Ui tests with compile_error resolved at call site

test_suite/tests/ui/with-variant/skip_ser_struct_field.stderr

@@ -1,6 +1,9 @@
 error: variant `Struct` cannot have both #[serde(serialize_with)] and a field `f1` marked with #[serde(skip_serializing)]
   --> tests/ui/with-variant/skip_ser_struct_field.rs:5:5
    |
+3  |   #[derive(Serialize)]
+   |            --------- in this derive macro expansion
+4  |   enum Enum {
 5  | /     #[serde(serialize_with = "serialize_some_other_variant")]
 6  | |     Struct {
 7  | |         #[serde(skip_serializing)]
@@ -8,3 +11,5 @@ error: variant `Struct` cannot have both #[serde(serialize_with)] and a field `f
 9  | |         f2: u8,
 10 | |     },
    | |_____^
+   |
+   = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)