diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c11a4ad..6cd7fae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,6 +79,9 @@
       - name: Install Rust
         run: |
           . ./ci/install-rust.sh
+      - name: Install rustfmt
+        run: |
+          . ./ci/install-component.sh rustfmt
       - name: Install cargo-expand
         run: |
           cargo install cargo-expand
diff --git a/Android.bp b/Android.bp
index c7fea1d..748477a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -12,7 +12,7 @@
 }
 
 // dependent_library ["feature_list"]
-//   pin-project-internal-0.4.22
+//   pin-project-internal-0.4.23
 //   proc-macro2-1.0.18 "default,proc-macro"
 //   quote-1.0.7 "default,proc-macro"
 //   syn-1.0.34 "clone-impls,default,derive,full,parsing,printing,proc-macro,quote,visit-mut"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d40af34..6ad7438 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@
 
 ## [Unreleased]
 
+## [0.4.23] - 2020-07-27
+
+* [Fix compile error with `?Sized` type parameters.][262]
+
+[262]: https://github.com/taiki-e/pin-project/pull/262
+
 ## [0.4.22] - 2020-06-14
 
 * Documentation improvements.
@@ -547,7 +553,8 @@
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/pin-project/compare/v0.4.22...HEAD
+[Unreleased]: https://github.com/taiki-e/pin-project/compare/v0.4.23...HEAD
+[0.4.23]: https://github.com/taiki-e/pin-project/compare/v0.4.22...v0.4.23
 [0.4.22]: https://github.com/taiki-e/pin-project/compare/v0.4.21...v0.4.22
 [0.4.21]: https://github.com/taiki-e/pin-project/compare/v0.4.20...v0.4.21
 [0.4.20]: https://github.com/taiki-e/pin-project/compare/v0.4.19...v0.4.20
diff --git a/Cargo.toml b/Cargo.toml
index bca571c..997d6fa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@
 [package]
 edition = "2018"
 name = "pin-project"
-version = "0.4.22"
+version = "0.4.23"
 authors = ["Taiki Endo <te316e89@gmail.com>"]
 description = "A crate for safe and ergonomic pin-projection.\n"
 homepage = "https://github.com/taiki-e/pin-project"
@@ -26,5 +26,5 @@
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
 [dependencies.pin-project-internal]
-version = "=0.4.22"
+version = "=0.4.23"
 default-features = false
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index 86f4cab..1f3ae36 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,6 +1,6 @@
 [package]
 name = "pin-project"
-version = "0.4.22"
+version = "0.4.23"
 authors = ["Taiki Endo <te316e89@gmail.com>"]
 edition = "2018"
 license = "Apache-2.0 OR MIT"
@@ -29,5 +29,5 @@
 ]
 
 [dependencies]
-pin-project-internal = { version = "=0.4.22", path = "pin-project-internal", default-features = false }
+pin-project-internal = { version = "=0.4.23", path = "pin-project-internal", default-features = false }
 
diff --git a/METADATA b/METADATA
index 50afc3f..f504890 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@
     type: GIT
     value: "https://github.com/taiki-e/pin-project"
   }
-  version: "0.4.22"
+  version: "0.4.23"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
     month: 7
-    day: 10
+    day: 27
   }
 }
diff --git a/ci.sh b/ci.sh
index 7f82c47..9c82699 100644
--- a/ci.sh
+++ b/ci.sh
@@ -15,7 +15,7 @@
 cargo +nightly clippy --all --all-features --all-targets
 
 echo "Running 'cargo test'"
-cargo +nightly test --all --all-features --exclude expandtest
+TRYBUILD=overwrite cargo +nightly test --all --all-features --exclude expandtest
 
 echo "Running 'cargo doc'"
 cargo +nightly doc --no-deps --all --all-features
diff --git a/examples/enum-default-expanded.rs b/examples/enum-default-expanded.rs
index 3e7cb3c..cea3ae5 100644
--- a/examples/enum-default-expanded.rs
+++ b/examples/enum-default-expanded.rs
@@ -84,7 +84,10 @@
     // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/53.
     // for details.
     struct __Enum<'pin, T, U> {
-        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<'pin, (T, U)>,
+        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<
+            'pin,
+            (::pin_project::__private::PhantomData<T>, ::pin_project::__private::PhantomData<U>),
+        >,
         __field0: T,
     }
     impl<'pin, T, U> ::pin_project::__private::Unpin for Enum<T, U> where
diff --git a/examples/project_replace-expanded.rs b/examples/project_replace-expanded.rs
index 661a0ac..16f47b7 100644
--- a/examples/project_replace-expanded.rs
+++ b/examples/project_replace-expanded.rs
@@ -127,7 +127,10 @@
     // See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/53.
     // for details.
     struct __Struct<'pin, T, U> {
-        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<'pin, (T, U)>,
+        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<
+            'pin,
+            (::pin_project::__private::PhantomData<T>, ::pin_project::__private::PhantomData<U>),
+        >,
         __field0: T,
     }
     impl<'pin, T, U> ::pin_project::__private::Unpin for Struct<T, U> where
diff --git a/examples/struct-default-expanded.rs b/examples/struct-default-expanded.rs
index 53f00c9..ff160ce 100644
--- a/examples/struct-default-expanded.rs
+++ b/examples/struct-default-expanded.rs
@@ -107,7 +107,10 @@
     //
     // See also https://github.com/taiki-e/pin-project/pull/53.
     struct __Struct<'pin, T, U> {
-        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<'pin, (T, U)>,
+        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<
+            'pin,
+            (::pin_project::__private::PhantomData<T>, ::pin_project::__private::PhantomData<U>),
+        >,
         __field0: T,
     }
     impl<'pin, T, U> ::pin_project::__private::Unpin for Struct<T, U> where
diff --git a/src/lib.rs b/src/lib.rs
index 1c4d453..61d90ea 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -36,7 +36,7 @@
 //! [struct-default-expanded]: https://github.com/taiki-e/pin-project/blob/master/examples/struct-default-expanded.rs
 
 #![no_std]
-#![doc(html_root_url = "https://docs.rs/pin-project/0.4.22")]
+#![doc(html_root_url = "https://docs.rs/pin-project/0.4.23")]
 #![doc(test(
     no_crate_inject,
     attr(deny(warnings, rust_2018_idioms, single_use_lifetimes), allow(dead_code))
@@ -46,8 +46,6 @@
 // mem::take and #[non_exhaustive] requires Rust 1.40
 #![allow(clippy::mem_replace_with_default, clippy::manual_non_exhaustive)]
 #![allow(clippy::needless_doctest_main)]
-// https://github.com/rust-lang/rust-clippy/issues/5704
-#![allow(clippy::unnested_or_patterns)]
 
 // ANDROID: Use std to allow building as a dylib.
 extern crate std;
@@ -227,7 +225,7 @@
     #[doc(hidden)]
     pub struct AlwaysUnpin<'a, T: ?Sized>(PhantomData<&'a ()>, PhantomData<T>);
 
-    impl<T: ?Sized> Unpin for AlwaysUnpin<'_, T> {}
+    impl<T> Unpin for AlwaysUnpin<'_, T> {}
 
     // This is an internal helper used to ensure a value is dropped.
     #[doc(hidden)]
diff --git a/tests/lint.rs b/tests/lint.rs
index 25cb649..e152930 100644
--- a/tests/lint.rs
+++ b/tests/lint.rs
@@ -1,13 +1,11 @@
 #![warn(rust_2018_idioms, single_use_lifetimes)]
 #![warn(future_incompatible, nonstandard_style, rust_2018_compatibility, unused)]
 #![warn(clippy::all, clippy::pedantic, clippy::nursery)]
-
-#[allow(unknown_lints)] // for old compilers
-#[warn(
+#![allow(unknown_lints)] // for old compilers
+#![warn(
     absolute_paths_not_starting_with_crate,
     anonymous_parameters,
     box_pointers,
-    confusable_idents,
     deprecated_in_future,
     elided_lifetimes_in_paths,
     explicit_outlives_requirements,
@@ -38,6 +36,9 @@
 // unused_crate_dependencies: unrelated
 // unsafe_code: checked in forbid_unsafe module
 // unsafe_block_in_unsafe_fn: unstable
+
+// Check interoperability with rustc and clippy lints.
+
 pub mod basic {
     include!("include/basic.rs");
 }
@@ -51,17 +52,23 @@
 pub mod clippy {
     use pin_project::pin_project;
 
+    #[rustversion::attr(before(1.37), allow(single_use_lifetimes))] // https://github.com/rust-lang/rust/issues/53738
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub struct MutMutStruct<'a, T, U> {
         #[pin]
         pub pinned: &'a mut T,
         pub unpinned: &'a mut U,
     }
 
+    #[rustversion::attr(before(1.37), allow(single_use_lifetimes))] // https://github.com/rust-lang/rust/issues/53738
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub struct MutMutTupleStruct<'a, T, U>(#[pin] &'a mut T, &'a mut U);
 
+    #[rustversion::attr(before(1.37), allow(single_use_lifetimes))] // https://github.com/rust-lang/rust/issues/53738
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub enum MutMutEnum<'a, T, U> {
         Struct {
             #[pin]
@@ -73,6 +80,7 @@
     }
 
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub struct TypeRepetitionInBoundsStruct<T, U>
     where
         Self: Sized,
@@ -83,11 +91,13 @@
     }
 
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub struct TypeRepetitionInBoundsTupleStruct<T, U>(#[pin] T, U)
     where
         Self: Sized;
 
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub enum TypeRepetitionInBoundsEnum<T, U>
     where
         Self: Sized,
@@ -102,6 +112,7 @@
     }
 
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub struct UsedUnderscoreBindingStruct<T, U> {
         #[pin]
         pub _pinned: T,
@@ -109,6 +120,7 @@
     }
 
     #[pin_project(project_replace)]
+    #[derive(Debug)]
     pub enum UsedUnderscoreBindingEnum<T, U> {
         Struct {
             #[pin]
@@ -118,7 +130,8 @@
     }
 }
 
-#[rustversion::attr(not(since(2020-06-12)), ignore)]
+#[allow(box_pointers)]
+#[rustversion::attr(not(nightly), ignore)]
 #[test]
 fn check_lint_list() {
     use std::{env, process::Command, str};
diff --git a/tests/lint.txt b/tests/lint.txt
index 5110d4b..4205786 100644
--- a/tests/lint.txt
+++ b/tests/lint.txt
@@ -13,7 +13,6 @@
                      absolute-paths-not-starting-with-crate  allow    fully qualified paths that start with a module name instead of `crate`, `self`, or an extern crate name
                                        anonymous-parameters  allow    detects anonymous parameters
                                                box-pointers  allow    use of owned (Box type) heap memory
-                                          confusable-idents  allow    detects visually confusable pairs between identifiers
                                        deprecated-in-future  allow    detects use of items that will be deprecated in a future version
                                   elided-lifetimes-in-paths  allow    hidden lifetime parameters in types are deprecated
                              explicit-outlives-requirements  allow    outlives requirements can be inferred
@@ -47,20 +46,25 @@
                                            asm-sub-register  warn     using only a subset of a register for inline asm inputs
                                          bare-trait-objects  warn     suggest using `dyn Trait` for trait objects
                                  bindings-with-variant-name  warn     detects pattern bindings with the same name as one of the matched variants
+                                       cenum-impl-drop-cast  warn     a C-like enum implementing Drop is cast
+                               clashing-extern-declarations  warn     detects when an extern fn has been declared with the same name but different types
                                        coherence-leak-check  warn     distinct impls distinguished only by the leak-check code
+                                          confusable-idents  warn     detects visually confusable pairs between identifiers
                                                   dead-code  warn     detect unused, unexported items
                                                  deprecated  warn     detects use of deprecated items
                           ellipsis-inclusive-range-patterns  warn     `...` range patterns are deprecated
                               exported-private-dependencies  warn     public interface leaks type from a private dependency
                      illegal-floating-point-literal-pattern  warn     floating-point literals cannot be used in patterns
                                             improper-ctypes  warn     proper use of libc types in foreign modules
+                                improper-ctypes-definitions  warn     proper use of libc types in foreign item definitions
                                         incomplete-features  warn     incomplete features that may function improperly in some or all cases
                                          inline-no-sanitize  warn     detects incompatible use of `#[inline(always)]` and `#[no_sanitize(...)]`
                           intra-doc-link-resolution-failure  warn     failures in resolving intra-doc link targets
-                                invalid-codeblock-attribute  warn     codeblock attribute looks a lot like a known one
+                               invalid-codeblock-attributes  warn     codeblock attribute looks a lot like a known one
                                               invalid-value  warn     an invalid value is being created (such as a NULL reference)
                                    irrefutable-let-patterns  warn     detects irrefutable patterns in if-let and while-let statements
                               late-bound-lifetime-arguments  warn     detects generic lifetime arguments in path segments with late bound lifetime parameters
+                                   mixed-script-confusables  warn     detects Unicode scripts whose mixed script confusables codepoints are solely used
                         mutable-borrow-reservation-conflict  warn     reservation of a two-phased borrow conflicts with other shared borrows
                                        non-camel-case-types  warn     types, variants, traits and type parameters should have camel case names
                                non-shorthand-field-patterns  warn     using `Struct { x: x }` instead of `Struct { x }` in a pattern
@@ -128,11 +132,11 @@
                        name  sub-lints
                        ----  ---------
                    warnings  all lints that are set to issue warnings
-        future-incompatible  keyword-idents, anonymous-parameters, illegal-floating-point-literal-pattern, private-in-public, pub-use-of-private-extern-crate, invalid-type-param-default, safe-packed-borrows, patterns-in-fns-without-body, missing-fragment-specifier, late-bound-lifetime-arguments, order-dependent-trait-objects, coherence-leak-check, tyvar-behind-raw-pointer, absolute-paths-not-starting-with-crate, unstable-name-collisions, where-clauses-object-safety, proc-macro-derive-resolution-fallback, macro-expanded-macro-exports-accessed-by-absolute-paths, ill-formed-attribute-input, conflicting-repr-hints, ambiguous-associated-items, mutable-borrow-reservation-conflict, indirect-structural-match, soft-unstable, array-into-iter
+        future-incompatible  keyword-idents, anonymous-parameters, illegal-floating-point-literal-pattern, private-in-public, pub-use-of-private-extern-crate, invalid-type-param-default, safe-packed-borrows, patterns-in-fns-without-body, missing-fragment-specifier, late-bound-lifetime-arguments, order-dependent-trait-objects, coherence-leak-check, tyvar-behind-raw-pointer, absolute-paths-not-starting-with-crate, unstable-name-collisions, where-clauses-object-safety, proc-macro-derive-resolution-fallback, macro-expanded-macro-exports-accessed-by-absolute-paths, ill-formed-attribute-input, conflicting-repr-hints, ambiguous-associated-items, mutable-borrow-reservation-conflict, indirect-structural-match, soft-unstable, cenum-impl-drop-cast, array-into-iter
           nonstandard-style  non-camel-case-types, non-snake-case, non-upper-case-globals
     rust-2018-compatibility  keyword-idents, anonymous-parameters, tyvar-behind-raw-pointer, absolute-paths-not-starting-with-crate
            rust-2018-idioms  bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements
-                    rustdoc  intra-doc-link-resolution-failure, invalid-codeblock-attribute, missing-doc-code-examples, private-doc-tests
+                    rustdoc  intra-doc-link-resolution-failure, invalid-codeblock-attributes, missing-doc-code-examples, private-doc-tests
                      unused  unused-imports, unused-variables, unused-assignments, dead-code, unused-mut, unreachable-code, unreachable-patterns, overlapping-patterns, unused-must-use, unused-unsafe, path-statements, unused-attributes, unused-macros, unused-allocation, unused-doc-comments, unused-extern-crates, unused-features, unused-labels, unused-parens, unused-braces, redundant-semicolons
 
 
diff --git a/tests/sized.rs b/tests/sized.rs
new file mode 100644
index 0000000..9fd7e2b
--- /dev/null
+++ b/tests/sized.rs
@@ -0,0 +1,13 @@
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+#![allow(dead_code)]
+
+use pin_project::pin_project;
+
+#[pin_project]
+struct Foo<'a, I: ?Sized, Item>
+where
+    I: Iterator,
+{
+    iter: &'a mut I,
+    item: Option<Item>,
+}
diff --git a/tests/ui/pin_project/project_replace_unsized.stderr b/tests/ui/pin_project/project_replace_unsized.stderr
index c3a3be7..0395c4e 100644
--- a/tests/ui/pin_project/project_replace_unsized.stderr
+++ b/tests/ui/pin_project/project_replace_unsized.stderr
@@ -6,11 +6,12 @@
 4 | struct Struct<T: ?Sized> {
   |               - this type parameter needs to be `std::marker::Sized`
   |
-  = help: within `Struct<T>`, the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `Struct<T>`
-  = note: all local variables must have a statically known size
   = help: unsized locals are gated as an unstable feature
+help: function arguments must have a statically known size, borrowed types always have a known size
+  |
+3 | #[pin_project(&project_replace)] //~ ERROR E0277
+  |               ^
 
 error[E0277]: the size for values of type `T` cannot be known at compilation time
    --> $DIR/project_replace_unsized.rs:5:5
@@ -19,9 +20,6 @@
     |               - this type parameter needs to be `std::marker::Sized`
 5   |     x: T,
     |     ^ doesn't have a size known at compile-time
-    |
-    = help: the trait `std::marker::Sized` is not implemented for `T`
-    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
 
 error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/project_replace_unsized.rs:3:1
@@ -31,8 +29,6 @@
 4 | struct Struct<T: ?Sized> {
   |               - this type parameter needs to be `std::marker::Sized`
   |
-  = help: within `__StructProjectionOwned<T>`, the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `__StructProjectionOwned<T>`
   = note: structs must have a statically known size to be initialized
   = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
@@ -45,11 +41,12 @@
 9 | struct TupleStruct<T: ?Sized>(T);
   |                    - this type parameter needs to be `std::marker::Sized`
   |
-  = help: within `TupleStruct<T>`, the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `TupleStruct<T>`
-  = note: all local variables must have a statically known size
   = help: unsized locals are gated as an unstable feature
+help: function arguments must have a statically known size, borrowed types always have a known size
+  |
+8 | #[pin_project(&project_replace)] //~ ERROR E0277
+  |               ^
 
 error[E0277]: the size for values of type `T` cannot be known at compilation time
    --> $DIR/project_replace_unsized.rs:8:1
@@ -59,8 +56,6 @@
 9   | struct TupleStruct<T: ?Sized>(T);
     |                    - this type parameter needs to be `std::marker::Sized`
     |
-    = help: the trait `std::marker::Sized` is not implemented for `T`
-    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
     = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the size for values of type `T` cannot be known at compilation time
@@ -71,7 +66,5 @@
   |        |
   |        doesn't have a size known at compile-time
   |
-  = help: the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: all function arguments must have a statically known size
   = help: unsized locals are gated as an unstable feature
diff --git a/tests/ui/pin_project/project_replace_unsized_locals.stderr b/tests/ui/pin_project/project_replace_unsized_locals.stderr
index 1616904..1266c4d 100644
--- a/tests/ui/pin_project/project_replace_unsized_locals.stderr
+++ b/tests/ui/pin_project/project_replace_unsized_locals.stderr
@@ -7,8 +7,6 @@
   |        |      this type parameter needs to be `std::marker::Sized`
   |        doesn't have a size known at compile-time
   |
-  = help: within `__StructProjectionOwned<T>`, the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `__StructProjectionOwned<T>`
   = note: the return type of a function must have a statically known size
 
@@ -19,9 +17,6 @@
     |               - this type parameter needs to be `std::marker::Sized`
 7   |     x: T,
     |     ^ doesn't have a size known at compile-time
-    |
-    = help: the trait `std::marker::Sized` is not implemented for `T`
-    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
 
 error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/project_replace_unsized_locals.rs:5:1
@@ -31,8 +26,6 @@
 6 | struct Struct<T: ?Sized> {
   |               - this type parameter needs to be `std::marker::Sized`
   |
-  = help: within `__StructProjectionOwned<T>`, the trait `std::marker::Sized` is not implemented for `T`
-  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `__StructProjectionOwned<T>`
   = note: structs must have a statically known size to be initialized
   = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
@@ -46,8 +39,6 @@
    |        |           this type parameter needs to be `std::marker::Sized`
    |        doesn't have a size known at compile-time
    |
-   = help: within `__TupleStructProjectionOwned<T>`, the trait `std::marker::Sized` is not implemented for `T`
-   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
    = note: required because it appears within the type `__TupleStructProjectionOwned<T>`
    = note: the return type of a function must have a statically known size
 
@@ -59,6 +50,4 @@
 11  | struct TupleStruct<T: ?Sized>(T);
     |                    - this type parameter needs to be `std::marker::Sized`
     |
-    = help: the trait `std::marker::Sized` is not implemented for `T`
-    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
     = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/tests/ui/pinned_drop/self.stderr b/tests/ui/pinned_drop/self.stderr
index 2a71b0a..4ac0e63 100644
--- a/tests/ui/pinned_drop/self.stderr
+++ b/tests/ui/pinned_drop/self.stderr
@@ -31,7 +31,7 @@
    | |_____- `S` defined here
 ...
 38 |               let _: Self = Self; //~ ERROR E0423
-   |                             ^^^^ did you mean `S { /* fields */ }`?
+   |                             ^^^^ help: use struct literal syntax instead: `S { x: val }`
 
 error[E0308]: mismatched types
   --> $DIR/self.rs:37:25