1 files changed, 10 insertions, 0 deletions
diff --git a/tests/ui/single-use-lifetime/zero-uses-in-impl.rs b/tests/ui/single-use-lifetime/zero-uses-in-impl.rs
new file mode 100644
index 00000000000..54803e1d2be
--- /dev/null
+++ b/tests/ui/single-use-lifetime/zero-uses-in-impl.rs
@@ -0,0 +1,10 @@
+// Test that we DO warn when lifetime name is not used at all.
+
+#![deny(unused_lifetimes)]
+#![allow(dead_code, unused_variables)]
+
+struct Foo {}
+
+impl<'a> Foo {} //~ ERROR `'a` never used
+
+fn main() {}