1 files changed, 9 insertions, 0 deletions
diff --git a/third_party/rust/thiserror/tests/ui/union.rs b/third_party/rust/thiserror/tests/ui/union.rs
new file mode 100644
index 0000000000..cd6a9346d5
--- /dev/null
+++ b/third_party/rust/thiserror/tests/ui/union.rs
@@ -0,0 +1,9 @@
+use thiserror::Error;
+
+#[derive(Error)]
+pub union U {
+    msg: &'static str,
+    num: usize,
+}
+
+fn main() {}