TS2339: Property does not exist on type

[liuxingbaoyu]

Steps to reproduce

1.git clone
2.yarn
3.yarn tsgo -b
babel/babel#17411

Sorry. I tried to do a minimal reproduction, but it failed.
It works fine when I access the property within the same file, but it throws an error in other packages.

Behavior with typescript@5.9

no errors

Behavior with tsgo

packages/babel-core/src/transformation/index.ts:112:30 - error TS2339: Property 'visitors' does not exist on type '{ <S>(parent: Node, opts: TraverseOptions<S>, scope: Scope, state: S, parentPath?: NodePath_Final, visitSelf?: boolean): void; (parent: Node, opts: TraverseOptions<...>, scope?: Scope, state?: any, parentPath?: NodePath_Final, visitSelf?: boolean): void; }'.

112     const visitor = traverse.visitors.merge(

[ahejlsberg]

Looks to me like this is a declaration file emit issue. The babel-traverse package adds some expando properties to its default export object, but those properties are not reflected in the .d.ts file generated for the package.

https://github.com/babel/babel/blob/a6b58631fb313efd62524c5f9501cc37ecb408f1/packages/babel-traverse/src/index.ts#L97