TypeScript Server Error (3.7.2) Cannot read property 'symbol' of undefined

[josheplibra]

• VSCode Version: 1.14.0, 1.39.1
• OS Version: Windows 10 Pro 1903
• TypeScript Version: 3.7.2

Steps to Reproduce:

1. Sometime when I use autocomplete by "Ctrl + Space", the "TypeScript Server Error (3.7.2)
   Cannot read property 'symbol' of undefined" error occurred. After that Typescript autocomplete doesn't work anymore until I restart TS server.

I don't know this error is vscode error or typescript error. So please check. Sorry if I post wrong place.
Thank you!

ERR TypeScript Server Error (3.7.2)
Cannot read property 'symbol' of undefined
TypeError: Cannot read property 'symbol' of undefined
at tsserver.js:106112:69
at Object.forEach (tsserver.js:170:30)
at Object.get (tsserver.js:106105:24)
at getSymbolsFromOtherSourceFileExports (tsserver.js:107235:79)
at getGlobalCompletions (tsserver.js:107064:49)
at tryGetGlobalSymbols (tsserver.js:106976:25)
at getCompletionData (tsserver.js:106756:17)
at Object.getCompletionsAtPosition (tsserver.js:106138:34)
at Object.getCompletionsAtPosition (tsserver.js:130738:35)
at IOSession.Session.getCompletions (tsserver.js:140355:64)
at Session.handlers.ts.createMapFromTemplate._a. (tsserver.js:139335:61)
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. (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): Error: TypeScript Server Error (3.7.2)
Cannot read property 'symbol' of undefined
TypeError: Cannot read property 'symbol' of undefined
at tsserver.js:106112:69
at Object.forEach (tsserver.js:170:30)
at Object.get (tsserver.js:106105:24)
at getSymbolsFromOtherSourceFileExports (tsserver.js:107235:79)
at getGlobalCompletions (tsserver.js:107064:49)
at tryGetGlobalSymbols (tsserver.js:106976:25)
at getCompletionData (tsserver.js:106756:17)
at Object.getCompletionsAtPosition (tsserver.js:106138:34)
at Object.getCompletionsAtPosition (tsserver.js:130738:35)
at IOSession.Session.getCompletions (tsserver.js:140355:64)
at Session.handlers.ts.createMapFromTemplate._a. (tsserver.js:139335:61)
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. (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 Function.create (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:63732)
at h.dispatchResponse (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:56670)
at h.dispatchMessage (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:55568)
at c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:55044
at l.fire (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:47:207)
at t.Reader.onLengthData (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:61946)
at Socket. (c:\Users\Tam\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\typescript-language-features\dist\extension.js:53:61594)
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)

[josheplibra]

At line tsserver.js:106112:69: suggestion.symbol.declarations[0].symbol
suggestion.symbol.declarations[0] is undefined so get symbol throw error
I tried check undefined before get symbol and it work well
Should I report to Typescript?

[josheplibra]

microsoft/TypeScript#35036 (comment)