1 files changed, 64 insertions, 0 deletions
diff --git a/src/test/ui/lint/lint-unused-variables.rs b/src/test/ui/lint/lint-unused-variables.rs
new file mode 100644
index 00000000000..a1660d23511
--- /dev/null
+++ b/src/test/ui/lint/lint-unused-variables.rs
@@ -0,0 +1,64 @@
+// compile-flags: --cfg something
+// edition:2018
+
+#![feature(async_await, async_closure, param_attrs)]
+#![deny(unused_variables)]
+
+async fn foo_async(
+    a: i32,
+    //~^ ERROR unused variable: `a`
+    #[allow(unused_variables)] b: i32,
+) {}
+fn foo(
+    #[allow(unused_variables)] a: i32,
+    b: i32,
+    //~^ ERROR unused variable: `b`
+) {}
+
+struct RefStruct {}
+impl RefStruct {
+    async fn bar_async(
+        &self,
+        a: i32,
+        //~^ ERROR unused variable: `a`
+        #[allow(unused_variables)] b: i32,
+    ) {}
+    fn bar(
+        &self,
+        #[allow(unused_variables)] a: i32,
+        b: i32,
+        //~^ ERROR unused variable: `b`
+    ) {}
+}
+trait RefTrait {
+    fn bar(
+        &self,
+        #[allow(unused_variables)] a: i32,
+        b: i32,
+        //~^ ERROR unused variable: `b`
+    ) {}
+}
+impl RefTrait for RefStruct {
+    fn bar(
+        &self,
+        #[allow(unused_variables)] a: i32,
+        b: i32,
+        //~^ ERROR unused variable: `b`
+    ) {}
+}
+
+fn main() {
+    let _: fn(_, _) = foo;
+    let a = async move |
+        a: i32,
+        //~^ ERROR unused variable: `a`
+        #[allow(unused_variables)] b: i32,
+    | {};
+    let b = |
+        #[allow(unused_variables)] a: i32,
+        b: i32,
+        //~^ ERROR unused variable: `b`
+    | {};
+    let _ = a(1, 2);
+    let _ = b(1, 2);
+}