From f29fd71e089096b6510b94164353f73b62949a7a Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Wed, 20 Oct 2021 17:16:08 -0600
Subject: [PATCH] signature: show error source in `Display` impl

Previously the `Display` impl on `Error` didn't include source
information if available.

This change displays it if available.
---
 signature/src/error.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/signature/src/error.rs b/signature/src/error.rs
index 31e58c801..06e22d527 100644
--- a/signature/src/error.rs
+++ b/signature/src/error.rs
@@ -78,7 +78,16 @@ impl Debug for Error {
 
 impl Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str("signature error")
+        f.write_str("signature error")?;
+
+        #[cfg(feature = "std")]
+        {
+            if let Some(source) = &self.source {
+                write!(f, ": {}", source)?;
+            }
+        }
+
+        Ok(())
     }
 }