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//@ run-pass
use std::cell::RefCell;
use std::cmp::Ordering;
struct Evil<'a, 'b> {
values: RefCell<Vec<&'a str>>,
to_insert: &'b String,
}
impl<'a, 'b> PartialEq for Evil<'a, 'b> {
fn eq(&self, _other: &Self) -> bool {
true
}
}
impl<'a> PartialOrd for Evil<'a, 'a> {
fn partial_cmp(&self, _other: &Self) -> Option<Ordering> {
self.values.borrow_mut().push(self.to_insert);
None
}
}
fn main() {
let e;
let values;
{
let to_insert = String::from("Hello, world!");
e = Evil { values: RefCell::new(Vec::new()), to_insert: &to_insert };
let range = &e..=&e;
let _ = range == range;
values = e.values;
}
assert_eq!(*values.borrow(), Vec::<&str>::new());
}
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