#3298: reduce --numbered bug (#3354)

crates/nu-command/tests/commands/reduce.rs

@@ -61,6 +61,21 @@ fn reduce_numbered_example() {
     assert_eq!(actual.out, "1");
 }
 
+#[test]
+fn reduce_numbered_integer_addition_example() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo [1 2 3 4]
+        | reduce -n {= $acc.item + $it.item }
+        | get item
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "10");
+}
+
 #[test]
 fn folding_with_tables() {
     let actual = nu!(