From 7268f39e6a6a7379ee2ac0d6260892c19f5e83a7 Mon Sep 17 00:00:00 2001
From: Yan Chen <yan.chen@dfinity.org>
Date: Mon, 16 Oct 2023 19:40:10 -0700
Subject: [PATCH] fix

---
 rust/candid/src/de.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rust/candid/src/de.rs b/rust/candid/src/de.rs
index ab7bb70f..036440c6 100644
--- a/rust/candid/src/de.rs
+++ b/rust/candid/src/de.rs
@@ -423,7 +423,11 @@ impl<'de> Deserializer<'de> {
     where
         V: Visitor<'de>,
     {
-        Err(Error::msg("Cannot decode empty type"))
+        Err(if *self.wire_type == TypeInner::Empty {
+            Error::msg("Cannot decode empty type")
+        } else {
+            Error::subtype("Cannot decode empty type")
+        })
     }
     fn deserialize_future<'a, V>(&'a mut self, visitor: V) -> Result<V::Value>
     where