use an into for new

src/lib.rs

@@ -27,7 +27,8 @@ impl Rear {
 
 	/// Create a new `Rear` from an error implementing `std::error::Error` with
 	/// a message from anything that implementes `Into<String>`.
-	pub fn new<S: Into<String>>(error: Box<dyn Error>, message: S) -> Self {
+	pub fn new<E: Into<Box<dyn Error>>, S: Into<String>>(error: E, message: S) -> Self {
+		let error = error.into();
 		let message = message.into();
 
 		Self {