Typescript eats Google Closure type cast comment

[scf37]

TypeScript Version: 2.4.20

Code

function f() {
    return /* @type {number} */ 42;
}

Expected behavior:
Should be compiled to

function f() {
    return /* @type {number} */ 42;
}

Actual behavior:
Compiled to

function f() {
    return 42;
}