TypeError: Cannot read property 'languageServiceRefCount' of undefined in 'releaseDocumentWithKey' during 'updateOpen'

[typescript-bot]

This issue comes from crash dumps in telemetry. We've tried to de-duplicate issues on a best-effort basis, comparing the sequence of methods called and the command requested while ignoring line numbers.
TypeScript version prefix: 3.7.5
VSCode version: 1.42.0-insider
Command requested: updateOpen
Hitting sessions: 106
Five line hash: 5c1acdcc73afd5c87d9e9747c290a81d
Stack:

    at releaseDocumentWithKey (tsserver.js:108821:13)
    at releaseDocument (tsserver.js:108816:20)
    at <anonymous> (tsserver.js:130767:45)
    at forEach (tsserver.js:170:30)
    at dispose (tsserver.js:130766:20)
    at Project.close (tsserver.js:134874:38)
    at InferredProject.close (tsserver.js:135690:40)
    at ProjectService.removeProject (tsserver.js:136824:25)
    at ProjectService.cleanupAfterOpeningFile (tsserver.js:138260:30)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:138456:26)
    at _a.<computed> (tsserver.js:139302:46)
    at <anonymous> (tsserver.js:140960:88)
    at Session.executeWithRequestId (tsserver.js:140951:28)
    at Session.executeCommand (tsserver.js:140960:33)
    at Session.onMessage (tsserver.js:140983:35)
    at <anonymous> (tsserver.js:142298:27)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)

[mjbvz]

Also a top hitters for VS Code (including in 3.8 and 3.9-nightlies)

[mjbvz]

@sheetalkamat Assigning you based on conversation at TS sync today. Sorry, no repro yet!

[mjbvz]

@RyanCavanaugh Just making sure you're aware of this issue as well. Still effecting TS 3.8.2 and 3.9

[sheetalkamat]

Looking into this but till now no success on whats happening.. I think we will need tsserver log for this

[DanielRosenwasser]

sounds like we may need to move this out from 3.8.3 then

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.8.3
VSCode version: 1.43.0-insider
Command requested: updateOpen
Hitting sessions: 278
Five line hash: 8ca22102fe20903de1c01d77c5c2f2b5
Stack:

TypeError: Cannot read property 'languageServiceRefCount' of undefined
    at releaseDocumentWithKey (tsserver.js:112241:13)
    at Object.releaseDocument (tsserver.js:112236:20)
    at unknown (tsserver.js:135319:45)
    at Object.forEach (tsserver.js:167:30)
    at Proxy.dispose (tsserver.js:135318:20)
    at suppressed_frame()
    at InferredProject.Project.close (tsserver.js:139542:38)
    at InferredProject.close (tsserver.js:140420:40)
    at ProjectService.removeProject (tsserver.js:141660:25)
    at ProjectService.cleanupAfterOpeningFile (tsserver.js:143206:30)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:143404:26)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:144260:46)
    at unknown (tsserver.js:146003:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:145994:28)
    at IOSession.Session.executeCommand (tsserver.js:146003:33)
    at IOSession.Session.onMessage (tsserver.js:146027:35)
    at Interface.<anonymous> (tsserver.js:147342:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()