"Inferred type cannot be named" error caused by adding `paths` to tsconfig

[haines]

🔎 Search Terms

"inferred type cannot be named", "paths"

🕗 Version & Regression Information

• This changed in PR Add auto-import for the package.json imports field #55015

⏯ Playground Link

https://github.com/haines/typescript-paths-inferred-type-cannot-be-named

💻 Code

Please see the linked repo (sorry, I couldn't reduce it any further).

🙁 Actual behavior

In a multiproject build where app depends on lib, setting paths in lib's tsconfig breaks app's build with

error TS2742: The inferred type of '...' cannot be named without a reference to '...'. This is likely not portable. A type annotation is necessary.

🙂 Expected behavior

Adding paths shouldn't break the dependent project.

Additional information about the issue

Judging by the PR that I was able to bisect to, this seems like it could a bad interaction between paths in tsconfig.json and exports in package.json.