Nest the impl Trait existential item inside the return type

src/test/ui/impl-trait/deprecated_annotation.rs

@@ -0,0 +1,19 @@
+// compile-pass
+
+#![deny(warnings)]
+
+#[deprecated]
+trait Deprecated {}
+
+#[deprecated]
+struct DeprecatedTy;
+
+#[allow(deprecated)]
+impl Deprecated for DeprecatedTy {}
+
+#[allow(deprecated)]
+fn foo() -> impl Deprecated { DeprecatedTy }
+
+fn main() {
+    foo();
+}

src/test/ui/privacy/private-type-in-interface.rs

@@ -35,8 +35,6 @@ type A = <m::Alias as m::Trait>::X; //~ ERROR type `m::Priv` is private
 trait Tr2<T> {}
 impl<T> Tr2<T> for u8 {}
 fn g() -> impl Tr2<m::Alias> { 0 } //~ ERROR type `m::Priv` is private
-//~^ ERROR type `m::Priv` is private
 fn g_ext() -> impl Tr2<ext::Alias> { 0 } //~ ERROR type `ext::Priv` is private
-//~^ ERROR type `ext::Priv` is private
 
 fn main() {}

src/test/ui/privacy/private-type-in-interface.stderr

@@ -46,23 +46,11 @@ error: type `m::Priv` is private
 LL | fn g() -> impl Tr2<m::Alias> { 0 } //~ ERROR type `m::Priv` is private
    |           ^^^^^^^^^^^^^^^^^^
 
-error: type `m::Priv` is private
-  --> $DIR/private-type-in-interface.rs:37:16
-   |
-LL | fn g() -> impl Tr2<m::Alias> { 0 } //~ ERROR type `m::Priv` is private
-   |                ^^^^^^^^^^^^^
-
 error: type `ext::Priv` is private
-  --> $DIR/private-type-in-interface.rs:39:15
+  --> $DIR/private-type-in-interface.rs:38:15
    |
 LL | fn g_ext() -> impl Tr2<ext::Alias> { 0 } //~ ERROR type `ext::Priv` is private
    |               ^^^^^^^^^^^^^^^^^^^^
 
-error: type `ext::Priv` is private
-  --> $DIR/private-type-in-interface.rs:39:20
-   |
-LL | fn g_ext() -> impl Tr2<ext::Alias> { 0 } //~ ERROR type `ext::Priv` is private
-   |                    ^^^^^^^^^^^^^^^
-
-error: aborting due to 11 previous errors
+error: aborting due to 9 previous errors