//! Check that `String` and `&str` can be converted into `Box` and //! `Box` trait objects //@ run-pass use std::error::Error; fn main() { let _err1: Box = From::from("test".to_string()); let _err2: Box = From::from("test".to_string()); let _err3: Box = From::from("test"); let _err4: Box = From::from("test"); }