Maximum call stack size exceeded when ``fallthroughAttributes: true``

[ferferga]

Vue - Official extension or vue-tsc version

2.1.2

VSCode version

1.92.2

Vue version

3.4.37

TypeScript version

5.5.4

System Info

No response

Steps to reproduce

• Clone the repo: git clone -b fallthrough-attrs-reproduction https://github.com/jellyfin/jellyfin-vue
• Change to the appropiate workspace and install dependencies: cd frontend && npm ci
• Run typecheck: npm run typecheck

What is expected?

Type checking passes successfully and fallthrough attributes are properly inferred.

What is actually happening?

The following stacktrace is printed:

/workspaces/jellyfin-vue/node_modules/vue-tsc/index.js:45
            throw err;
            ^

RangeError: Maximum call stack size exceeded
    at getObjectTypeInstantiation (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61411:38)
    at instantiateTypeWorker (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61670:16)
    at instantiateTypeWithAlias (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61650:20)
    at instantiateType (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61628:29)
    at getMappedType (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61307:67)
    at /workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61433:56
    at map (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:199:19)
    at getObjectTypeInstantiation (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61433:29)
    at instantiateTypeWorker (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61670:16)
    at instantiateTypeWithAlias (/workspaces/jellyfin-vue/node_modules/typescript/lib/tsc.js:61650:20)

Link to minimal reproduction

https://github.com/jellyfin/jellyfin-vue

Any additional comments?

• Disabling fallthroughAttributes completes the typechecking (with type errors though) successfully.

[ferferga]

@johnsoncodehk Thank you very much for the quick fix! Glad that the reproduction was useful (I was worried that it was not minimal at all, but couldn't reproduce it in isolation).

This was something I was really looking forward to, thank you very much!