Throw in catch causes type narrowing in finally block  #34797

function f() {
    let a: number | null = null;
    try {
        a = 123;
        return a;
    }
    catch (e) {
        throw e;  // remove line and error disappears
    }
    finally {
        console.log(a); // works fine, logs 123
        if (a != null && a.toFixed(0) == "123") { 
             // Property 'toFixed' does not exist on type 'never'.(2339)
        }
    }
}

f();