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use std::error::Error; use std::fmt; use Fail; pub struct BoxStd(pub Box<dyn Error + Send + Sync + 'static>); impl fmt::Display for BoxStd { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) } } impl fmt::Debug for BoxStd { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(&self.0, f) } } impl Fail for BoxStd {}