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

[Bishbishy]

Issue Type: Bug

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

TypeScript Version: 4.2.3

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 'lastIndexOf' of undefined
    at Object.startsWith (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:2024:20)
    at isNodeModulesOrScopedPackageDirectory (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19068:65)
    at guessDirectorySymlink (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19056:17)
    at Object.discoverProbableSymlinks (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19044:22)
    at ConfiguredProject.Project.getSymlinkCache (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:153461:61)
    at Object.getSymlinkCache (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:108825:29)
    at Object.host.compilerHost.realpath (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:108884:36)
    at realPath (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:39626:42)
    at Object.resolveTypeReferenceDirective (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:39075:74)
    at c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154817:112
    at Object.map (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:451:29)
    at Function.AutoImportProviderProject.getRootFileNames (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154817:42)
    at Function.AutoImportProviderProject.create (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154846:38)
    at ConfiguredProject.Project.getPackageJsonAutoImportProvider (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154660:77)
    at ConfiguredProject.Project.updateGraph (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154058:26)
    at ConfiguredProject.updateGraph (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154993:63)
    at ProjectService.createLoadAndUpdateConfiguredProject (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:156743:25)
    at ProjectService.assignProjectToOpenedScriptInfo (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:157684:44)
    at c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:158024:97
    at Object.flatMap (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:515:25)
    at ProjectService.applyChangesInOpenFiles (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:158024:41)
    at Session.handlers.ts.Map.ts.getEntries._a.<computed> (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:159079:46)
    at c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160963:88
    at IOSession.Session.executeWithRequestId (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160954:28)
    at IOSession.Session.executeCommand (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160963:33)
    at IOSession.Session.onMessage (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160989:35)
    at Interface.<anonymous> (c:\Users\elbis\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:163650:31)
    at Interface.emit (events.js:315:20)
    at Interface._onLine (readline.js:329:10)
    at Interface._normalWrite (readline.js:474:12)
    at Socket.ondata (readline.js:186:10)
    at Socket.emit (events.js:315:20)
    at addChunk (_stream_readable.js:295:12)
    at readableAddChunk (_stream_readable.js:271:9)
    at Socket.Readable.push (_stream_readable.js:212:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:186:23)

VS Code version: Code 1.54.2 (fd6f3bc, 2021-03-11T00:56:19.848Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (8 x 2394)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on protected_video_decode: unavailable_off rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	11.92GB (4.57GB free)
Process Argv	. --crash-reporter-id 08605df1-9b9f-49d9-a709-1145cbc64b10
Screen Reader	no
VM	67%

Extensions (10)

Extension	Author (truncated)	Version
prettier-vscode	esb	6.2.0
code-runner	for	0.11.3
Python-autopep8	him	1.0.2
Angular2	joh	11.0.0
python	ms-	2021.2.636928669
jupyter	ms-	2021.3.619093157
remote-wsl	ms-	0.54.3
nativescript	Tel	0.11.0
material-icon-theme	PKi	4.5.0
vscode-icons	vsc	11.1.0

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383cf:30185419
pythonvspyt700cf:30270857
vspor879:30202332
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vspor363:30204092
vstry244:30256636
pythonvsdeb440:30248342
pythonvsded773:30248341
pythonvspyt875:30259475
dockersubset:30270708
pythontbcf:30265426
vspre833cf:30267465
vsdfh931:30275552

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• TS Server fatal error: Cannot read property 'lastIndexOf' of undefined (#118552)

[mjbvz]

Duplicate of microsoft/TypeScript#43256