Not all symbols in a declaration merging are exported

[timocov]

Bug report

Input code

// input.ts
import { Foo } from './foo';
const Foo = 2;
export { Foo };

// foo.ts
export interface Foo {}

Expected output

export interface Foo {
}
export declare const Foo = 2;
export {};

Actual output

interface Foo {
}
export declare const Foo = 2;
export {};

Additional context
exportReferencedTypes should be disabled