From c0296ee11b44e92a7f3bb6cd89dfe988ee511841 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Thu, 16 Mar 2023 00:15:54 -0700
Subject: [PATCH] Add ui test of malformed attribute containing expression

---
 test_suite/tests/ui/malformed/trailing_expr.rs     | 9 +++++++++
 test_suite/tests/ui/malformed/trailing_expr.stderr | 5 +++++
 2 files changed, 14 insertions(+)
 create mode 100644 test_suite/tests/ui/malformed/trailing_expr.rs
 create mode 100644 test_suite/tests/ui/malformed/trailing_expr.stderr

diff --git a/test_suite/tests/ui/malformed/trailing_expr.rs b/test_suite/tests/ui/malformed/trailing_expr.rs
new file mode 100644
index 000000000..f117e0231
--- /dev/null
+++ b/test_suite/tests/ui/malformed/trailing_expr.rs
@@ -0,0 +1,9 @@
+use serde_derive::Serialize;
+
+#[derive(Serialize)]
+struct S {
+    #[serde(skip_serializing_if, x.is_empty())]
+    x: Vec<()>,
+}
+
+fn main() {}
diff --git a/test_suite/tests/ui/malformed/trailing_expr.stderr b/test_suite/tests/ui/malformed/trailing_expr.stderr
new file mode 100644
index 000000000..d2a7ac975
--- /dev/null
+++ b/test_suite/tests/ui/malformed/trailing_expr.stderr
@@ -0,0 +1,5 @@
+error: expected `,`
+ --> tests/ui/malformed/trailing_expr.rs:5:35
+  |
+5 |     #[serde(skip_serializing_if, x.is_empty())]
+  |                                   ^