1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/single-use-lifetime/one-use-in-inherent-impl-header.rs b/src/test/ui/single-use-lifetime/one-use-in-inherent-impl-header.rs
new file mode 100644
index 000000000..64f1c9118
--- /dev/null
+++ b/src/test/ui/single-use-lifetime/one-use-in-inherent-impl-header.rs
@@ -0,0 +1,22 @@
+#![deny(single_use_lifetimes)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+// Test that we DO warn for a lifetime used only once in an impl, and that we
+// don't warn for the anonymous lifetime.
+
+struct Foo<'f> {
+    data: &'f u32
+}
+
+impl<'f> Foo<'f> { //~ ERROR `'f` only used once
+    fn inherent_a(&self) {
+    }
+}
+
+impl Foo<'_> {
+    fn inherent_b(&self) {}
+}
+
+
+fn main() { }