Destructure error types in source impls

diff --git a/base58/src/error.rs b/base58/src/error.rs
index c223ba7c..25c16cc4 100644
--- a/base58/src/error.rs
+++ b/base58/src/error.rs
@@ -117,7 +117,10 @@ impl fmt::Display for IncorrectChecksumError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for IncorrectChecksumError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { incorrect: _, expected: _ } = self;
+        None
+    }
 }
 
 /// The decoded base58 data was too short (require at least 4 bytes for checksum).
@@ -143,7 +146,10 @@ impl fmt::Display for TooShortError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for TooShortError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { length: _ } = self;
+        None
+    }
 }
 
 /// Found an invalid ASCII byte while decoding base58 string.
@@ -178,5 +184,8 @@ impl fmt::Display for InvalidCharacterError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidCharacterError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
diff --git a/bitcoin/src/address/error.rs b/bitcoin/src/address/error.rs
index 867809b9..34a5d37b 100644
--- a/bitcoin/src/address/error.rs
+++ b/bitcoin/src/address/error.rs
@@ -68,7 +68,10 @@ impl fmt::Display for UnknownAddressTypeError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnknownAddressTypeError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Address parsing error.
@@ -135,7 +138,10 @@ impl fmt::Display for UnknownHrpError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnknownHrpError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Address's network differs from required one.
@@ -157,7 +163,10 @@ impl fmt::Display for NetworkValidationError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for NetworkValidationError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { required: _, address: _ } = self;
+        None
+    }
 }
 
 /// Bech32 related error.
@@ -312,7 +321,10 @@ impl fmt::Display for InvalidBase58PayloadLengthError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidBase58PayloadLengthError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { length: _ } = self;
+        None
+    }
 }
 
 /// Legacy base58 address was too long, max 50 characters.
@@ -339,7 +351,10 @@ impl fmt::Display for LegacyAddressTooLongError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for LegacyAddressTooLongError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { length: _ } = self;
+        None
+    }
 }
 
 /// Invalid legacy address prefix in decoded base58 data.
@@ -362,5 +377,8 @@ impl fmt::Display for InvalidLegacyPrefixError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidLegacyPrefixError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { invalid: _ } = self;
+        None
+    }
 }
diff --git a/bitcoin/src/blockdata/script/witness_version.rs b/bitcoin/src/blockdata/script/witness_version.rs
index d128d738..6119c31c 100644
--- a/bitcoin/src/blockdata/script/witness_version.rs
+++ b/bitcoin/src/blockdata/script/witness_version.rs
@@ -266,6 +266,9 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for TryFromError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { invalid: _ } = self;
+            None
+        }
     }
 }
diff --git a/bitcoin/src/blockdata/transaction.rs b/bitcoin/src/blockdata/transaction.rs
index dabc34be..e136700c 100644
--- a/bitcoin/src/blockdata/transaction.rs
+++ b/bitcoin/src/blockdata/transaction.rs
@@ -1270,7 +1270,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for IndexOutOfBoundsError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { index: _, length: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/bitcoin/src/crypto/sighash.rs b/bitcoin/src/crypto/sighash.rs
index 391fb782..75cbca0e 100644
--- a/bitcoin/src/crypto/sighash.rs
+++ b/bitcoin/src/crypto/sighash.rs
@@ -1051,7 +1051,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for PrevoutsSizeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self {} = self;
+            None
+        }
     }
 
     /// A single prevout was provided but all prevouts are needed without `ANYONECANPAY`.
@@ -1067,7 +1070,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for PrevoutsKindError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self {} = self;
+            None
+        }
     }
 
     /// [`Prevouts`] index related errors.
@@ -1237,7 +1243,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for SingleMissingOutputError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { input_index: _, outputs_length: _ } = self;
+            None
+        }
     }
 
     /// Annex must be at least one byte long and the first bytes must be `0x50`.
diff --git a/bitcoin/src/network/mod.rs b/bitcoin/src/network/mod.rs
index ea781eae..94c3032c 100644
--- a/bitcoin/src/network/mod.rs
+++ b/bitcoin/src/network/mod.rs
@@ -99,7 +99,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for UnknownChainHashError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     impl TryFrom<ChainHash> for Network {
diff --git a/bitcoin/src/taproot/merkle_branch/mod.rs b/bitcoin/src/taproot/merkle_branch/mod.rs
index b86c2104..4852edb6 100644
--- a/bitcoin/src/taproot/merkle_branch/mod.rs
+++ b/bitcoin/src/taproot/merkle_branch/mod.rs
@@ -59,7 +59,10 @@ impl fmt::Display for DecodeError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for DecodeError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { num_bytes: _ } = self;
+        None
+    }
 }
 
 impl From<DecodeError> for TaprootError {
diff --git a/bitcoin/src/taproot/mod.rs b/bitcoin/src/taproot/mod.rs
index 12b2fa0d..24ece6c5 100644
--- a/bitcoin/src/taproot/mod.rs
+++ b/bitcoin/src/taproot/mod.rs
@@ -1408,7 +1408,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidMerkleBranchSizeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// Merkle tree depth must not be more than 128.
@@ -1436,7 +1439,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidMerkleTreeDepthError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// Invalid control block size.
@@ -1464,7 +1470,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidControlBlockSizeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 }
 
diff --git a/consensus_encoding/src/error.rs b/consensus_encoding/src/error.rs
index d98fcbc3..1f8c4268 100644
--- a/consensus_encoding/src/error.rs
+++ b/consensus_encoding/src/error.rs
@@ -110,7 +110,10 @@ impl fmt::Display for UnconsumedError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnconsumedError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self() = self;
+        None
+    }
 }
 
 /// An error consensus decoding a compact size encoded integer.
@@ -194,7 +197,10 @@ impl core::fmt::Display for LengthPrefixExceedsMaxError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for LengthPrefixExceedsMaxError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { limit: _, value: _ } = self;
+        None
+    }
 }
 
 /// The error returned by the [`ByteVecDecoder`].
@@ -313,7 +319,10 @@ impl fmt::Display for UnexpectedEofError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnexpectedEofError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { missing: _ } = self;
+        None
+    }
 }
 
 /// Helper macro to define an error type for a `DecoderN`.
diff --git a/crypto/src/key.rs b/crypto/src/key.rs
index 0b6c0a24..2d16d2ce 100644
--- a/crypto/src/key.rs
+++ b/crypto/src/key.rs
@@ -1765,7 +1765,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for UncompressedPublicKeyError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self {} = self;
+            None
+        }
     }
 
     /// Decoded base58 data was an invalid length.
@@ -1800,7 +1803,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidBase58PayloadLengthError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { length: _ } = self;
+            None
+        }
     }
 
     /// Invalid address version in decoded base58 data.
@@ -1831,7 +1837,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidAddressVersionError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { invalid: _ } = self;
+            None
+        }
     }
 
     /// Invalid compression flag for a WIF key
@@ -1867,7 +1876,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidWifCompressionFlagError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { invalid: _ } = self;
+            None
+        }
     }
 
     /// Error that can occur when parsing an [`XOnlyPublicKey`] from bytes.
diff --git a/crypto/src/sighash.rs b/crypto/src/sighash.rs
index 48202dbf..f3062ba1 100644
--- a/crypto/src/sighash.rs
+++ b/crypto/src/sighash.rs
@@ -243,7 +243,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidSighashTypeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// This type is consensus valid but an input including it would prevent the transaction from
@@ -259,7 +262,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for NonStandardSighashTypeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// Error returned for failure during parsing one of the sighash types.
@@ -280,7 +286,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for SighashTypeParseError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { unrecognized: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/hashes/src/hkdf/mod.rs b/hashes/src/hkdf/mod.rs
index d7ac841f..9b10841b 100644
--- a/hashes/src/hkdf/mod.rs
+++ b/hashes/src/hkdf/mod.rs
@@ -167,7 +167,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for MaxLengthError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { max: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/hashes/src/sha256/mod.rs b/hashes/src/sha256/mod.rs
index 744c5bc0..9b27a447 100644
--- a/hashes/src/sha256/mod.rs
+++ b/hashes/src/sha256/mod.rs
@@ -312,6 +312,14 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for MidstateError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self {
+                invalid_n_bytes_hashed: _,
+                block_aligned_midstate: _,
+                unprocessed_bytes: _,
+                unprocessed_bytes_len: _,
+            } = self;
+            None
+        }
     }
 }
diff --git a/key_expression/src/bip32.rs b/key_expression/src/bip32.rs
index b418889d..7f23b3e4 100644
--- a/key_expression/src/bip32.rs
+++ b/key_expression/src/bip32.rs
@@ -1282,7 +1282,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for IndexOutOfRangeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { index: _ } = self;
+            None
+        }
     }
 
     /// Error parsing a child number.
@@ -1389,7 +1392,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidBase58PayloadLengthError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { length: _ } = self;
+            None
+        }
     }
 
     /// Master seed had an invalid length.
@@ -1419,7 +1425,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidSeedLengthError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { length: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/network/src/lib.rs b/network/src/lib.rs
index 7e96de35..55baf4c4 100644
--- a/network/src/lib.rs
+++ b/network/src/lib.rs
@@ -311,7 +311,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for ParseNetworkError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 }
 
diff --git a/p2p/src/bip152.rs b/p2p/src/bip152.rs
index b567800a..228958f6 100644
--- a/p2p/src/bip152.rs
+++ b/p2p/src/bip152.rs
@@ -769,7 +769,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for TxIndexOutOfRangeError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// An error occuring decoding a [`BlockTransactions`] message.
diff --git a/p2p/src/error.rs b/p2p/src/error.rs
index 757bddcc..6b6fb5d4 100644
--- a/p2p/src/error.rs
+++ b/p2p/src/error.rs
@@ -110,7 +110,10 @@ impl fmt::Display for UnknownMagicError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnknownMagicError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Error in creating a Magic from a Network.
@@ -124,5 +127,8 @@ impl fmt::Display for UnknownNetworkError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for UnknownNetworkError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
diff --git a/p2p/src/message.rs b/p2p/src/message.rs
index 4ced5ac7..3bd6ab00 100644
--- a/p2p/src/message.rs
+++ b/p2p/src/message.rs
@@ -1903,7 +1903,10 @@ pub mod error {
     }
 
     impl std::error::Error for CommandStringError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// An error consensus decoding a [`V1MessageHeader`].
diff --git a/primitives/src/hash_types/script_hash.rs b/primitives/src/hash_types/script_hash.rs
index 460bb5b2..762af4ff 100644
--- a/primitives/src/hash_types/script_hash.rs
+++ b/primitives/src/hash_types/script_hash.rs
@@ -90,7 +90,10 @@ impl fmt::Display for RedeemScriptSizeError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for RedeemScriptSizeError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { size: _ } = self;
+        None
+    }
 }
 
 // The new hash wrapper type.
diff --git a/primitives/src/hash_types/witness_script_hash.rs b/primitives/src/hash_types/witness_script_hash.rs
index 66d5af6d..4b38f81d 100644
--- a/primitives/src/hash_types/witness_script_hash.rs
+++ b/primitives/src/hash_types/witness_script_hash.rs
@@ -85,7 +85,10 @@ impl fmt::Display for WitnessScriptSizeError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for WitnessScriptSizeError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { size: _ } = self;
+        None
+    }
 }
 
 include!("./generic.rs");
diff --git a/primitives/src/script/push_bytes.rs b/primitives/src/script/push_bytes.rs
index db6a4829..48dc940e 100644
--- a/primitives/src/script/push_bytes.rs
+++ b/primitives/src/script/push_bytes.rs
@@ -379,7 +379,7 @@ mod error {
     #[allow(unused)]
     #[derive(Debug, Clone, PartialEq, Eq)]
     pub struct PushBytesError {
-        never: core::convert::Infallible,
+        pub(super) never: core::convert::Infallible,
     }
 
     impl super::PushBytesErrorReport for PushBytesError {
@@ -427,7 +427,13 @@ impl From<Infallible> for PushBytesError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for PushBytesError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        #[cfg(any(target_pointer_width = "16", target_pointer_width = "32"))]
+        let Self { never: _ } = self;
+        #[cfg(not(any(target_pointer_width = "16", target_pointer_width = "32")))]
+        let Self { len: _ } = self;
+        None
+    }
 }
 
 #[cfg(test)]
diff --git a/primitives/src/witness.rs b/primitives/src/witness.rs
index 2362eb48..c73fc618 100644
--- a/primitives/src/witness.rs
+++ b/primitives/src/witness.rs
@@ -998,7 +998,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for UnexpectedEofError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { missing_elements: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/taproot-primitives/src/lib.rs b/taproot-primitives/src/lib.rs
index eb0b5cb6..cb972688 100644
--- a/taproot-primitives/src/lib.rs
+++ b/taproot-primitives/src/lib.rs
@@ -302,7 +302,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for InvalidTaprootLeafVersionError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 }
 
diff --git a/units/src/amount/error.rs b/units/src/amount/error.rs
index b8937c2e..3fa11e63 100644
--- a/units/src/amount/error.rs
+++ b/units/src/amount/error.rs
@@ -194,7 +194,10 @@ impl fmt::Display for OutOfRangeError {
 #[cfg(feature = "std")]
 impl std::error::Error for OutOfRangeError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { is_signed: _, is_greater_than_max: _ } = self;
+        None
+    }
 }
 
 /// Error returned when the input string has higher precision than satoshis.
@@ -223,7 +226,10 @@ impl fmt::Display for TooPreciseError {
 #[cfg(feature = "std")]
 impl std::error::Error for TooPreciseError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { position: _ } = self;
+        None
+    }
 }
 
 /// Error returned when the input string is too large.
@@ -256,7 +262,10 @@ impl fmt::Display for InputTooLargeError {
 #[cfg(feature = "std")]
 impl std::error::Error for InputTooLargeError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { len: _ } = self;
+        None
+    }
 }
 
 /// Error returned when digits were expected in the input but there were none.
@@ -285,7 +294,10 @@ impl fmt::Display for MissingDigitsError {
 #[cfg(feature = "std")]
 impl std::error::Error for MissingDigitsError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { kind: _ } = self;
+        None
+    }
 }
 
 #[derive(Debug, Clone, Eq, PartialEq)]
@@ -322,7 +334,10 @@ impl fmt::Display for InvalidCharacterError {
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidCharacterError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { invalid_char: _, position: _ } = self;
+        None
+    }
 }
 
 /// Error returned when a valid character (e.g. '_') is in an invalid/bad position.
@@ -355,7 +370,10 @@ impl fmt::Display for BadPositionError {
 #[cfg(feature = "std")]
 impl std::error::Error for BadPositionError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { char: _, position: _ } = self;
+        None
+    }
 }
 
 /// An error during amount parsing.
@@ -410,7 +428,10 @@ impl fmt::Display for MissingDenominationError {
 #[cfg(feature = "std")]
 impl std::error::Error for MissingDenominationError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self {} = self;
+        None
+    }
 }
 
 /// Error returned when parsing an unknown denomination.
@@ -432,7 +453,10 @@ impl fmt::Display for UnknownDenominationError {
 #[cfg(feature = "std")]
 impl std::error::Error for UnknownDenominationError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Error returned when parsing a possibly confusing denomination.
@@ -453,7 +477,10 @@ impl fmt::Display for PossiblyConfusingDenominationError {
 #[cfg(feature = "std")]
 impl std::error::Error for PossiblyConfusingDenominationError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// An error consensus decoding an `Amount`.
diff --git a/units/src/block.rs b/units/src/block.rs
index 4d86d10a..349e3213 100644
--- a/units/src/block.rs
+++ b/units/src/block.rs
@@ -657,7 +657,10 @@ pub mod error {
 
     #[cfg(feature = "std")]
     impl std::error::Error for TooBigForRelativeHeightError {
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 
     /// An error consensus decoding an `BlockHeight`.
diff --git a/units/src/fee_rate/serde.rs b/units/src/fee_rate/serde.rs
index 4d66e865..1ba3e12a 100644
--- a/units/src/fee_rate/serde.rs
+++ b/units/src/fee_rate/serde.rs
@@ -424,5 +424,8 @@ impl fmt::Display for OverflowError {
 #[cfg(feature = "std")]
 impl std::error::Error for OverflowError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self {} = self;
+        None
+    }
 }
diff --git a/units/src/locktime/absolute/error.rs b/units/src/locktime/absolute/error.rs
index 8267e1d1..8115aa75 100644
--- a/units/src/locktime/absolute/error.rs
+++ b/units/src/locktime/absolute/error.rs
@@ -73,7 +73,10 @@ impl fmt::Display for IncompatibleHeightError {
 #[cfg(feature = "std")]
 impl std::error::Error for IncompatibleHeightError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { lock: _, incompatible: _ } = self;
+        None
+    }
 }
 
 /// Tried to satisfy a lock-by-height lock using a height value.
@@ -113,7 +116,10 @@ impl fmt::Display for IncompatibleTimeError {
 #[cfg(feature = "std")]
 impl std::error::Error for IncompatibleTimeError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { lock: _, incompatible: _ } = self;
+        None
+    }
 }
 
 /// Error returned when parsing block height fails.
@@ -324,7 +330,10 @@ impl fmt::Display for ConversionError {
 #[cfg(feature = "std")]
 impl std::error::Error for ConversionError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { unit: _, input: _ } = self;
+        None
+    }
 }
 
 /// Describes the two types of locking, lock-by-height and lock-by-time.
diff --git a/units/src/locktime/relative/error.rs b/units/src/locktime/relative/error.rs
index baf31637..6946d899 100644
--- a/units/src/locktime/relative/error.rs
+++ b/units/src/locktime/relative/error.rs
@@ -35,7 +35,10 @@ impl fmt::Display for DisabledLockTimeError {
 #[cfg(feature = "std")]
 impl std::error::Error for DisabledLockTimeError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Error returned when attempting to satisfy lock fails.
@@ -123,7 +126,10 @@ impl fmt::Display for IncompatibleHeightError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for IncompatibleHeightError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Error returned when `is_satisfied_by_time` fails.
@@ -177,7 +183,10 @@ impl fmt::Display for IncompatibleTimeError {
 
 #[cfg(feature = "std")]
 impl std::error::Error for IncompatibleTimeError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self(_) = self;
+        None
+    }
 }
 
 /// Error returned when the input time in seconds was too large to be encoded to a 16 bit 512 second interval.
@@ -205,7 +214,10 @@ impl fmt::Display for TimeOverflowError {
 #[cfg(feature = "std")]
 impl std::error::Error for TimeOverflowError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { seconds: _ } = self;
+        None
+    }
 }
 
 /// Error returned when `NumberOfBlocks::is_satisfied_by` is incorrectly called.
@@ -231,7 +243,10 @@ impl fmt::Display for InvalidHeightError {
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidHeightError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { chain_tip: _, utxo_mined_at: _ } = self;
+        None
+    }
 }
 
 /// Error returned when `NumberOf512Seconds::is_satisfied_by` is incorrectly called.
@@ -257,7 +272,10 @@ impl fmt::Display for InvalidTimeError {
 #[cfg(feature = "std")]
 impl std::error::Error for InvalidTimeError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        let Self { chain_tip: _, utxo_mined_at: _ } = self;
+        None
+    }
 }
 
 #[cfg(test)]
diff --git a/units/src/parse_int.rs b/units/src/parse_int.rs
index 51e4c829..fe859b81 100644
--- a/units/src/parse_int.rs
+++ b/units/src/parse_int.rs
@@ -566,7 +566,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for MissingPrefixError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { hex: _ } = self;
+            None
+        }
     }
 
     /// Error when hex string contains a prefix (e.g. 0x).
@@ -594,7 +597,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for ContainsPrefixError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self { hex: _ } = self;
+            None
+        }
     }
 }
 
diff --git a/units/src/result.rs b/units/src/result.rs
index f8e8e984..f783481a 100644
--- a/units/src/result.rs
+++ b/units/src/result.rs
@@ -440,7 +440,10 @@ pub mod error {
     #[cfg(feature = "std")]
     impl std::error::Error for NumOpError {
         #[inline]
-        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+        fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+            let Self(_) = self;
+            None
+        }
     }
 }