diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index f3ad3ab..3d43471 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,6 @@
 {
   "git": {
-    "sha1": "c91f8691672c7401b1923ab00bf138975c99391a"
-  }
-}
+    "sha1": "fc1e3250219170e31cddb8857a276cba7dd08d44"
+  },
+  "path_in_vcs": "futures-io"
+}
\ No newline at end of file
diff --git a/Android.bp b/Android.bp
index fa20cd8..ba96032 100644
--- a/Android.bp
+++ b/Android.bp
@@ -37,36 +37,12 @@
     ],
 }
 
-rust_defaults {
-    name: "futures-io_defaults",
-    crate_name: "futures_io",
-    srcs: ["src/lib.rs"],
-    test_suites: ["general-tests"],
-    auto_gen_config: true,
-    edition: "2018",
-    features: [
-        "default",
-        "std",
-    ],
-}
-
-rust_test_host {
-    name: "futures-io_host_test_src_lib",
-    defaults: ["futures-io_defaults"],
-    test_options: {
-        unit_test: true,
-    },
-}
-
-rust_test {
-    name: "futures-io_device_test_src_lib",
-    defaults: ["futures-io_defaults"],
-}
-
 rust_library {
     name: "libfutures_io",
     host_supported: true,
     crate_name: "futures_io",
+    cargo_env_compat: true,
+    cargo_pkg_version: "0.3.21",
     srcs: ["src/lib.rs"],
     edition: "2018",
     features: [
@@ -75,6 +51,7 @@
     ],
     apex_available: [
         "//apex_available:platform",
+        "com.android.bluetooth",
         "com.android.resolv",
         "com.android.virt",
     ],
diff --git a/Cargo.toml b/Cargo.toml
index 0cf53b7..9494c45 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,31 +3,34 @@
 # When uploading crates to the registry Cargo will automatically
 # "normalize" Cargo.toml files for maximal compatibility
 # with all versions of Cargo and also rewrite `path` dependencies
-# to registry (e.g., crates.io) dependencies
+# to registry (e.g., crates.io) dependencies.
 #
-# If you believe there's an error in this file please file an
-# issue against the rust-lang/cargo repository. If you're
-# editing this file be aware that the upstream Cargo.toml
-# will likely look very different (and much more reasonable)
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
 
 [package]
 edition = "2018"
+rust-version = "1.36"
 name = "futures-io"
-version = "0.3.13"
-authors = ["Alex Crichton <alex@alexcrichton.com>"]
-description = "The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library.\n"
+version = "0.3.21"
+description = """
+The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library.
+"""
 homepage = "https://rust-lang.github.io/futures-rs"
-documentation = "https://docs.rs/futures-io/0.3"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
+
 [package.metadata.docs.rs]
 all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
+rustdoc-args = [
+    "--cfg",
+    "docsrs",
+]
 
 [dependencies]
 
 [features]
 default = ["std"]
-read-initializer = []
 std = []
 unstable = []
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index 2edbdc3..8d44694 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,12 +1,11 @@
 [package]
 name = "futures-io"
+version = "0.3.21"
 edition = "2018"
-version = "0.3.13"
-authors = ["Alex Crichton <alex@alexcrichton.com>"]
+rust-version = "1.36"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
 homepage = "https://rust-lang.github.io/futures-rs"
-documentation = "https://docs.rs/futures-io/0.3"
 description = """
 The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library.
 """
@@ -19,7 +18,6 @@
 # These features are outside of the normal semver guarantees and require the
 # `unstable` feature as an explicit opt-in to unstable API.
 unstable = []
-read-initializer = []
 
 [dependencies]
 
diff --git a/METADATA b/METADATA
index 64097af..5de28ef 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/futures-io/futures-io-0.3.13.crate"
+    value: "https://static.crates.io/crates/futures-io/futures-io-0.3.21.crate"
   }
-  version: "0.3.13"
+  version: "0.3.21"
   license_type: NOTICE
   last_upgrade_date {
-    year: 2021
-    month: 4
+    year: 2022
+    month: 3
     day: 1
   }
 }
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..da6eec2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# futures-io
+
+The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library.
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+futures-io = "0.3"
+```
+
+The current `futures-io` requires Rust 1.36 or later.
+
+## License
+
+Licensed under either of [Apache License, Version 2.0](LICENSE-APACHE) or
+[MIT license](LICENSE-MIT) at your option.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall
+be dual licensed as above, without any additional terms or conditions.
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 568eaf7..5ef61de 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -1,59 +1,45 @@
 // Generated by update_crate_tests.py for tests that depend on this crate.
 {
+  "imports": [
+    {
+      "path": "external/rust/crates/anyhow"
+    },
+    {
+      "path": "external/rust/crates/futures-util"
+    },
+    {
+      "path": "external/rust/crates/tokio"
+    },
+    {
+      "path": "external/rust/crates/tokio-test"
+    }
+  ],
   "presubmit": [
     {
-      "name": "anyhow_device_test_tests_test_repr"
+      "name": "ZipFuseTest"
     },
     {
-      "name": "anyhow_device_test_tests_test_context"
+      "name": "authfs_device_test_src_lib"
     },
     {
-      "name": "anyhow_device_test_tests_test_convert"
+      "name": "doh_unit_test"
     },
     {
-      "name": "futures-io_device_test_src_lib"
+      "name": "virtualizationservice_device_test"
+    }
+  ],
+  "presubmit-rust": [
+    {
+      "name": "ZipFuseTest"
     },
     {
-      "name": "tokio-test_device_test_tests_block_on"
+      "name": "authfs_device_test_src_lib"
     },
     {
-      "name": "tokio-test_device_test_tests_io"
+      "name": "doh_unit_test"
     },
     {
-      "name": "tokio-test_device_test_tests_macros"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_downcast"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_fmt"
-    },
-    {
-      "name": "futures-util_device_test_src_lib"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_autotrait"
-    },
-    {
-      "name": "anyhow_device_test_src_lib"
-    },
-    {
-      "name": "tokio-test_device_test_src_lib"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_source"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_ffi"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_macros"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_chain"
-    },
-    {
-      "name": "anyhow_device_test_tests_test_boxed"
+      "name": "virtualizationservice_device_test"
     }
   ]
 }
diff --git a/cargo2android.json b/cargo2android.json
index 44e747c..5b266a6 100644
--- a/cargo2android.json
+++ b/cargo2android.json
@@ -1,12 +1,13 @@
 {
   "apex-available": [
     "//apex_available:platform",
+    "com.android.bluetooth",
     "com.android.resolv",
     "com.android.virt"
   ],
-  "min_sdk_version": "29",
   "dependencies": true,
   "device": true,
+  "min-sdk-version": "29",
   "run": true,
   "tests": true
-}
\ No newline at end of file
+}
diff --git a/src/lib.rs b/src/lib.rs
index 48de896..e91eb78 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,21 +8,19 @@
 //! All items of this library are only available when the `std` feature of this
 //! library is activated, and it is activated by default.
 
-#![cfg_attr(all(feature = "read-initializer", feature = "std"), feature(read_initializer))]
-
 #![cfg_attr(not(feature = "std"), no_std)]
-
-#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms, unreachable_pub)]
+#![warn(missing_debug_implementations, missing_docs, rust_2018_idioms, unreachable_pub)]
 // It cannot be included in the published code because this lints have false positives in the minimum required version.
 #![cfg_attr(test, warn(single_use_lifetimes))]
-#![warn(clippy::all)]
-#![doc(test(attr(deny(warnings), allow(dead_code, unused_assignments, unused_variables))))]
-
+#![doc(test(
+    no_crate_inject,
+    attr(
+        deny(warnings, rust_2018_idioms, single_use_lifetimes),
+        allow(dead_code, unused_assignments, unused_variables)
+    )
+))]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
-#[cfg(all(feature = "read-initializer", not(feature = "unstable")))]
-compile_error!("The `read-initializer` feature requires the `unstable` feature as an explicit opt-in to unstable features");
-
 #[cfg(feature = "std")]
 mod if_std {
     use std::io;
@@ -34,12 +32,7 @@
     // with conflicts when `use`ing `futures::io` and `std::io`.
     #[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
     #[doc(no_inline)]
-    pub use io::{Error, ErrorKind, Result, IoSlice, IoSliceMut, SeekFrom};
-    #[cfg(feature = "read-initializer")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "read-initializer")))]
-    #[doc(no_inline)]
-    #[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411
-    pub use io::Initializer;
+    pub use io::{Error, ErrorKind, IoSlice, IoSliceMut, Result, SeekFrom};
 
     /// Read bytes asynchronously.
     ///
@@ -49,27 +42,6 @@
     /// for wakeup and return if data is not yet available, rather than blocking
     /// the calling thread.
     pub trait AsyncRead {
-        /// Determines if this `AsyncRead`er can work with buffers of
-        /// uninitialized memory.
-        ///
-        /// The default implementation returns an initializer which will zero
-        /// buffers.
-        ///
-        /// This method is only available when the `read-initializer` feature of this
-        /// library is activated.
-        ///
-        /// # Safety
-        ///
-        /// This method is `unsafe` because an `AsyncRead`er could otherwise
-        /// return a non-zeroing `Initializer` from another `AsyncRead` type
-        /// without an `unsafe` block.
-        #[cfg(feature = "read-initializer")]
-        #[cfg_attr(docsrs, doc(cfg(feature = "read-initializer")))]
-        #[inline]
-        unsafe fn initializer(&self) -> Initializer {
-            Initializer::zeroing()
-        }
-
         /// Attempt to read from the `AsyncRead` into `buf`.
         ///
         /// On success, returns `Poll::Ready(Ok(num_bytes_read))`.
@@ -85,8 +57,11 @@
         /// `Interrupted`.  Implementations must convert `WouldBlock` into
         /// `Poll::Pending` and either internally retry or convert
         /// `Interrupted` into another error kind.
-        fn poll_read(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8])
-            -> Poll<Result<usize>>;
+        fn poll_read(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            buf: &mut [u8],
+        ) -> Poll<Result<usize>>;
 
         /// Attempt to read from the `AsyncRead` into `bufs` using vectored
         /// IO operations.
@@ -110,9 +85,11 @@
         /// `Interrupted`.  Implementations must convert `WouldBlock` into
         /// `Poll::Pending` and either internally retry or convert
         /// `Interrupted` into another error kind.
-        fn poll_read_vectored(self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>])
-            -> Poll<Result<usize>>
-        {
+        fn poll_read_vectored(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            bufs: &mut [IoSliceMut<'_>],
+        ) -> Poll<Result<usize>> {
             for b in bufs {
                 if !b.is_empty() {
                     return self.poll_read(cx, b);
@@ -149,8 +126,11 @@
         ///
         /// `poll_write` must try to make progress by flushing the underlying object if
         /// that is the only way the underlying object can become writable again.
-        fn poll_write(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8])
-            -> Poll<Result<usize>>;
+        fn poll_write(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            buf: &[u8],
+        ) -> Poll<Result<usize>>;
 
         /// Attempt to write bytes from `bufs` into the object using vectored
         /// IO operations.
@@ -175,9 +155,11 @@
         /// `Interrupted`.  Implementations must convert `WouldBlock` into
         /// `Poll::Pending` and either internally retry or convert
         /// `Interrupted` into another error kind.
-        fn poll_write_vectored(self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>])
-            -> Poll<Result<usize>>
-        {
+        fn poll_write_vectored(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            bufs: &[IoSlice<'_>],
+        ) -> Poll<Result<usize>> {
             for b in bufs {
                 if !b.is_empty() {
                     return self.poll_write(cx, b);
@@ -252,8 +234,11 @@
         /// `Interrupted`.  Implementations must convert `WouldBlock` into
         /// `Poll::Pending` and either internally retry or convert
         /// `Interrupted` into another error kind.
-        fn poll_seek(self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom)
-            -> Poll<Result<u64>>;
+        fn poll_seek(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            pos: SeekFrom,
+        ) -> Poll<Result<u64>>;
     }
 
     /// Read bytes asynchronously.
@@ -292,8 +277,7 @@
         /// `Interrupted`.  Implementations must convert `WouldBlock` into
         /// `Poll::Pending` and either internally retry or convert
         /// `Interrupted` into another error kind.
-        fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>)
-            -> Poll<Result<&[u8]>>;
+        fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<&[u8]>>;
 
         /// Tells this buffer that `amt` bytes have been consumed from the buffer,
         /// so they should no longer be returned in calls to [`poll_read`].
@@ -315,23 +299,22 @@
 
     macro_rules! deref_async_read {
         () => {
-            #[cfg(feature = "read-initializer")]
-            unsafe fn initializer(&self) -> Initializer {
-                (**self).initializer()
-            }
-
-            fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8])
-                -> Poll<Result<usize>>
-            {
+            fn poll_read(
+                mut self: Pin<&mut Self>,
+                cx: &mut Context<'_>,
+                buf: &mut [u8],
+            ) -> Poll<Result<usize>> {
                 Pin::new(&mut **self).poll_read(cx, buf)
             }
 
-            fn poll_read_vectored(mut self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>])
-                -> Poll<Result<usize>>
-            {
+            fn poll_read_vectored(
+                mut self: Pin<&mut Self>,
+                cx: &mut Context<'_>,
+                bufs: &mut [IoSliceMut<'_>],
+            ) -> Poll<Result<usize>> {
                 Pin::new(&mut **self).poll_read_vectored(cx, bufs)
             }
-        }
+        };
     }
 
     impl<T: ?Sized + AsyncRead + Unpin> AsyncRead for Box<T> {
@@ -347,43 +330,41 @@
         P: DerefMut + Unpin,
         P::Target: AsyncRead,
     {
-        #[cfg(feature = "read-initializer")]
-        unsafe fn initializer(&self) -> Initializer {
-            (**self).initializer()
-        }
-
-        fn poll_read(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8])
-            -> Poll<Result<usize>>
-        {
+        fn poll_read(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            buf: &mut [u8],
+        ) -> Poll<Result<usize>> {
             self.get_mut().as_mut().poll_read(cx, buf)
         }
 
-        fn poll_read_vectored(self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>])
-            -> Poll<Result<usize>>
-        {
+        fn poll_read_vectored(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            bufs: &mut [IoSliceMut<'_>],
+        ) -> Poll<Result<usize>> {
             self.get_mut().as_mut().poll_read_vectored(cx, bufs)
         }
     }
 
     macro_rules! delegate_async_read_to_stdio {
         () => {
-            #[cfg(feature = "read-initializer")]
-            unsafe fn initializer(&self) -> Initializer {
-                io::Read::initializer(self)
-            }
-
-            fn poll_read(mut self: Pin<&mut Self>, _: &mut Context<'_>, buf: &mut [u8])
-                -> Poll<Result<usize>>
-            {
+            fn poll_read(
+                mut self: Pin<&mut Self>,
+                _: &mut Context<'_>,
+                buf: &mut [u8],
+            ) -> Poll<Result<usize>> {
                 Poll::Ready(io::Read::read(&mut *self, buf))
             }
 
-            fn poll_read_vectored(mut self: Pin<&mut Self>, _: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>])
-                -> Poll<Result<usize>>
-            {
+            fn poll_read_vectored(
+                mut self: Pin<&mut Self>,
+                _: &mut Context<'_>,
+                bufs: &mut [IoSliceMut<'_>],
+            ) -> Poll<Result<usize>> {
                 Poll::Ready(io::Read::read_vectored(&mut *self, bufs))
             }
-        }
+        };
     }
 
     impl AsyncRead for &[u8] {
@@ -392,15 +373,19 @@
 
     macro_rules! deref_async_write {
         () => {
-            fn poll_write(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8])
-                -> Poll<Result<usize>>
-            {
+            fn poll_write(
+                mut self: Pin<&mut Self>,
+                cx: &mut Context<'_>,
+                buf: &[u8],
+            ) -> Poll<Result<usize>> {
                 Pin::new(&mut **self).poll_write(cx, buf)
             }
 
-            fn poll_write_vectored(mut self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>])
-                -> Poll<Result<usize>>
-            {
+            fn poll_write_vectored(
+                mut self: Pin<&mut Self>,
+                cx: &mut Context<'_>,
+                bufs: &[IoSlice<'_>],
+            ) -> Poll<Result<usize>> {
                 Pin::new(&mut **self).poll_write_vectored(cx, bufs)
             }
 
@@ -411,7 +396,7 @@
             fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
                 Pin::new(&mut **self).poll_close(cx)
             }
-        }
+        };
     }
 
     impl<T: ?Sized + AsyncWrite + Unpin> AsyncWrite for Box<T> {
@@ -427,15 +412,19 @@
         P: DerefMut + Unpin,
         P::Target: AsyncWrite,
     {
-        fn poll_write(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8])
-            -> Poll<Result<usize>>
-        {
+        fn poll_write(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            buf: &[u8],
+        ) -> Poll<Result<usize>> {
             self.get_mut().as_mut().poll_write(cx, buf)
         }
 
-        fn poll_write_vectored(self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>])
-            -> Poll<Result<usize>>
-        {
+        fn poll_write_vectored(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            bufs: &[IoSlice<'_>],
+        ) -> Poll<Result<usize>> {
             self.get_mut().as_mut().poll_write_vectored(cx, bufs)
         }
 
@@ -450,15 +439,19 @@
 
     macro_rules! delegate_async_write_to_stdio {
         () => {
-            fn poll_write(mut self: Pin<&mut Self>, _: &mut Context<'_>, buf: &[u8])
-                -> Poll<Result<usize>>
-            {
+            fn poll_write(
+                mut self: Pin<&mut Self>,
+                _: &mut Context<'_>,
+                buf: &[u8],
+            ) -> Poll<Result<usize>> {
                 Poll::Ready(io::Write::write(&mut *self, buf))
             }
 
-            fn poll_write_vectored(mut self: Pin<&mut Self>, _: &mut Context<'_>, bufs: &[IoSlice<'_>])
-                -> Poll<Result<usize>>
-            {
+            fn poll_write_vectored(
+                mut self: Pin<&mut Self>,
+                _: &mut Context<'_>,
+                bufs: &[IoSlice<'_>],
+            ) -> Poll<Result<usize>> {
                 Poll::Ready(io::Write::write_vectored(&mut *self, bufs))
             }
 
@@ -469,7 +462,7 @@
             fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
                 self.poll_flush(cx)
             }
-        }
+        };
     }
 
     impl AsyncWrite for Vec<u8> {
@@ -478,12 +471,14 @@
 
     macro_rules! deref_async_seek {
         () => {
-            fn poll_seek(mut self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom)
-                -> Poll<Result<u64>>
-            {
+            fn poll_seek(
+                mut self: Pin<&mut Self>,
+                cx: &mut Context<'_>,
+                pos: SeekFrom,
+            ) -> Poll<Result<u64>> {
                 Pin::new(&mut **self).poll_seek(cx, pos)
             }
-        }
+        };
     }
 
     impl<T: ?Sized + AsyncSeek + Unpin> AsyncSeek for Box<T> {
@@ -499,25 +494,25 @@
         P: DerefMut + Unpin,
         P::Target: AsyncSeek,
     {
-        fn poll_seek(self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom)
-            -> Poll<Result<u64>>
-        {
+        fn poll_seek(
+            self: Pin<&mut Self>,
+            cx: &mut Context<'_>,
+            pos: SeekFrom,
+        ) -> Poll<Result<u64>> {
             self.get_mut().as_mut().poll_seek(cx, pos)
         }
     }
 
     macro_rules! deref_async_buf_read {
         () => {
-            fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>)
-                -> Poll<Result<&[u8]>>
-            {
+            fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<&[u8]>> {
                 Pin::new(&mut **self.get_mut()).poll_fill_buf(cx)
             }
 
             fn consume(mut self: Pin<&mut Self>, amt: usize) {
                 Pin::new(&mut **self).consume(amt)
             }
-        }
+        };
     }
 
     impl<T: ?Sized + AsyncBufRead + Unpin> AsyncBufRead for Box<T> {
@@ -533,9 +528,7 @@
         P: DerefMut + Unpin,
         P::Target: AsyncBufRead,
     {
-        fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>)
-            -> Poll<Result<&[u8]>>
-        {
+        fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<&[u8]>> {
             self.get_mut().as_mut().poll_fill_buf(cx)
         }
 
@@ -546,16 +539,14 @@
 
     macro_rules! delegate_async_buf_read_to_stdio {
         () => {
-            fn poll_fill_buf(self: Pin<&mut Self>, _: &mut Context<'_>)
-                -> Poll<Result<&[u8]>>
-            {
+            fn poll_fill_buf(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<&[u8]>> {
                 Poll::Ready(io::BufRead::fill_buf(self.get_mut()))
             }
 
             fn consume(self: Pin<&mut Self>, amt: usize) {
                 io::BufRead::consume(self.get_mut(), amt)
             }
-        }
+        };
     }
 
     impl AsyncBufRead for &[u8] {