Add test

Author: daxpedda

tests/ui/serde/serde.rs

@@ -2,6 +2,10 @@ use std::marker::PhantomData;
 
 use derive_where::derive_where;
 
+#[derive_where(Clone)]
+#[serde(crate = "serde_")]
+struct ValidSerde<T>(PhantomData<T>);
+
 #[derive_where(Deserialize)]
 #[serde(bound = "")]
 struct ConflictingBound<T>(PhantomData<T>);

tests/ui/serde/serde.stderr

@@ -1,5 +1,5 @@
 error: Found conflicting `#[serde(bound ...)]`
- --> tests/ui/serde/serde.rs:6:9
-  |
-6 | #[serde(bound = "")]
-  |         ^^^^^^^^^^
+  --> tests/ui/serde/serde.rs:10:9
+   |
+10 | #[serde(bound = "")]
+   |         ^^^^^^^^^^