1 files changed, 8 insertions, 0 deletions
diff --git a/third_party/rust/anyhow/tests/ui/chained-comparison.rs b/third_party/rust/anyhow/tests/ui/chained-comparison.rs
new file mode 100644
index 0000000000..4521b51c8c
--- /dev/null
+++ b/third_party/rust/anyhow/tests/ui/chained-comparison.rs
@@ -0,0 +1,8 @@
+use anyhow::{ensure, Result};
+
+fn main() -> Result<()> {
+    // `ensure!` must not partition this into `(false) == (false == true)`
+    // because Rust doesn't ordinarily allow this form of expression.
+    ensure!(false == false == true);
+    Ok(())
+}