Pattern for extracting `PanicInfo` during `catch_unwind`

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I am also trying to get the PanicInfo from a panic.

As you can see, oddly, downcasting a panic to a PanicInfo is not possible (why?) and downcasting to a &str returns the payload but not the location.

use std::panic;

fn main() {
    let p = panic::catch_unwind(|| panic!("A wild panic appeared!"));
    let err = p.unwrap_err();
    println!("{:#?}", err.downcast_ref::<panic::PanicInfo>()); // None
    println!("{:#?}", err.downcast_ref::<&str>()); // Some("A wild panic appeared!")
}

There Is a away to smuggle a backtrace into the panic, but if my program is multithreaded, i'm afraid this approach might become a little clusmy to program?

Does anyone know otherwise how to extract the PanicInfo from a panic?