1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/nll/relate_tys/issue-48071.rs b/tests/ui/nll/relate_tys/issue-48071.rs
new file mode 100644
index 000000000..73361a0d3
--- /dev/null
+++ b/tests/ui/nll/relate_tys/issue-48071.rs
@@ -0,0 +1,24 @@
+// Regression test for #48071. This test used to ICE because -- in
+// the leak-check -- it would pass since we knew that the return type
+// was `'static`, and hence `'static: 'a` was legal even for a
+// placeholder region, but in NLL land it would fail because we had
+// rewritten `'static` to a region variable.
+//
+// check-pass
+
+trait Foo {
+    fn foo(&self) { }
+}
+
+impl Foo for () {
+}
+
+type MakeFooFn = for<'a> fn(&'a u8) -> Box<dyn Foo + 'a>;
+
+fn make_foo(x: &u8) -> Box<dyn Foo + 'static> {
+    Box::new(())
+}
+
+fn main() {
+    let x: MakeFooFn = make_foo as MakeFooFn;
+}