1 files changed, 60 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/normalize-hidden-types.rs b/tests/ui/type-alias-impl-trait/normalize-hidden-types.rs
new file mode 100644
index 000000000..8d8054644
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/normalize-hidden-types.rs
@@ -0,0 +1,60 @@
+// Regression test for #112691
+//
+// revisions: current next
+// [next] compile-flags: -Ztrait-solver=next
+// [next] check-pass
+// [current]: known-bug: #112691
+
+#![feature(type_alias_impl_trait)]
+
+trait Trait {
+    type Gat<'lt>;
+}
+
+impl Trait for u8 {
+    type Gat<'lt> = ();
+}
+
+fn dyn_hoops<T: Trait>(_: T) -> *const dyn FnOnce(T::Gat<'_>) {
+    loop {}
+}
+
+mod typeof_1 {
+    use super::*;
+    type Opaque = impl Sized;
+    fn define() -> Opaque {
+        //[current]~^ ERROR concrete type differs
+        dyn_hoops::<_>(0)
+    }
+}
+
+mod typeof_2 {
+    use super::*;
+    type Opaque = impl Sized;
+    fn define_1() -> Opaque { dyn_hoops::<_>(0) }
+    //[current]~^ ERROR concrete type differs
+    fn define_2() -> Opaque { dyn_hoops::<u8>(0) }
+}
+
+mod typeck {
+    use super::*;
+    type Opaque = impl Sized;
+    fn define() -> Option<Opaque> {
+        let _: Opaque = dyn_hoops::<_>(0);
+        let _: Opaque = dyn_hoops::<u8>(0);
+        //[current]~^ ERROR mismatched types
+        None
+    }
+}
+
+mod borrowck {
+    use super::*;
+    type Opaque = impl Sized;
+    fn define() -> Option<Opaque> {
+        let _: Opaque = dyn_hoops::<_>(0);
+        //[current]~^ ERROR concrete type differs
+        None
+    }
+}
+
+fn main() {}