Yes sure but to make it the default asserts that it's the correct thing to do in all cases. Those aren't assertions rust folks tend to make, and for things like

Yes sure but to make it the default asserts that it's the correct thing to do in all cases. Those aren't assertions rust folks tend to make, and for things like logging that's really up to the application how things are logged anyway. Plus if you're issuing a filesystem call you're almost definitely in possession of the filename anyway so it's just a matter of format!("failed to write: {:?}: {:?}", err, filename).