Slug: own-drop-01 · Paired reading: Chapter 5
Prompt
Implement Probe that pushes its &'static str name into a shared
std::cell::RefCell<Vec<&'static str>> on drop. Provide
fn drop_order(log: &RefCell<Vec<&'static str>>) that creates probes
named "a" then "b" in that order and lets them go out of scope.
Predict first
In which order do the names appear in log after drop_order returns?