

TypeError: Cannot read properties of undefined (reading 'fullDocument')
    at ChangeStream.<anonymous> (/Home/git/openbeta/openbeta-graphql/node_modules/mongoose/lib/cursor/ChangeStream.js:57:22)
    at ChangeStream.emit (node:events:539:35)
    at ChangeStreamCursor.<anonymous> (/Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/change_stream.ts:817:46)
    at ChangeStreamCursor.emit (node:events:527:28)
    at /Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/cursor/abstract_cursor.ts:823:18
    at /Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/utils.ts:535:5
    at completeEndSession (/Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/sessions.ts:283:9)
    at /Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/sessions.ts:297:7
    at maybePromise (/Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/utils.ts:520:3)
    at ClientSession.endSession (/Home/git/openbeta/openbeta-graphql/node_modules/mongodb/src/sessions.ts:258:24)
e

Steps to Reproduce

Important: Test requires a replica set.

await mongoose.connect(
      `mongodb://${user}:${pass}@${server}/testdb?authSource=admin&readPreference=primary&ssl=false&replicaSet=${rsName}`,
      { autoIndex: false }
    )

const changeStream = mongoose.connection.watch(pipeline, { fullDocument: 'updateLookup' })
const stream = changeStream.on('change', change => {
    console.log(change)
  })

await stream.close() // not helping
await mongoose.disconnect() 

Expected Behavior

No undefined exception like in v6.4.7

[ramos-ph]

Hey, I've tested a little bit and turns out that data was also undefined in previous working version, so I made a few changes in ChangeStream.

I've created this branch to try and solve the problem, let me know if it is from any help!

https://github.com/ramos-ph/mongoose/tree/fix/12169