Upgrade rust/crates/pin-project to 1.0.1

* Add missing patches, needed by external_updater

Test: make
Test: tools/external_updater/updater.sh update --refresh --keep_date rust/crates/pin-project
Change-Id: I3738561830ce97903036460713eb3b74700b889e

7 files changed, 220 insertions, 268 deletions

diff --git a/examples/README.md b/examples/README.md
index 94f49b5..3f0d87e 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -14,22 +14,25 @@
 
   * [example](unsafe_unpin.rs)
   * [generated code](unsafe_unpin-expanded.rs)
-  * [`UnsafeUnpin` documentation](https://docs.rs/pin-project/0.4/pin_project/trait.UnsafeUnpin.html)
+  * [`UnsafeUnpin` documentation](https://docs.rs/pin-project/1/pin_project/trait.UnsafeUnpin.html)
 
 ### Manual implementation of `Drop` by `#[pinned_drop]`
 
   * [example](pinned_drop.rs)
   * [generated code](pinned_drop-expanded.rs)
-  * [`#[pinned_drop]` documentation](https://docs.rs/pin-project/0.4/pin_project/attr.pinned_drop.html)
+  * [`#[pinned_drop]` documentation](https://docs.rs/pin-project/1/pin_project/attr.pinned_drop.html)
 
 ### `project_replace()` method
 
   * [example](project_replace.rs)
   * [generated code](project_replace-expanded.rs)
-  * [`project_replace()` documentation](https://docs.rs/pin-project/0.4/pin_project/attr.pin_project.html#project_replace)
+  * [`project_replace()` documentation](https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#project_replace)
 
 ### Ensure `!Unpin` by `#[pin_project(!Unpin)]`
 
   * [example](not_unpin.rs)
   * [generated code](not_unpin-expanded.rs)
-  * [`!Unpin` documentation](https://docs.rs/pin-project/0.4/pin_project/attr.pin_project.html#unpin)
+  * [`!Unpin` documentation](https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#unpin)
+
+Note: These generated code examples are the little simplified version of the actual generated code.
+See [expansion tests](../tests/expand/README.md) if you want to see the exact version of the actual generated code.
diff --git a/examples/enum-default-expanded.rs b/examples/enum-default-expanded.rs
index cea3ae5..f234b51 100644
--- a/examples/enum-default-expanded.rs
+++ b/examples/enum-default-expanded.rs
@@ -14,20 +14,17 @@
 // fn main() {}
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::just_underscores_and_digits)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes, clippy::just_underscores_and_digits)]
 
 use pin_project::pin_project;
 
+// #[pin_project(project = EnumProj)]
 enum Enum<T, U> {
     Pinned(/* #[pin] */ T),
     Unpinned(U),
 }
 
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
 enum EnumProj<'pin, T, U>
 where
     Enum<T, U>: 'pin,
@@ -35,23 +32,13 @@ where
     Pinned(::pin_project::__private::Pin<&'pin mut (T)>),
     Unpinned(&'pin mut (U)),
 }
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-enum __EnumProjectionRef<'pin, T, U>
-where
-    Enum<T, U>: 'pin,
-{
-    Pinned(::pin_project::__private::Pin<&'pin (T)>),
-    Unpinned(&'pin (U)),
-}
 
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    // When `#[pin_project]` is used on enums, only named projection types and
+    // methods are generated because there is no way to access variants of
+    // projected types without naming it.
+    // (When `#[pin_project]` is used on structs, both methods are always generated.)
+
     impl<T, U> Enum<T, U> {
         fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -65,18 +52,6 @@ const _: () = {
                 }
             }
         }
-        fn project_ref<'pin>(
-            self: ::pin_project::__private::Pin<&'pin Self>,
-        ) -> __EnumProjectionRef<'pin, T, U> {
-            unsafe {
-                match self.get_ref() {
-                    Enum::Pinned(_0) => __EnumProjectionRef::Pinned(
-                        ::pin_project::__private::Pin::new_unchecked(_0),
-                    ),
-                    Enum::Unpinned(_0) => __EnumProjectionRef::Unpinned(_0),
-                }
-            }
-        }
     }
 
     // Automatically create the appropriate conditional `Unpin` implementation.
@@ -94,15 +69,23 @@ const _: () = {
         __Enum<'pin, T, U>: ::pin_project::__private::Unpin
     {
     }
-    unsafe impl<T, U> ::pin_project::UnsafeUnpin for Enum<T, U> {}
+    // A dummy impl of `UnsafeUnpin`, to ensure that the user cannot implement it.
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> ::pin_project::UnsafeUnpin for Enum<T, U> where
+        __Enum<'pin, T, U>: ::pin_project::__private::Unpin
+    {
+    }
 
     // Ensure that enum does not implement `Drop`.
     //
     // See ./struct-default-expanded.rs for details.
     trait EnumMustNotImplDrop {}
-    #[allow(clippy::drop_bounds)]
+    #[allow(clippy::drop_bounds, drop_bounds)]
     impl<T: ::pin_project::__private::Drop> EnumMustNotImplDrop for T {}
     impl<T, U> EnumMustNotImplDrop for Enum<T, U> {}
+    // A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
+    // write a non-functional `PinnedDrop` impls.
+    #[doc(hidden)]
     impl<T, U> ::pin_project::__private::PinnedDrop for Enum<T, U> {
         unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
     }
diff --git a/examples/not_unpin-expanded.rs b/examples/not_unpin-expanded.rs
index fdfe5a2..aa5209d 100644
--- a/examples/not_unpin-expanded.rs
+++ b/examples/not_unpin-expanded.rs
@@ -18,46 +18,34 @@
 // }
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::no_effect)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes)]
 
 use pin_project::pin_project;
 
+// #[pin_project(!Unpin)]
 pub struct Struct<T, U> {
     // #[pin]
     pinned: T,
     unpinned: U,
 }
 
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjection<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
-    unpinned: &'pin mut (U),
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjectionRef<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin (T)>,
-    unpinned: &'pin (U),
-}
-
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    pub(crate) struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    pub(crate) struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+
     impl<T, U> Struct<T, U> {
         pub(crate) fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -83,6 +71,17 @@ const _: () = {
         }
     }
 
+    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
+    // struct.
+    //
+    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
+    // for details.
+    #[forbid(safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+
     // Create `Unpin` impl that has trivial `Unpin` bounds.
     //
     // See https://github.com/taiki-e/pin-project/issues/102#issuecomment-540472282
@@ -98,29 +97,26 @@ const _: () = {
     // impls, we emit one ourselves. If the user ends up writing an `UnsafeUnpin`
     // impl, they'll get a "conflicting implementations of trait" error when
     // coherence checks are run.
-    unsafe impl<T, U> ::pin_project::UnsafeUnpin for Struct<T, U> {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> ::pin_project::UnsafeUnpin for Struct<T, U> where
+        ::pin_project::__private::Wrapper<'pin, ::pin_project::__private::PhantomPinned>:
+            ::pin_project::__private::Unpin
+    {
+    }
 
     // Ensure that struct does not implement `Drop`.
     //
     // See ./struct-default-expanded.rs for details.
     trait StructMustNotImplDrop {}
-    #[allow(clippy::drop_bounds)]
+    #[allow(clippy::drop_bounds, drop_bounds)]
     impl<T: ::pin_project::__private::Drop> StructMustNotImplDrop for T {}
     impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    // A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
+    // write a non-functional `PinnedDrop` impls.
+    #[doc(hidden)]
     impl<T, U> ::pin_project::__private::PinnedDrop for Struct<T, U> {
         unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
     }
-
-    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
-    // struct.
-    //
-    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
-    // for details.
-    #[deny(safe_packed_borrows)]
-    fn __assert_not_repr_packed<T, U>(val: &Struct<T, U>) {
-        &val.pinned;
-        &val.unpinned;
-    }
 };
 
 fn main() {
diff --git a/examples/pinned_drop-expanded.rs b/examples/pinned_drop-expanded.rs
index 8f295e9..ad22c0b 100644
--- a/examples/pinned_drop-expanded.rs
+++ b/examples/pinned_drop-expanded.rs
@@ -21,47 +21,35 @@
 // fn main() {}
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::no_effect)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes)]
 
 use pin_project::{pin_project, pinned_drop};
 use std::pin::Pin;
 
+// #[pin_project(PinnedDrop)]
 pub struct Struct<'a, T> {
     was_dropped: &'a mut bool,
     // #[pin]
     field: T,
 }
 
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjection<'pin, 'a, T>
-where
-    Struct<'a, T>: 'pin,
-{
-    was_dropped: &'pin mut (&'a mut bool),
-    field: ::pin_project::__private::Pin<&'pin mut (T)>,
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjectionRef<'pin, 'a, T>
-where
-    Struct<'a, T>: 'pin,
-{
-    was_dropped: &'pin (&'a mut bool),
-    field: ::pin_project::__private::Pin<&'pin (T)>,
-}
-
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    pub(crate) struct __StructProjection<'pin, 'a, T>
+    where
+        Struct<'a, T>: 'pin,
+    {
+        was_dropped: &'pin mut (&'a mut bool),
+        field: ::pin_project::__private::Pin<&'pin mut (T)>,
+    }
+    pub(crate) struct __StructProjectionRef<'pin, 'a, T>
+    where
+        Struct<'a, T>: 'pin,
+    {
+        was_dropped: &'pin (&'a mut bool),
+        field: ::pin_project::__private::Pin<&'pin (T)>,
+    }
+
     impl<'a, T> Struct<'a, T> {
         pub(crate) fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -87,6 +75,17 @@ const _: () = {
         }
     }
 
+    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
+    // struct.
+    //
+    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
+    // for details.
+    #[forbid(safe_packed_borrows)]
+    fn __assert_not_repr_packed<'a, T>(this: &Struct<'a, T>) {
+        let _ = &this.was_dropped;
+        let _ = &this.field;
+    }
+
     impl<'a, T> ::pin_project::__private::Drop for Struct<'a, T> {
         fn drop(&mut self) {
             // Safety - we're in 'drop', so we know that 'self' will
@@ -114,17 +113,11 @@ const _: () = {
         __Struct<'pin, 'a, T>: ::pin_project::__private::Unpin
     {
     }
-    unsafe impl<'a, T> ::pin_project::UnsafeUnpin for Struct<'a, T> {}
-
-    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
-    // struct.
-    //
-    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
-    // for details.
-    #[deny(safe_packed_borrows)]
-    fn __assert_not_repr_packed<'a, T>(val: &Struct<'a, T>) {
-        &val.was_dropped;
-        &val.field;
+    // A dummy impl of `UnsafeUnpin`, to ensure that the user cannot implement it.
+    #[doc(hidden)]
+    unsafe impl<'pin, 'a, T> ::pin_project::UnsafeUnpin for Struct<'a, T> where
+        __Struct<'pin, 'a, T>: ::pin_project::__private::Unpin
+    {
     }
 };
 
diff --git a/examples/project_replace-expanded.rs b/examples/project_replace-expanded.rs
index 16f47b7..ec00d41 100644
--- a/examples/project_replace-expanded.rs
+++ b/examples/project_replace-expanded.rs
@@ -15,54 +15,38 @@
 // fn main() {}
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::no_effect)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes)]
 
 use pin_project::pin_project;
 
+// #[pin_project(project_replace)]
 struct Struct<T, U> {
     // #[pin]
     pinned: T,
     unpinned: U,
 }
 
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
-struct __StructProjection<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
-    unpinned: &'pin mut (U),
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-struct __StructProjectionRef<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin (T)>,
-    unpinned: &'pin (U),
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(unreachable_pub)]
-#[allow(single_use_lifetimes)]
-struct __StructProjectionOwned<T, U> {
-    pinned: ::pin_project::__private::PhantomData<T>,
-    unpinned: U,
-}
-
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    struct __StructProjectionOwned<T, U> {
+        pinned: ::pin_project::__private::PhantomData<T>,
+        unpinned: U,
+    }
+
     impl<T, U> Struct<T, U> {
         fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -122,6 +106,17 @@ const _: () = {
         }
     }
 
+    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
+    // struct.
+    //
+    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
+    // for details.
+    #[forbid(safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+
     // Automatically create the appropriate conditional `Unpin` implementation.
     //
     // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/53.
@@ -137,29 +132,26 @@ const _: () = {
         __Struct<'pin, T, U>: ::pin_project::__private::Unpin
     {
     }
-    unsafe impl<T, U> ::pin_project::UnsafeUnpin for Struct<T, U> {}
+    // A dummy impl of `UnsafeUnpin`, to ensure that the user cannot implement it.
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> ::pin_project::UnsafeUnpin for Struct<T, U> where
+        __Struct<'pin, T, U>: ::pin_project::__private::Unpin
+    {
+    }
 
     // Ensure that struct does not implement `Drop`.
     //
     // See ./struct-default-expanded.rs for details.
     trait StructMustNotImplDrop {}
-    #[allow(clippy::drop_bounds)]
+    #[allow(clippy::drop_bounds, drop_bounds)]
     impl<T: ::pin_project::__private::Drop> StructMustNotImplDrop for T {}
     impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    // A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
+    // write a non-functional `PinnedDrop` impls.
+    #[doc(hidden)]
     impl<T, U> ::pin_project::__private::PinnedDrop for Struct<T, U> {
         unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
     }
-
-    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
-    // struct.
-    //
-    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
-    // for details.
-    #[deny(safe_packed_borrows)]
-    fn __assert_not_repr_packed<T, U>(val: &Struct<T, U>) {
-        &val.pinned;
-        &val.unpinned;
-    }
 };
 
 fn main() {}
diff --git a/examples/struct-default-expanded.rs b/examples/struct-default-expanded.rs
index ff160ce..3d0e4ab 100644
--- a/examples/struct-default-expanded.rs
+++ b/examples/struct-default-expanded.rs
@@ -15,46 +15,34 @@
 // fn main() {}
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::no_effect)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes)]
 
 use pin_project::pin_project;
 
+// #[pin_project]
 struct Struct<T, U> {
     // #[pin]
     pinned: T,
     unpinned: U,
 }
 
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
-struct __StructProjection<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
-    unpinned: &'pin mut (U),
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-struct __StructProjectionRef<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin (T)>,
-    unpinned: &'pin (U),
-}
-
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+
     impl<T, U> Struct<T, U> {
         fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -80,6 +68,26 @@ const _: () = {
         }
     }
 
+    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
+    // struct.
+    //
+    // Taking a reference to a packed field is unsafe, and applying
+    // #[forbid(safe_packed_borrows)] makes sure that doing this without
+    // an 'unsafe' block (which we deliberately do not generate)
+    // is a hard error.
+    //
+    // If the struct ends up having #[repr(packed)] applied somehow,
+    // this will generate an (unfriendly) error message. Under all reasonable
+    // circumstances, we'll detect the #[repr(packed)] attribute, and generate
+    // a much nicer error above.
+    //
+    // See https://github.com/taiki-e/pin-project/pull/34 for more details.
+    #[forbid(safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+
     // Automatically create the appropriate conditional `Unpin` implementation.
     //
     // Basically this is equivalent to the following code:
@@ -123,7 +131,11 @@ const _: () = {
     // impls, we emit one ourselves. If the user ends up writing an `UnsafeUnpin`
     // impl, they'll get a "conflicting implementations of trait" error when
     // coherence checks are run.
-    unsafe impl<T, U> ::pin_project::UnsafeUnpin for Struct<T, U> {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> ::pin_project::UnsafeUnpin for Struct<T, U> where
+        __Struct<'pin, T, U>: ::pin_project::__private::Unpin
+    {
+    }
 
     // Ensure that struct does not implement `Drop`.
     //
@@ -131,34 +143,15 @@ const _: () = {
     // then apply to your type, causing a compile-time error due to
     // the conflict with the second impl.
     trait StructMustNotImplDrop {}
-    #[allow(clippy::drop_bounds)]
+    #[allow(clippy::drop_bounds, drop_bounds)]
     impl<T: ::pin_project::__private::Drop> StructMustNotImplDrop for T {}
     impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
     // A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
     // write a non-functional `PinnedDrop` impls.
+    #[doc(hidden)]
     impl<T, U> ::pin_project::__private::PinnedDrop for Struct<T, U> {
         unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
     }
-
-    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
-    // struct.
-    //
-    // Taking a reference to a packed field is unsafe, and applying
-    // #[deny(safe_packed_borrows)] makes sure that doing this without
-    // an 'unsafe' block (which we deliberately do not generate)
-    // is a hard error.
-    //
-    // If the struct ends up having #[repr(packed)] applied somehow,
-    // this will generate an (unfriendly) error message. Under all reasonable
-    // circumstances, we'll detect the #[repr(packed)] attribute, and generate
-    // a much nicer error above.
-    //
-    // See https://github.com/taiki-e/pin-project/pull/34 for more details.
-    #[deny(safe_packed_borrows)]
-    fn __assert_not_repr_packed<T, U>(val: &Struct<T, U>) {
-        &val.pinned;
-        &val.unpinned;
-    }
 };
 
 fn main() {}
diff --git a/examples/unsafe_unpin-expanded.rs b/examples/unsafe_unpin-expanded.rs
index e55b740..2ea1f37 100644
--- a/examples/unsafe_unpin-expanded.rs
+++ b/examples/unsafe_unpin-expanded.rs
@@ -17,46 +17,34 @@
 // fn main() {}
 // ```
 
-#![allow(dead_code, unused_imports, unused_parens)]
-#![allow(clippy::no_effect)]
+#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
+#![allow(clippy::needless_lifetimes)]
 
 use pin_project::{pin_project, UnsafeUnpin};
 
+// #[pin_project(UnsafeUnpin)]
 pub struct Struct<T, U> {
     // #[pin]
     pinned: T,
     unpinned: U,
 }
 
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::mut_mut)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjection<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
-    unpinned: &'pin mut (U),
-}
-#[doc(hidden)]
-#[allow(dead_code)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::type_repetition_in_bounds)]
-pub(crate) struct __StructProjectionRef<'pin, T, U>
-where
-    Struct<T, U>: 'pin,
-{
-    pinned: ::pin_project::__private::Pin<&'pin (T)>,
-    unpinned: &'pin (U),
-}
-
-#[doc(hidden)]
-#[allow(non_upper_case_globals)]
-#[allow(single_use_lifetimes)]
-#[allow(clippy::used_underscore_binding)]
 const _: () = {
+    pub(crate) struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    pub(crate) struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+
     impl<T, U> Struct<T, U> {
         pub(crate) fn project<'pin>(
             self: ::pin_project::__private::Pin<&'pin mut Self>,
@@ -82,6 +70,18 @@ const _: () = {
         }
     }
 
+    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
+    // struct.
+    //
+    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
+    // for details.
+    #[forbid(safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+
+    // Implement `Unpin` via `UnsafeUnpin`.
     impl<'pin, T, U> ::pin_project::__private::Unpin for Struct<T, U> where
         ::pin_project::__private::Wrapper<'pin, Self>: ::pin_project::UnsafeUnpin
     {
@@ -91,23 +91,15 @@ const _: () = {
     //
     // See ./struct-default-expanded.rs for details.
     trait StructMustNotImplDrop {}
-    #[allow(clippy::drop_bounds)]
+    #[allow(clippy::drop_bounds, drop_bounds)]
     impl<T: ::pin_project::__private::Drop> StructMustNotImplDrop for T {}
     impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    // A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
+    // write a non-functional `PinnedDrop` impls.
+    #[doc(hidden)]
     impl<T, U> ::pin_project::__private::PinnedDrop for Struct<T, U> {
         unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
     }
-
-    // Ensure that it's impossible to use pin projections on a #[repr(packed)]
-    // struct.
-    //
-    // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/34
-    // for details.
-    #[deny(safe_packed_borrows)]
-    fn __assert_not_repr_packed<T, U>(val: &Struct<T, U>) {
-        &val.pinned;
-        &val.unpinned;
-    }
 };
 
 unsafe impl<T: Unpin, U> UnsafeUnpin for Struct<T, U> {}