From 0822c1a2ec9ccbc1e4e97df9beb013dd563c72cc Mon Sep 17 00:00:00 2001
From: Charles Edward Gagnon <charlesedgagnon@gmail.com>
Date: Tue, 24 Jun 2025 19:30:33 -0400
Subject: [PATCH 1/2] remove blanket `SignerMut` impl (breaking change)

---
 signature/src/signer.rs | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/signature/src/signer.rs b/signature/src/signer.rs
index b9eec6eab..7fc10764f 100644
--- a/signature/src/signer.rs
+++ b/signature/src/signer.rs
@@ -55,13 +55,6 @@ pub trait SignerMut<S> {
     fn try_sign(&mut self, msg: &[u8]) -> Result<S, Error>;
 }
 
-/// Blanket impl of [`SignerMut`] for all [`Signer`] types.
-impl<S, T: Signer<S>> SignerMut<S> for T {
-    fn try_sign(&mut self, msg: &[u8]) -> Result<S, Error> {
-        T::try_sign(self, msg)
-    }
-}
-
 /// Sign the given prehashed message [`Digest`] using `Self`.
 ///
 /// ## Notes

From d02de5bb2fa27aefee6717ed54e906072dd8b16b Mon Sep 17 00:00:00 2001
From: Charles Edward Gagnon <charlesedgagnon@gmail.com>
Date: Tue, 24 Jun 2025 19:34:17 -0400
Subject: [PATCH 2/2] update CHANGELOG

---
 signature/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/signature/CHANGELOG.md b/signature/CHANGELOG.md
index 1f0304fbf..619aa4e92 100644
--- a/signature/CHANGELOG.md
+++ b/signature/CHANGELOG.md
@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 - `std` feature - replaced with `core::error::Error`
 - `derive` feature
+- `SignerMut` blanket implementation for `Signer`
 
 [#1448]: https://github.com/RustCrypto/traits/pull/1448
 [#1759]: https://github.com/RustCrypto/traits/pull/1759