add error chainHEADmain

Sponsored-by: author

1 files changed, 7 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index ceb34da..71a3709 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,13 @@
+use std::error::Error;
+
 fn main() {
     if let Err(e) = fallible_main() {
         eprintln!("ERROR: {}", e);
+        let mut err = e.source();
+        while let Some(underlying) = err {
+            eprintln!("caused by: {}", underlying);
+            err = underlying.source();
+        }
     }
 }