From c5fe4709e02ff0362229e1d78fa293643f1f43ee Mon Sep 17 00:00:00 2001
From: Jake Goulding <jake.goulding@gmail.com>
Date: Fri, 22 Dec 2023 14:02:58 -0500
Subject: [PATCH] Mirror std Error's deprecated methods on our `Error` trait

Closes #425
---
 src/no_std_error.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/no_std_error.rs b/src/no_std_error.rs
index 426e3a84..5cf916dd 100644
--- a/src/no_std_error.rs
+++ b/src/no_std_error.rs
@@ -3,12 +3,19 @@
 use core::fmt::{Debug, Display};
 
 pub trait Error: Debug + Display {
+    #[deprecated(since = "1.42.0", note = "use the Display impl or to_string()")]
     fn description(&self) -> &str {
         "description() is deprecated; use Display"
     }
+
+    #[deprecated(
+        since = "1.33.0",
+        note = "replaced by Error::source, which can support downcasting"
+    )]
     fn cause(&self) -> Option<&dyn Error> {
         self.source()
     }
+
     fn source(&self) -> Option<&(dyn Error + 'static)> {
         None
     }