TS Server fatal error: Cannot read property 'flags' of undefined

[RaghunathSenthilnathan]

Issue Type: Bug

❗️❗️❗️ Please fill in the sections below to help us diagnose the issue ❗️❗️❗️

TypeScript Version: 4.5.4

Steps to reproduce crash
1.
2.
3.

TS Server Log
❗️Server logging disabled. To help us fix crashes like this, please enable logging by setting:

"typescript.tsserver.log": "verbose"

After enabling this setting, future crash reports will include the server log.

TS Server Error Stack
Server: semantic

TypeError: Cannot read property 'flags' of undefined
    at getPropertyOfObjectType (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:57011:22)
    at getPropertyOfType (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:57671:24)
    at resolveESModuleSymbol (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49817:54)
    at getTargetOfNamespaceImport (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49002:28)
    at getTargetOfAliasDeclaration (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49236:28)
    at resolveAlias (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49281:30)
    at getSymbol (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47838:38)
    at resolveNameHelper (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:48131:34)
    at resolveName (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:48114:20)
    at resolveEntityName (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49453:42)
    at getTargetOfExportSpecifier (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49193:17)
    at getTargetOfAliasDeclaration (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49243:28)
    at resolveAlias (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49281:30)
    at resolveSymbol (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:49271:67)
    at mergeSymbol (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47624:42)
    at c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47739:47
    at Map.forEach (<anonymous>)
    at mergeSymbolTable (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47737:20)
    at mergeSymbol (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47648:21)
    at c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47739:47
    at Map.forEach (<anonymous>)
    at mergeSymbolTable (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47737:20)
    at initializeTypeChecker (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:85010:21)
    at Object.createTypeChecker (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:47395:9)
    at Object.getTypeChecker (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:114404:79)
    at synchronizeHostData (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:159898:21)
    at Object.getProgram (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:160019:13)
    at ConfiguredProject.Project.updateGraphWorker (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:165033:53)
    at ConfiguredProject.Project.updateGraph (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:164962:42)
    at ConfiguredProject.updateGraph (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:165955:63)
    at ProjectService.createLoadAndUpdateConfiguredProject (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:167679:25)
    at ProjectService.assignProjectToOpenedScriptInfo (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:168762:44)
    at c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:169102:97
    at Object.flatMap (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:522:25)
    at ProjectService.applyChangesInOpenFiles (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:169102:41)
    at Session.handlers.ts.Map.ts.getEntries._a.<computed> (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:170260:46)
    at c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:172193:88
    at IOSession.Session.executeWithRequestId (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:172184:28)
    at IOSession.Session.executeCommand (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:172193:33)
    at IOSession.Session.onMessage (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:172219:35)
    at Interface.<anonymous> (c:\Users\63700\Documents\cognito-integration\node_modules\typescript\lib\tsserver.js:174824:31)
    at Interface.emit (events.js:315:20)
    at Interface._onLine (readline.js:337:10)
    at Interface._normalWrite (readline.js:482:12)
    at Socket.ondata (readline.js:194:10)
    at Socket.emit (events.js:315:20)
    at addChunk (internal/streams/readable.js:309:12)
    at readableAddChunk (internal/streams/readable.js:284:9)
    at Socket.Readable.push (internal/streams/readable.js:223:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:188:23)

VS Code version: Code 1.63.2 (899d46d, 2021-12-15T09:40:02.816Z)
OS version: Windows_NT x64 10.0.19044
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz (8 x 1800)
GPU Status	2d_canvas: unavailable_software gpu_compositing: disabled_software multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: disabled_off rasterization: disabled_software skia_renderer: enabled_on video_decode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software
Load (avg)	undefined
Memory (System)	7.85GB (1.95GB free)
Process Argv	--crash-reporter-id dab14a98-0bfd-4f7f-9b9f-5f3ce42bf45b
Screen Reader	no
VM	0%

Extensions (18)

Extension	Author (truncated)	Version
npm-intellisense	chr	1.4.0
path-intellisense	chr	2.6.0
prettier-vscode	esb	9.0.0
ts-extension-pack	loi	0.3.0
vscode-language-babel	mgm	0.0.35
vscode-react-snippet	Nic	0.0.6
tsimporter	pmn	2.0.1
java	red	1.2.0
vscode-javascript-booster	sbu	14.0.1
sonarlint-vscode	Son	3.1.0
move-ts	str	1.12.0
vscodeintellicode	Vis	1.2.15
vscode-java-debug	vsc	0.37.0
vscode-java-dependency	vsc	0.18.8
vscode-java-pack	vsc	0.20.0
vscode-java-test	vsc	0.33.0
vscode-maven	vsc	0.34.1
beauty	yhp	0.0.2

A/B Experiments

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pythontb:30283811
pythonptprofiler:30281270
vshan820:30294714
vstes263:30335439
vscorecescf:30384386
pythondataviewer:30285071
vscod805:30301674
pythonvspyt200:30340761
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593:30376534
pythonvs932:30410667
vscop804:30404766
vscop940:30404999
vsrem710:30405998
py55gd98:30411514
vscexrecpromp3t2:30407763

[aaliakseyenka]

hey @mjbvz, any thoughts on that? I have same issue and seems tried everything to fix it locally, but with no success

[IllusionMH]

/duplicate of microsoft/TypeScript#47179

TS team needs a way to reproduce this issue. Please provide code that can help to reproduce this crash in issue linked above.

[vscode-triage-bot]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for existing issues here. See also our issue reporting guidelines.

Happy Coding!