1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/async-await/unused-lifetime.rs b/src/test/ui/async-await/unused-lifetime.rs
new file mode 100644
index 000000000..6cfd36ba9
--- /dev/null
+++ b/src/test/ui/async-await/unused-lifetime.rs
@@ -0,0 +1,39 @@
+// Check "unused_lifetimes" lint on both async and sync functions
+// Both cases should be diagnosed the same way.
+
+// edition:2018
+
+#![deny(unused_lifetimes)]
+
+async fn async_wrong_without_args<'a>() {} //~ ERROR lifetime parameter `'a` never used
+
+async fn async_wrong_1_lifetime<'a>(_: &i32) {} //~ ERROR lifetime parameter `'a` never used
+
+async fn async_wrong_2_lifetimes<'a, 'b>(_: &'a i32, _: &i32) {} //~ ERROR lifetime parameter `'b` never used
+
+async fn async_right_1_lifetime<'a>(_: &'a i32) {}
+
+async fn async_right_2_lifetimes<'a, 'b>(_: &'a i32, _: &'b i32) {}
+
+async fn async_right_trait_bound_lifetime<'a, I>(_: I)
+where
+    I: Iterator<Item = &'a i32>
+{}
+
+fn wrong_without_args<'a>() {} //~ ERROR lifetime parameter `'a` never used
+
+fn wrong_1_lifetime<'a>(_: &i32) {} //~ ERROR lifetime parameter `'a` never used
+
+fn wrong_2_lifetimes<'a, 'b>(_: &'a i32, _: &i32) {} //~ ERROR lifetime parameter `'b` never used
+
+fn right_1_lifetime<'a>(_: &'a i32) {}
+
+fn right_2_lifetimes<'a, 'b>(_: &'a i32, _: &'b i32) {}
+
+fn right_trait_bound_lifetime<'a, I>(_: I)
+where
+    I: Iterator<Item = &'a i32>
+{}
+
+
+fn main() {}