2 files changed, 6 insertions, 7 deletions
diff --git a/compiler/rustc_data_structures/src/fingerprint.rs b/compiler/rustc_data_structures/src/fingerprint.rs
index c88f3e73cff..a032b039f34 100644
--- a/compiler/rustc_data_structures/src/fingerprint.rs
+++ b/compiler/rustc_data_structures/src/fingerprint.rs
@@ -144,9 +144,8 @@ impl_stable_hash_via_hash!(Fingerprint);
 
 impl<E: rustc_serialize::Encoder> Encodable<E> for Fingerprint {
     #[inline]
-    fn encode(&self, s: &mut E) -> Result<(), E::Error> {
-        s.emit_raw_bytes(&self.to_le_bytes())?;
-        Ok(())
+    fn encode(&self, s: &mut E) {
+        s.emit_raw_bytes(&self.to_le_bytes());
     }
 }
 
@@ -187,10 +186,10 @@ impl std::fmt::Display for PackedFingerprint {
 
 impl<E: rustc_serialize::Encoder> Encodable<E> for PackedFingerprint {
     #[inline]
-    fn encode(&self, s: &mut E) -> Result<(), E::Error> {
+    fn encode(&self, s: &mut E) {
         // Copy to avoid taking reference to packed field.
         let copy = self.0;
-        copy.encode(s)
+        copy.encode(s);
     }
 }
 
diff --git a/compiler/rustc_data_structures/src/svh.rs b/compiler/rustc_data_structures/src/svh.rs
index 12ef286091c..61654b9e8f5 100644
--- a/compiler/rustc_data_structures/src/svh.rs
+++ b/compiler/rustc_data_structures/src/svh.rs
@@ -49,8 +49,8 @@ impl fmt::Display for Svh {
 }
 
 impl<S: Encoder> Encodable<S> for Svh {
-    fn encode(&self, s: &mut S) -> Result<(), S::Error> {
-        s.emit_u64(self.as_u64().to_le())
+    fn encode(&self, s: &mut S) {
+        s.emit_u64(self.as_u64().to_le());
     }
 }