1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/polymorphization/lifetimes.rs b/tests/ui/polymorphization/lifetimes.rs
new file mode 100644
index 000000000..f26df4523
--- /dev/null
+++ b/tests/ui/polymorphization/lifetimes.rs
@@ -0,0 +1,25 @@
+// build-fail
+// compile-flags:-Zpolymorphize=on
+#![feature(rustc_attrs)]
+
+// This test checks that the polymorphization analysis doesn't break when the
+// function/closure doesn't just have generic parameters.
+
+// Function has an unused generic parameter.
+#[rustc_polymorphize_error]
+pub fn unused<'a, T>(_: &'a u32) {
+    //~^ ERROR item has unused generic parameters
+}
+
+#[rustc_polymorphize_error]
+pub fn used<'a, T: Default>(_: &'a u32) -> u32 {
+    let _: T = Default::default();
+    let add_one = |x: u32| x + 1;
+    //~^ ERROR item has unused generic parameters
+    add_one(3)
+}
+
+fn main() {
+    unused::<u32>(&3);
+    used::<u32>(&3);
+}