Go-to-type definition does not work on aliases to tuple types

export type SpanMapping = [
  virtualStart: number,
  virtualLength: number,
  originalStart: number,
  originalLength: number,
  kind: SpanMapKind,
  features?: SpanMapFeature,
];
export let mapping: SpanMapping;
mapping/**/;

If you request go to type definition at /**/, you will get no result.

The same is not true if SpanMapping is aliased to an anonymous object type.

首先复现提供的 TypeScript 示例，并在标记的位置请求 go-to-type-definition。比较元组别名与匿名对象别名的结果。当元组别名返回与对象别名类似的类型定义结果时，即视为完成。