TypeScript: TS Server fatal error: Debug Failure. False expression.

Issue Type: Bug

TypeScript Version: 3.8.3 Steps to reproduce crash 1. 2. 3. TS Server Error Stack

Error: Debug Failure. False expression.
    at watchFailedLookupLocationOfResolution (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:101865:22)
    at Array.forEach (<anonymous>)
    at watchFailedLookupLocationOfNonRelativeModuleResolutions (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:101901:25)
    at Map.forEach (<anonymous>)
    at Object.clearPerDirectoryResolutions [as startCachingPerDirectoryResolution] (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:101661:50)
    at ConfiguredProject.Project.updateGraphWorker (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:139785:38)
    at ConfiguredProject.Project.updateGraph (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:139729:42)
    at ConfiguredProject.updateGraph (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:140654:63)
    at updateProjectIfDirty (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:141076:45)
    at ProjectService.assignProjectToOpenedScriptInfo (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:143114:29)
    at /Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:143396:107
    at Object.mapDefined (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:562:30)
    at ProjectService.applyChangesInOpenFiles (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:143396:48)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:144260:46)
    at /Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:146003:88
    at IOSession.Session.executeWithRequestId (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:145994:28)
    at IOSession.Session.executeCommand (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:146003:33)
    at IOSession.Session.onMessage (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:146027:35)
    at Interface.<anonymous> (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js:147342:27)
    at Interface.emit (events.js:203:13)
    at Interface._onLine (readline.js:316:10)
    at Interface._normalWrite (readline.js:461:12)
    at Socket.ondata (readline.js:172:10)
    at Socket.emit (events.js:203:13)
    at addChunk (_stream_readable.js:295:12)
    at readableAddChunk (_stream_readable.js:276:11)
    at Socket.Readable.push (_stream_readable.js:210:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:166:17)

VS Code version: Code - Insiders 1.45.0-insider (d4b8ec9da3bf1061a948fbb1b0d9d3db750cc79f, 2020-05-05T07:13:27.726Z) OS version: Darwin x64 19.4.0

System Info

Item	Value
CPUs	Intel® Core™ i7-9750H CPU @ 2.60GHz (12 x 2600)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	3, 3, 2
Memory (System)	16.00GB (0.31GB free)
Process Argv	-psn_0_1216809
Screen Reader	no
VM	0%

Extensions (17)

Extension	Author (truncated)	Version
better-toml	bun	0.3.2
bracket-pair-colorizer	Coe	1.0.61
vscode-eslint	dba	2.1.5
gitlens	eam	10.2.1
prettier-vscode	esb	4.5.0
gitlab-workflow	fat	2.2.0
file-icons	fil	1.0.23
vscode-mocha-test-adapter	hbe	2.3.0
vscode-test-explorer	hbe	2.18.0
vscode-edit-csv	jan	0.2.7
nbpreviewer	jit	1.2.2
rust-analyzer	mat	0.2.159
vscode-http-client	mkl	0.34.0
sqltools	mtx	0.21.7
tabnine-vscode	Tab	2.8.2
vscodeintellicode	Vis	1.2.6
markdown-all-in-one	yzh	2.8.0

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 23 (8 by maintainers)

Most upvoted comments

I have done further research and it is definitely down to ttypescript. The good news is that it’s shockingly easy to move over to ts-patch if you’re using typescript-transform-paths you’ll find the author is the same and he’s both very qualified and very much active. He’s working on a rearchitected v2 to ts-patch but there’s no need for people who just want to do path alias remapping.

On Thu, Sep 16, 2021 at 6:48 PM Jason Kuhrt @.***> wrote:

I am facing this or similar issue in https://github.com/prisma-labs/kont.

It seems that when I stop using ttsc things are working.

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yankeeinlondon on Sep 17, 2021

Also tsserver log is useful: You can upload logs by following these steps:

Set "typescript.tsserver.log": "verbose"
Restart vscode or vscode insiders
Reproduce the problem
In vscode or vscode insiders, run the TypeScript: Open TS Server log command
This should open a large file called tsserver.log. Please share this file. Additionally you can also share file ti.log created next to it.

sheetalkamat on May 11, 2020

I ran into the same issue and also confirmed it was due to the usage of ttypescript. However, unlike @ksnyde, I was using @zerollup/ts-transform-paths, not typescript-transform-paths.

Switching from ttsc to ts-patch fixed this issue for me. I was able to use ts-patch with @zerollup/ts-transform-paths.

justinbhopper on Dec 15, 2021

That’s a completely different error stack, and I fully expect it to be caused by ttypescript or typescript-transform-paths. If you can reproduce it without using an unsupported patch of our compiler, feel free to open a new issue.

andrewbranch on Sep 8, 2021

Note: i will add one caveat, and that is that I’m using ttsc instead of tsc because ttsc opens up using TS plugin API’s and I have a path alias which need resolving.

yankeeinlondon on Sep 8, 2021

Closing as not actionable without more information

If you see this again with VS Code 1.53+ and TypeScript 4.15+, please let us know

mjbvz on Feb 17, 2021