From 1e503a8d3be3994f5e88b505a7e6d702c78230da Mon Sep 17 00:00:00 2001
From: "Tobin C. Harding" <me@tobin.cc>
Date: Fri, 17 Jan 2025 13:28:21 +1100
Subject: [PATCH 1/2] Remove deprecated std::error::Error trait method impls

The `description` method was deprecated in Rust `v1.42`. The `cause`
method was deprecated in Rust `v1.33`. Our MSRV is now Rust `v1.63`.

We do not need to implement the deprecated functions any longer.

Fix: #3869
---
 io/src/error.rs | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/io/src/error.rs b/io/src/error.rs
index 172dd3d6a..6ef943e42 100644
--- a/io/src/error.rs
+++ b/io/src/error.rs
@@ -76,19 +76,6 @@ impl std::error::Error for Error {
     fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
         self.error.as_ref().and_then(|e| e.as_ref().source())
     }
-
-    #[allow(deprecated)]
-    fn description(&self) -> &str {
-        match self.error.as_ref() {
-            Some(e) => e.description(),
-            None => self.kind.description(),
-        }
-    }
-
-    #[allow(deprecated)]
-    fn cause(&self) -> Option<&dyn std::error::Error> {
-        self.error.as_ref().and_then(|e| e.as_ref().cause())
-    }
 }
 
 #[cfg(feature = "std")]

From 0719997feef4ef8b2686e570d4083f88be9c5bb0 Mon Sep 17 00:00:00 2001
From: "Tobin C. Harding" <me@tobin.cc>
Date: Fri, 17 Jan 2025 13:31:55 +1100
Subject: [PATCH 2/2] api: Run just check-api

---
 api/io/all-features.txt | 2 --
 1 file changed, 2 deletions(-)

diff --git a/api/io/all-features.txt b/api/io/all-features.txt
index 8f3698e43..1a6cb4f7a 100644
--- a/api/io/all-features.txt
+++ b/api/io/all-features.txt
@@ -239,8 +239,6 @@ pub fn bitcoin_io::Cursor<T>::inner(&self) -> &T
 pub fn bitcoin_io::Cursor<T>::into_inner(self) -> T
 pub fn bitcoin_io::Cursor<T>::read(&mut self, buf: &mut [u8]) -> bitcoin_io::Result<usize>
 pub fn bitcoin_io::Cursor<T>::set_position(&mut self, position: u64)
-pub fn bitcoin_io::Error::cause(&self) -> core::option::Option<&dyn core::error::Error>
-pub fn bitcoin_io::Error::description(&self) -> &str
 pub fn bitcoin_io::Error::fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result
 pub fn bitcoin_io::Error::fmt(&self, fmt: &mut core::fmt::Formatter<'_>) -> core::result::Result<(), core::fmt::Error>
 pub fn bitcoin_io::Error::from(kind: bitcoin_io::ErrorKind) -> bitcoin_io::Error