1 files changed, 11 insertions, 0 deletions
diff --git a/third_party/rust/anyhow/tests/ui/must-use.rs b/third_party/rust/anyhow/tests/ui/must-use.rs
new file mode 100644
index 0000000000..ea4e58f55e
--- /dev/null
+++ b/third_party/rust/anyhow/tests/ui/must-use.rs
@@ -0,0 +1,11 @@
+#![deny(unused_must_use)]
+
+use anyhow::anyhow;
+
+fn main() -> anyhow::Result<()> {
+    if true {
+        // meant to write bail!
+        anyhow!("it failed");
+    }
+    Ok(())
+}