1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/binding/underscore-prefixed-function-argument.rs b/tests/ui/binding/underscore-prefixed-function-argument.rs
new file mode 100644
index 00000000000..e5b2ec1b5f0
--- /dev/null
+++ b/tests/ui/binding/underscore-prefixed-function-argument.rs
@@ -0,0 +1,15 @@
+//! Test that argument names starting with `_` are usable.
+
+//@ run-pass
+
+fn good(_a: &isize) {}
+
+fn called<F>(_f: F)
+where
+    F: FnOnce(&isize),
+{
+}
+
+pub fn main() {
+    called(good);
+}