1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/unused-closure-argument.rs b/src/test/ui/suggestions/unused-closure-argument.rs
new file mode 100644
index 000000000..677003ebf
--- /dev/null
+++ b/src/test/ui/suggestions/unused-closure-argument.rs
@@ -0,0 +1,20 @@
+#![deny(unused_variables)]
+
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    let points = vec!(Point { x: 1, y: 2 }, Point { x: 3, y: 4 });
+
+    let _: i32 = points.iter()
+        .map(|Point { x, y }| y)
+        //~^ ERROR unused variable
+        .sum();
+
+    let _: i32 = points.iter()
+        .map(|x| 4)
+        //~^ ERROR unused variable
+        .sum();
+}