Box SystemTime in EncodeError

src/error.rs

@@ -48,7 +48,7 @@ pub enum EncodeError {
         /// The error that was thrown by the SystemTime
         inner: std::time::SystemTimeError,
         /// The SystemTime that caused the error
-        time: std::time::SystemTime,
+        time: std::boxed::Box<std::time::SystemTime>,
     },
 
     #[cfg(feature = "serde")]

src/features/impl_std.rs

@@ -218,7 +218,7 @@ impl Encode for SystemTime {
         let duration = self.duration_since(SystemTime::UNIX_EPOCH).map_err(|e| {
             EncodeError::InvalidSystemTime {
                 inner: e,
-                time: *self,
+                time: std::boxed::Box::new(*self),
             }
         })?;
         duration.encode(encoder)

tests/error_size.rs

@@ -7,10 +7,7 @@ fn decode_error_size() {
 
 #[test]
 fn encode_error_size() {
-    #[cfg(feature = "std")]
-    assert_eq!(std::mem::size_of::<bincode::error::EncodeError>(), 40);
-
-    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    #[cfg(any(feature = "std", feature = "alloc"))]
     assert_eq!(std::mem::size_of::<bincode::error::EncodeError>(), 32);
 
     #[cfg(not(any(feature = "std", feature = "alloc")))]