"JS/TS crashed 5 times..." loop in Github Codespaces

[retr0cube]

Describe the bug

Hello,
I've been using Codespaces for a couple of months now, for primarily one SvelteKit project (Part of a monorepo). Things were great until I noticed that this process was looping over and over again:
Initializing /.../tsconfig.json
A couple of seconds later, I get the following error:

The JS/TS language service crashed 5 times in the last 5 Minutes. This may be caused by a plugin contributed by one of these extensions: svelte.svelte-vscode Please try disabling these extensions before filing an issue against VS Code.

Reproduction

I really didn't find any way to reproduce this issue, the only thing that I noticed is that the issue happens when opening .ts files in Svelte projects.

Expected behaviour

For the extension to work properly.

System Info

• OS: Github Codespace instance (4 cores, 16gb ram), Linux
• IDE: VSCode

Which package is the issue about?

Svelte for VS Code extension

Additional Information, eg. Screenshots

TSserver log file:

tsconfig.txt

[retr0cube]

Reading through the log I didn't find anything of importance, additionally I tried deleting the TS cache and opening the codespace in the browser and VScode but to no avail.

[jasonlyu123]

Yeah. I didn't find much information in the log. I don't think there is much we can do to help unless there is a reproduction, or at least an error stack trace. Maybe you can check if the output channel has another error log?

[retr0cube]

Yeah. I didn't find much information in the log. I don't think there is much we can do to help unless there is a reproduction, or at least an error stack trace. Maybe you can check if the output channel has another error log?

Hi thanks for the answer!
How can I check the other output channel?

[jasonlyu123]

You can search for "Output: Show output channels" in the command palette(F1) and choose TypeScript in the next step.

[retr0cube]

Output: Show output channels

Here's the output:

2025-07-15 14:09:31.174 [info] Starting TS Server
2025-07-15 14:09:31.174 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:09:31.174 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:31.174 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-5qyPHh/tsserver.log
2025-07-15 14:09:31.174 [info] <syntax> Forking...
2025-07-15 14:09:31.174 [info] <syntax> Starting...
2025-07-15 14:09:31.174 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:31.174 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-cRgrak/tsserver.log
2025-07-15 14:09:31.174 [info] <semantic> Forking...
2025-07-15 14:09:31.174 [info] <semantic> Starting...
2025-07-15 14:09:42.655 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:09:42.655 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-cRgrak/tsserver.log
2025-07-15 14:09:42.655 [info] Starting TS Server
2025-07-15 14:09:42.655 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:09:42.655 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:42.655 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-cWkNlk/tsserver.log
2025-07-15 14:09:42.655 [info] <syntax> Forking...
2025-07-15 14:09:42.655 [info] <syntax> Starting...
2025-07-15 14:09:42.655 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:42.655 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-t9Rphh/tsserver.log
2025-07-15 14:09:42.655 [info] <semantic> Forking...
2025-07-15 14:09:42.655 [info] <semantic> Starting...
2025-07-15 14:09:50.084 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:09:50.084 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-t9Rphh/tsserver.log
2025-07-15 14:09:50.084 [info] Starting TS Server
2025-07-15 14:09:50.084 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:09:50.084 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:50.084 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-9Ibgkj/tsserver.log
2025-07-15 14:09:50.084 [info] <syntax> Forking...
2025-07-15 14:09:50.084 [info] <syntax> Starting...
2025-07-15 14:09:50.084 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:50.084 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-Gr8YYi/tsserver.log
2025-07-15 14:09:50.084 [info] <semantic> Forking...
2025-07-15 14:09:50.084 [info] <semantic> Starting...
2025-07-15 14:09:59.527 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:09:59.527 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-Gr8YYi/tsserver.log
2025-07-15 14:09:59.527 [info] Starting TS Server
2025-07-15 14:09:59.527 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:09:59.527 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:59.527 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-9hCj0i/tsserver.log
2025-07-15 14:09:59.527 [info] <syntax> Forking...
2025-07-15 14:09:59.527 [info] <syntax> Starting...
2025-07-15 14:09:59.527 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:09:59.527 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-6d26yk/tsserver.log
2025-07-15 14:09:59.527 [info] <semantic> Forking...
2025-07-15 14:09:59.527 [info] <semantic> Starting...
2025-07-15 14:10:06.862 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:10:06.862 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-6d26yk/tsserver.log
2025-07-15 14:10:06.862 [info] Starting TS Server
2025-07-15 14:10:06.862 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:10:06.862 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:10:06.862 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-BTNC3k/tsserver.log
2025-07-15 14:10:06.862 [info] <syntax> Forking...
2025-07-15 14:10:06.862 [info] <syntax> Starting...
2025-07-15 14:10:06.862 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:10:06.862 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-mFffWi/tsserver.log
2025-07-15 14:10:06.862 [info] <semantic> Forking...
2025-07-15 14:10:06.862 [info] <semantic> Starting...
2025-07-15 14:10:14.183 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:10:14.183 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-mFffWi/tsserver.log
2025-07-15 14:10:14.183 [info] Starting TS Server
2025-07-15 14:10:14.183 [info] Using tsserver from: /vscode/bin/linux-x64/2901c5ac6db8a986a5666c3af51ff804d05af0d4/extensions/node_modules/typescript/lib/tsserver.js
2025-07-15 14:10:14.183 [info] <syntax> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:10:14.183 [info] <syntax> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-FMMgjk/tsserver.log
2025-07-15 14:10:14.184 [info] <syntax> Forking...
2025-07-15 14:10:14.184 [info] <syntax> Starting...
2025-07-15 14:10:14.184 [info] <semantic> Falling back to legacy node.js based file watching because of user settings.
2025-07-15 14:10:14.184 [info] <semantic> Log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-lNxavk/tsserver.log
2025-07-15 14:10:14.184 [info] <semantic> Forking...
2025-07-15 14:10:14.184 [info] <semantic> Starting...
2025-07-15 14:10:21.618 [error] TSServer exited. Code: null. Signal: SIGABRT
2025-07-15 14:10:21.618 [info] TSServer log file: /home/codespace/.vscode-remote/data/logs/20250715T140924/exthost1/vscode.typescript-language-features/tsserver-log-lNxavk/tsserver.log

[retr0cube]

I tried VSCode without extensions and the server runs normally, but when reloading with extensions the issue reappears, The only TS related extension is the Svelte Extension.

[jasonlyu123]

I suspect it might be out of memory. However, this might not always be a problem with the implementation of typescript-svelte-plugin. It might be simply because the plugin loads Svelte files, so the number of files increased, or the problematic types only exist in a Svelte file.

Does the Svelte language server also crash when you open a Svelte file? If so, you might need to check if it's caused by one of the libraries you're using. Also, can you check if increasing the memory limit helps? You can configure that with the typescript.tsserver.maxTsServerMemory config.

[retr0cube]

@jasonlyu123

typescript.tsserver.maxTsServerMemory

For my Codespace instance it is 3GB

Does the Svelte language server also crash when you open a Svelte file?

How can I know?

Also, I noticed the tsconfig.json in the Svelte project has this error:

Can it be possibly causing the issue?

UPDATE:
This seems to fix the issue cypress-io/cypress#27731 (comment)

[jasonlyu123]

Does the Svelte language server also crash when you open a Svelte file?

If it does, it should have a similar notification telling you that it crashed 5 times

Also, I noticed the tsconfig.json in the Svelte project has this error:

Your tsconfig.json might be wrong. It should have the module: esnext option. Depending on how old your project is, it should either be in the tsconfig.json or in .svelte-kit/tsconfig.json, and there should be an "extends": "./.svelte-kit/tsconfig.json" in your tsconfig.json. You should create a new SvelteKit project and copy over the tsconfig.json.

For my Codespace instance it is 3GB

Yeah, that is the default. Can you check if increasing it makes any difference?

[retr0cube]

@jasonlyu123 About the config file, here's what worked for me (based on the previous answer and running the project):

{
	"extends": "./.svelte-kit/tsconfig.json",
	"compilerOptions": {
		"allowJs": true,
		"checkJs": true,
		"esModuleInterop": true,
		"forceConsistentCasingInFileNames": true,
		"resolveJsonModule": true,
		"skipLibCheck": true,
		"sourceMap": true,
		"strict": true,
		"moduleResolution": "bundler"
	},
    "ts-node": {
        "compilerOptions": {
            "module": "ESNext",
            "moduleResolution": "Node"
        }
    }
	// Path aliases are handled by https://kit.svelte.dev/docs/configuration#alias
	// except $lib which is handled by https://kit.svelte.dev/docs/configuration#files
	//
	// If you want to overwrite includes/excludes, make sure to copy over the relevant includes/excludes
	// from the referenced tsconfig.json - TypeScript does not merge them in
}