bluss/debugit

DebugIt: Use specialization so you can debug-print a value without explicit (and viral) Debug trait bound. (Not really maintained. Uses specialization so it may break)

debugit's Issues

I think you should point out the presence of soundness issues in the documentation.

E.g.

use std::fmt;

fn foo<T>(x: T) {
    debugit::debugit!("", x);
}

fn main() {
    use std::cell::RefCell;
    struct Struct<S>(RefCell<S>);
    impl<'a> fmt::Debug for Struct<(&mut &'a str, &'a str)> {
        fn fmt(&self, _: &mut fmt::Formatter<'_>) -> fmt::Result {
            let mut this = self.0.borrow_mut();
            *this.0 = this.1;
            Ok(())
        }
    }
    let mut s = "";
    {
        let x = "Hello World!".to_owned();
        foo(Struct(RefCell::new((&mut s, x.as_str()))));
    }
    println!("{}", s); // outputs like "��B�" indicate using the String after its dropped
}