[pnpm] The inferred type of 'xxx' cannot be named without a reference to '.pnpm/xxx'

[aramissennyeydd]

related to https://github.com/microsoft/typescript-go/issues/1034 (using 7.0.0-dev.20251204.1)

Steps to reproduce

https://github.com/aramissennyeydd/typescript-go-pnpm-error

Write a function whose return value is a type from a package installed with PNPM. In the example above that's @testing-library/react.

Behavior with [email protected]

No errors.

Behavior with tsgo

> [email protected] tsgo /Users/aramis.sennyey/Projects/tsgo-errors/packages/test
> tsgo

test-utils.tsx:4:7 - error TS2742: The inferred type of 'customRender' cannot be named without a reference to '.pnpm/@[email protected]/node_modules/@testing-library/dom/types/queries'. This is likely not portable. A type annotation is necessary.

4 const customRender = (
        ~~~~~~~~~~~~


Found 1 error in test-utils.tsx:4

[samdcoding]

+1 we are seeing quite a few of these errors as well

[brokenmass]

this is related to #2234 . in fact if you change:

to

const customRender: (
  ui: React.ReactElement<any>,
  options?: RenderOptions & { customLayerManager?: React.FC<any> }
) => RenderResult = (
  ui,
  options
) =>
  render(ui, {
    wrapper: () => <></>,
    ...options,
  }) as RenderResult

or

function customRender (
  ui: React.ReactElement<any>,
  options?: RenderOptions & { customLayerManager?: React.FC<any> }
): RenderResult {
  return render(ui, {
    wrapper: () => <></>,
    ...options,
  }) as RenderResult
}

the error disappears.

the inferred, broken type for that function is

const customRender: (ui: React.ReactElement<any, string | React.JSXElementConstructor<any>>, options?: (RenderOptions<typeof import("/some/path/to/node_modules/.pnpm/@[email protected]/node_modules/@testing-library/dom/types/queries"), HTMLElement, HTMLElement> & { ...; }) | undefined) => RenderResult

instead of the expected:

import { RenderResult, RenderOptions } from '@testing-library/react';
declare const customRender: (ui: React.ReactElement<any>, options?: RenderOptions & {
    customLayerManager?: React.FC<any>;
}) => RenderResult;

[rubnogueira]

#1034 solved some of my issues, but like the main post, I still have one specific dependency that has the same error.