From 7c42b2132589ae3a3686ca2b25bd6b32889629f8 Mon Sep 17 00:00:00 2001
From: Valentin Kettner <vakevk+git@gmail.com>
Date: Wed, 19 Feb 2020 16:20:18 +0100
Subject: [PATCH 1/2] Implement Error for FromDecStrErr

---
 uint/src/uint.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/uint/src/uint.rs b/uint/src/uint.rs
index ac0ffc85e..615e880f8 100644
--- a/uint/src/uint.rs
+++ b/uint/src/uint.rs
@@ -38,6 +38,21 @@ pub enum FromDecStrErr {
 	InvalidLength,
 }
 
+impl std::fmt::Display for FromDecStrErr {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(
+			f,
+			"{}",
+			match self {
+				FromDecStrErr::InvalidCharacter => "a character is not in the range 0-9",
+				FromDecStrErr::InvalidLength => "the number is too large for the type",
+			}
+		)
+	}
+}
+
+impl std::error::Error for FromDecStrErr {}
+
 #[macro_export]
 #[doc(hidden)]
 macro_rules! impl_map_from {

From d8210552e43cf3f4b89b558d88734283f40b0a41 Mon Sep 17 00:00:00 2001
From: Valentin Kettner <vakevk+git@gmail.com>
Date: Fri, 21 Feb 2020 14:08:19 +0100
Subject: [PATCH 2/2] Only implement Error with std feature

---
 uint/src/uint.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/uint/src/uint.rs b/uint/src/uint.rs
index 615e880f8..493e2e21e 100644
--- a/uint/src/uint.rs
+++ b/uint/src/uint.rs
@@ -38,6 +38,7 @@ pub enum FromDecStrErr {
 	InvalidLength,
 }
 
+#[cfg(feature = "std")]
 impl std::fmt::Display for FromDecStrErr {
 	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 		write!(
@@ -51,6 +52,7 @@ impl std::fmt::Display for FromDecStrErr {
 	}
 }
 
+#[cfg(feature = "std")]
 impl std::error::Error for FromDecStrErr {}
 
 #[macro_export]