Cannot read property 'exports' of undefinedTypeError: Cannot read property 'exports' of undefined

[mjbvz]

From microsoft/vscode#85021

TypeScript Version: 3.7.2

Search Terms:

• TS Server
• updateOpen
• applyChangesInOpenFiles

Bug
A user is reporting seeing this error from the TS server during the updateOpen call:

Error: <semantic> TypeScript Server Error (3.7.2)Cannot read property 'exports' of undefinedTypeError: Cannot read property 'exports' of undefined
    at declareModuleMember (tsserver.js:29333:63)
    at delayedBindJSDocTypedefTag (tsserver.js:30680:29)
    at bindSourceFile (tsserver.js:29049:17)
    at Object.bindSourceFile (tsserver.js:28983:9)
    at initializeTypeChecker (tsserver.js:64348:20)
    at Object.createTypeChecker (tsserver.js:33602:9)
    at Object.getTypeChecker (tsserver.js:95574:79)
    at synchronizeHostData (tsserver.js:130606:21)
    at Object.getProgram (tsserver.js:130688:13)
    at InferredProject.Project.updateGraphWorker (tsserver.js:135039:53)
    at InferredProject.Project.updateGraph (tsserver.js:134982:42)
    at ProjectService.assignOrphanScriptInfoToInferredProject (tsserver.js:136778:25)
    at ProjectService.assignProjectToOpenedScriptInfo (tsserver.js:138156:26)
    at tsserver.js:138358:107
    at Object.mapDefined (tsserver.js:565:30)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:138358:48)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139212:46)
    at tsserver.js:140870:88    at IOSession.Session.executeWithRequestId (tsserver.js:140861:28)
    at IOSession.Session.executeCommand (tsserver.js:140870:33)
    at IOSession.Session.onMessage (tsserver.js:140893:35)
    at Interface.<anonymous> (tsserver.js:142208:27)
    at Interface.emit (events.js:200:13)
    at Interface._onLine (readline.js:314:10)
    at Interface._normalWrite (readline.js:459:12)
    at Socket.ondata (readline.js:170:10)
    at Socket.emit (events.js:200:13)
    at addChunk (_stream_readable.js:294:12)
    at readableAddChunk (_stream_readable.js:275:11)
    at Socket.Readable.push (_stream_readable.js:210:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:166:17)
(at /Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:808:521)

[mjbvz]

@Mikrovolnovka Can you share your project or the file that seems to trigger this?

[Mikrovolnovka]

@mjbvz tried to figure out what's causing it but still no luck.
Can't figure out the cause.
Sorry, I can't share the project as it's private and NDA.
Looks like it becomes broken when some local import is not properly made...
Not sure if it should break the TS Server itself...

[mjbvz]

Can you reduce the problem it to a minimal example?

[RyanCavanaugh]

We won't be able to make useful progress here without a repro. Please log a new issue if you're able to share a setup that can reproduce the problem. Thanks!

[RyanCavanaugh]

Taking up at #36983