typedef tag is able to resolve type variables declared in same jsdoc comment

[sandersn]

Typedef tags are supposed to be visible in the parent scope of the jsdoc comment they are attached to. That also means that they should not be able to see things in the same jsdoc comment that are supposed to be visible in the child scope, such as @template.

/**
 * @template T
 * @typedef {T} N
 */
class C {
    /** @param {N} n */
    m(n) {
        n
    }
}
/** @type {N} */
var y;

Expected behavior:
n: T and y: unknown with an error on @type {N} "Cannot resolve name 'N'."

Actual behavior:
n: T and y: T and no error.

[sandersn]

Fixed in #23947