1 files changed, 15 insertions, 0 deletions
diff --git a/third_party/rust/thiserror/tests/ui/concat-display.rs b/third_party/rust/thiserror/tests/ui/concat-display.rs
new file mode 100644
index 0000000000..8b53cc0cd9
--- /dev/null
+++ b/third_party/rust/thiserror/tests/ui/concat-display.rs
@@ -0,0 +1,15 @@
+use thiserror::Error;
+
+macro_rules! error_type {
+    ($name:ident, $what:expr) => {
+        // Use #[error("invalid {}", $what)] instead.
+
+        #[derive(Error, Debug)]
+        #[error(concat!("invalid ", $what))]
+        pub struct $name;
+    };
+}
+
+error_type!(Error, "foo");
+
+fn main() {}