Broken with rollup@2.75.0+

[Mister-Hope]

Results of rollup@2.74.1

interface DateDetail {
    year?: number | undefined;
    month?: number | undefined;
    day?: number | undefined;
    hour?: number | undefined;
    minute?: number | undefined;
    second?: number | undefined;
}
interface DateInfo {
    display: string;
    value: Date | undefined;
    detail: DateDetail;
}
declare const getDate: (date: string | Date | undefined, options?: DateOptions) => DateInfo | null;

Result with 2.75.0 and 2.75.1

interface DateInfo {
    display: string;
    value: Date | undefined;
    detail: DateDetail;
}
declare const getDate: (date: string | Date | undefined, options?: DateOptions) => DateInfo | null;

I do not think any reproduction is needed, you can just write some code with

• type A (referenced by type B)
• type B (used by code actually)

Any type A is lost here

Any idea? Shall it be rollup issue or the plugin needs to rewrite some lines to compatable with 2.75.0+

[Swatinem]

Looks like fallout from rollup/rollup#4510.
Lots of internal testcases are failing, so there is enough to reproduce this.

[Swatinem]

I filed rollup/rollup#4514 upstream since this looks like it is broken there.
Also #211 will construct a bit more code to convince rollup to retain referenced items.

[Swatinem]

This was fixed upstream, and should work again with rollup@2.75.3.