backtrace

hptp-recv/src/main.rs

@@ -1,3 +1,4 @@
+#![feature(backtrace)]
 extern crate hptp;
 extern crate tokio;
 #[macro_use]
@@ -9,8 +10,12 @@ use tokio::net::UdpSocket;
 
 #[derive(Error, Debug)]
 enum Error {
-    #[error("io error: {0}")]
-    Io(#[from] tokio::io::Error),
+    #[error("io error: {source}")]
+    Io {
+        #[from]
+        source: tokio::io::Error,
+        backtrace: std::backtrace::Backtrace,
+    },
     #[error("no UDP port available for listening")]
     NoPortAvail,
 }
@@ -23,7 +28,11 @@ fn entry() -> Result<(), Error> {
 
 fn main() {
     if let Err(e) = entry() {
-        println!("ERROR: {}", e);
+        use std::error::Error;
+        println!("Error: {}", e);
+        for bt in e.backtrace() {
+            println!("{}", bt);
+        }
     }
 }