Detect incorrect remote type without getter

test_suite/tests/compile-fail/remote/wrong_ser.rs

@@ -0,0 +1,16 @@
+#[macro_use]
+extern crate serde_derive;
+
+mod remote {
+    pub struct S {
+        pub a: u16,
+    }
+}
+
+#[derive(Serialize)] //~ ERROR: mismatched types
+#[serde(remote = "remote::S")]
+struct S {
+    a: u8, //~^^^ expected u8, found u16
+}
+
+fn main() {}