Error on duplicate attributes

serde_macros/tests/compile-fail/duplicate_attributes.rs

@@ -0,0 +1,25 @@
+#![feature(custom_attribute, custom_derive, plugin)]
+#![plugin(serde_macros)]
+
+#[derive(Serialize)]
+struct S {
+    #[serde(rename(serialize="x"))]
+    #[serde(rename(serialize="y"))] //~ ERROR: duplicate serde attribute `rename`
+    a: (),                          //~^ ERROR: duplicate serde attribute `rename`
+                                    //~^^ ERROR: duplicate serde attribute `rename`
+
+    #[serde(rename(serialize="x"))]
+    #[serde(rename="y")] //~ ERROR: duplicate serde attribute `rename`
+    b: (),               //~^ ERROR: duplicate serde attribute `rename`
+                         //~^^ ERROR: duplicate serde attribute `rename`
+
+    #[serde(rename(serialize="x"))]
+    #[serde(rename(deserialize="y"))] // ok
+    c: (),
+
+    #[serde(rename="x")]
+    #[serde(rename(deserialize="y"))] //~ ERROR: duplicate serde attribute `rename`
+    d: (),                            //~^ ERROR: duplicate serde attribute `rename`
+}                                     //~^^ ERROR: duplicate serde attribute `rename`
+
+fn main() {}

serde_macros/tests/compile-fail/duplicate_attributes.rs_

@@ -1,13 +0,0 @@
-#![feature(custom_attribute, custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-#[derive(Serialize, Deserialize)]
-struct S {
-    #[serde(rename(serialize="x"))]
-    #[serde(rename(serialize="y"))] //~ ERROR buldternua
-    #[serde(rename(deserialize="y"))] // ok
-    #[serde(rename="y")] // error
-    z: i32,
-}
-
-fn main() {}