//@ run-pass // Ensure that both `Box` and `Box` can be // obtained from `String`. 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"); }