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

[rohaanuv]

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\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:2024:20)
    at isNodeModulesOrScopedPackageDirectory (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19068:65)
    at guessDirectorySymlink (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19056:17)
    at Object.discoverProbableSymlinks (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:19044:22)
    at ConfiguredProject.Project.getSymlinkCache (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:153461:61)
    at Object.getSymlinkCache (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:108825:29)
    at Object.host.compilerHost.realpath (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:108884:36)
    at realPath (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:39626:42)
    at Object.resolveTypeReferenceDirective (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:39075:74)
    at c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154817:112
    at Object.map (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:451:29)
    at Function.AutoImportProviderProject.getRootFileNames (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154817:42)
    at Function.AutoImportProviderProject.create (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154846:38)
    at ConfiguredProject.Project.getPackageJsonAutoImportProvider (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154660:77)
    at ConfiguredProject.Project.updateGraph (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154058:26)
    at ConfiguredProject.updateGraph (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:154993:63)
    at ProjectService.createLoadAndUpdateConfiguredProject (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:156743:25)
    at ProjectService.assignProjectToOpenedScriptInfo (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:157684:44)
    at c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:158024:97
    at Object.flatMap (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:515:25)
    at ProjectService.applyChangesInOpenFiles (c:\Users\rohaa\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\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:159079:46)
    at c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160963:88
    at IOSession.Session.executeWithRequestId (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160954:28)
    at IOSession.Session.executeCommand (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160963:33)
    at IOSession.Session.onMessage (c:\Users\rohaa\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\tsserver.js:160989:35)
    at Interface.<anonymous> (c:\Users\rohaa\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) i5-10210U CPU @ 1.60GHz (8 x 2112)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on protected_video_decode: enabled rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	7.85GB (2.87GB free)
Process Argv	C:\Users\rohaa\AppData\Local\Temp\Temp1_ios.zip\IosAppDevProcessSection\IOSAppDevProcessSection.js --crash-reporter-id 6ad1e51b-a68f-4e28-87da-c2be86411f35
Screen Reader	no
VM	0%

Extensions (16)

Extension	Author (truncated)	Version
vscode-database	baj	2.2.3
bracket-pair-colorizer	Coe	1.0.61
es7-react-js-snippets	dsz	3.1.0
prettier-vscode	esb	5.9.2
vscode-styled-components	jpo	1.5.0
dotenv	mik	1.0.1
csharp	ms-	1.23.9
python	ms-	2021.2.636928669
jupyter	ms-	2021.3.619093157
vscode-typescript-tslint-plugin	ms-	1.3.3
material-icon-theme	PKi	4.5.0
LiveServer	rit	5.6.1
markdown-preview-enhanced	shd	0.5.16
vscodeintellicode	Vis	1.2.11
expresssnippet	vla	0.2.4
JavaScriptSnippets	xab	1.8.0

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry244cf:30256637
pythonvsdeb440:30248342
pythonvsded773:30248341
pythonvspyt875:30259475
dockersubset:30270708
vspre833cf:30267465

[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 'indexOf' of undefined (#116344)
• TS Server fatal error: Debug Failure. False expression: (#116447)
• TS Server fatal error: Cannot read property 'lastIndexOf' of undefined (#118335)
• TS Server fatal error: Cannot read property 'lastIndexOf' of undefined (#118429)
• TS Server fatal error: Cannot read property 'lastIndexOf' of undefined (#118580)

[gjsjohnmurray]

Looks like the upstream issue is microsoft/TypeScript#43105 and yesterday's VS Code update to 1.54.2 still has it because it only brings 4.2.3 and the fix isn't expected until 4.3.1 😞