type PositiveTime = f32{t | t > 0.0}

pure fn simulate(dt: PositiveTime) -> f32:
    // CRASH: We are subtracting a value from a constrained positive type, 
    // which could result in a negative number, violating the return type if we expected a PositiveTime.
    // For this test, let's just pass an invalid type.
    return dt
    
pure fn main() -> f32:
    // CRASH: Trying to pass a negative literal to a PositiveTime constraint!
    let invalid_time = -5.0
    let result = simulate(invalid_time)
    return result