func test1() {
    do {
        try print("foo") // ⚠️ No calls to throwing functions occur within 'try' expression
    } catch {            // ⚠️ 'catch' block is unreachable because no errors are thrown in 'do' block
        fatalError()
    }
}

func test2() throws {
    try print("foo") // ⚠️ No calls to throwing functions occur within 'try' expression
}

try test1() // ⚠️ No calls to throwing functions occur within 'try' expression

test2() // ⛔️ Call can throw but is not marked with 'try'