1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/closure_args.rs b/src/test/ui/type-alias-impl-trait/closure_args.rs
new file mode 100644
index 000000000..c5e7af81d
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/closure_args.rs
@@ -0,0 +1,16 @@
+// check-pass
+
+// regression test for https://github.com/rust-lang/rust/issues/100800
+
+#![feature(type_alias_impl_trait)]
+
+trait Anything {}
+impl<T> Anything for T {}
+type Input = impl Anything;
+fn run<F: FnOnce(Input) -> ()>(f: F, i: Input) {
+    f(i);
+}
+
+fn main() {
+    run(|x: u32| {println!("{x}");}, 0);
+}