@template tag is not visible in class body

[DanielRosenwasser]

Found playing with https://github.com/lukeed/tmp-cache

// @ts-check

/**
 * @template {T}
 */
class Foo {
    /**
     * 
     * @param {T} x 
     */
    foo(x) {	
    }
}

This will give the following error on T in the @param tag.

Cannot find name 'T'.

[sandersn]

@template just didn't work at all for classes. The fix is up at #23511.