diff --git a/compiler/rustc_builtin_macros/src/test_harness.rs b/compiler/rustc_builtin_macros/src/test_harness.rs
index be4ba66c082aa..9bc1e27b4ec74 100644
--- a/compiler/rustc_builtin_macros/src/test_harness.rs
+++ b/compiler/rustc_builtin_macros/src/test_harness.rs
@@ -232,7 +232,7 @@ fn generate_test_harness(
     let expn_id = ext_cx.resolver.expansion_for_ast_pass(
         DUMMY_SP,
         AstPass::TestHarness,
-        &[sym::test, sym::rustc_attrs],
+        &[sym::test, sym::rustc_attrs, sym::no_coverage],
         None,
     );
     let def_site = DUMMY_SP.with_def_site_ctxt(expn_id.to_expn_id());
@@ -313,6 +313,8 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
 
     // #[rustc_main]
     let main_attr = ecx.attr_word(sym::rustc_main, sp);
+    // #[no_coverage]
+    let no_coverage_attr = ecx.attr_word(sym::no_coverage, sp);
 
     // pub fn main() { ... }
     let main_ret_ty = ecx.ty(sp, ast::TyKind::Tup(ThinVec::new()));
@@ -342,7 +344,7 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
 
     let main = P(ast::Item {
         ident: main_id,
-        attrs: thin_vec![main_attr],
+        attrs: thin_vec![main_attr, no_coverage_attr],
         id: ast::DUMMY_NODE_ID,
         kind: main,
         vis: ast::Visibility { span: sp, kind: ast::VisibilityKind::Public, tokens: None },
diff --git a/compiler/rustc_mir_transform/src/lib.rs b/compiler/rustc_mir_transform/src/lib.rs
index 25d7db0ee605a..8d9a22ea30ddf 100644
--- a/compiler/rustc_mir_transform/src/lib.rs
+++ b/compiler/rustc_mir_transform/src/lib.rs
@@ -616,13 +616,10 @@ fn promoted_mir(tcx: TyCtxt<'_>, def: LocalDefId) -> &IndexVec<Promoted, Body<'_
         return tcx.arena.alloc(IndexVec::new());
     }
 
-    let tainted_by_errors = tcx.mir_borrowck(def).tainted_by_errors;
+    tcx.ensure_with_value().mir_borrowck(def);
     let mut promoted = tcx.mir_promoted(def).1.steal();
 
     for body in &mut promoted {
-        if let Some(error_reported) = tainted_by_errors {
-            body.tainted_by_errors = Some(error_reported);
-        }
         run_analysis_to_runtime_passes(tcx, body);
     }
 
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index 40789cb3049de..82e4c6489745d 100644
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -24,7 +24,7 @@ use crate::hash::Hasher;
 /// operations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring
 /// some overhead) and thus is `Send`.
 ///
-/// See [the Nomicon](../../nomicon/send-and-sync.html) for more details.
+/// See [the Nomicon](../../nomicon/send-and-sync.html) and the [`Sync`] trait for more details.
 ///
 /// [`Rc`]: ../../std/rc/struct.Rc.html
 /// [arc]: ../../std/sync/struct.Arc.html
@@ -426,6 +426,11 @@ pub macro Copy($item:item) {
 /// becomes read-only, as if it were a `& &T`. Hence there is no risk
 /// of a data race.
 ///
+/// A shorter overview of how [`Sync`] and [`Send`] relate to referencing:
+/// * `&T` is [`Send`] if and only if `T` is [`Sync`]
+/// * `&mut T` is [`Send`] if and only if `T` is [`Send`]
+/// * `&T` and `&mut T` are [`Sync`] if and only if `T` is [`Sync`]
+///
 /// Types that are not `Sync` are those that have "interior
 /// mutability" in a non-thread-safe form, such as [`Cell`][cell]
 /// and [`RefCell`][refcell]. These types allow for mutation of
diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index 30e553f285b98..6640c7fb16214 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -709,6 +709,7 @@ impl File {
 // `AsRawHandle`/`IntoRawHandle`/`FromRawHandle` on Windows.
 
 impl AsInner<fs_imp::File> for File {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::File {
         &self.inner
     }
@@ -1087,12 +1088,14 @@ impl OpenOptions {
 }
 
 impl AsInner<fs_imp::OpenOptions> for OpenOptions {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::OpenOptions {
         &self.0
     }
 }
 
 impl AsInnerMut<fs_imp::OpenOptions> for OpenOptions {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut fs_imp::OpenOptions {
         &mut self.0
     }
@@ -1352,6 +1355,7 @@ impl fmt::Debug for Metadata {
 }
 
 impl AsInner<fs_imp::FileAttr> for Metadata {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::FileAttr {
         &self.0
     }
@@ -1604,6 +1608,7 @@ impl FileType {
 }
 
 impl AsInner<fs_imp::FileType> for FileType {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::FileType {
         &self.0
     }
@@ -1616,6 +1621,7 @@ impl FromInner<fs_imp::FilePermissions> for Permissions {
 }
 
 impl AsInner<fs_imp::FilePermissions> for Permissions {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::FilePermissions {
         &self.0
     }
@@ -1770,6 +1776,7 @@ impl fmt::Debug for DirEntry {
 }
 
 impl AsInner<fs_imp::DirEntry> for DirEntry {
+    #[inline]
     fn as_inner(&self) -> &fs_imp::DirEntry {
         &self.0
     }
@@ -2510,6 +2517,7 @@ impl DirBuilder {
 }
 
 impl AsInnerMut<fs_imp::DirBuilder> for DirBuilder {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut fs_imp::DirBuilder {
         &mut self.inner
     }
diff --git a/library/std/src/net/tcp.rs b/library/std/src/net/tcp.rs
index 4b42ad65ee6bf..541e95d229b62 100644
--- a/library/std/src/net/tcp.rs
+++ b/library/std/src/net/tcp.rs
@@ -691,6 +691,7 @@ impl Write for &TcpStream {
 }
 
 impl AsInner<net_imp::TcpStream> for TcpStream {
+    #[inline]
     fn as_inner(&self) -> &net_imp::TcpStream {
         &self.0
     }
@@ -1033,6 +1034,7 @@ impl Iterator for IntoIncoming {
 impl FusedIterator for IntoIncoming {}
 
 impl AsInner<net_imp::TcpListener> for TcpListener {
+    #[inline]
     fn as_inner(&self) -> &net_imp::TcpListener {
         &self.0
     }
diff --git a/library/std/src/net/udp.rs b/library/std/src/net/udp.rs
index 864e1b0f3450a..9628bcc51083d 100644
--- a/library/std/src/net/udp.rs
+++ b/library/std/src/net/udp.rs
@@ -788,6 +788,7 @@ impl UdpSocket {
 // `AsRawSocket`/`IntoRawSocket`/`FromRawSocket` on Windows.
 
 impl AsInner<net_imp::UdpSocket> for UdpSocket {
+    #[inline]
     fn as_inner(&self) -> &net_imp::UdpSocket {
         &self.0
     }
diff --git a/library/std/src/os/linux/process.rs b/library/std/src/os/linux/process.rs
index 540363c03494e..2b3ff76d7a4a7 100644
--- a/library/std/src/os/linux/process.rs
+++ b/library/std/src/os/linux/process.rs
@@ -52,6 +52,7 @@ pub struct PidFd {
 }
 
 impl AsInner<FileDesc> for PidFd {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.inner
     }
@@ -70,6 +71,7 @@ impl IntoInner<FileDesc> for PidFd {
 }
 
 impl AsRawFd for PidFd {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.as_inner().as_raw_fd()
     }
diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index 5b22333cc354f..198996c5f707f 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -1395,11 +1395,16 @@ impl PathBuf {
     ///
     /// let mut buf = PathBuf::from("/");
     /// assert!(buf.file_name() == None);
-    /// buf.set_file_name("bar");
-    /// assert!(buf == PathBuf::from("/bar"));
+    ///
+    /// buf.set_file_name("foo.txt");
+    /// assert!(buf == PathBuf::from("/foo.txt"));
     /// assert!(buf.file_name().is_some());
-    /// buf.set_file_name("baz.txt");
-    /// assert!(buf == PathBuf::from("/baz.txt"));
+    ///
+    /// buf.set_file_name("bar.txt");
+    /// assert!(buf == PathBuf::from("/bar.txt"));
+    ///
+    /// buf.set_file_name("baz");
+    /// assert!(buf == PathBuf::from("/baz"));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn set_file_name<S: AsRef<OsStr>>(&mut self, file_name: S) {
@@ -2562,7 +2567,8 @@ impl Path {
     /// ```
     /// use std::path::{Path, PathBuf};
     ///
-    /// let path = Path::new("/tmp/foo.txt");
+    /// let path = Path::new("/tmp/foo.png");
+    /// assert_eq!(path.with_file_name("bar"), PathBuf::from("/tmp/bar"));
     /// assert_eq!(path.with_file_name("bar.txt"), PathBuf::from("/tmp/bar.txt"));
     ///
     /// let path = Path::new("/tmp");
diff --git a/library/std/src/process.rs b/library/std/src/process.rs
index 0ab72f7ea7a6d..bf22c2d46c9e0 100644
--- a/library/std/src/process.rs
+++ b/library/std/src/process.rs
@@ -211,6 +211,7 @@ pub struct Child {
 impl crate::sealed::Sealed for Child {}
 
 impl AsInner<imp::Process> for Child {
+    #[inline]
     fn as_inner(&self) -> &imp::Process {
         &self.handle
     }
@@ -304,6 +305,7 @@ impl Write for &ChildStdin {
 }
 
 impl AsInner<AnonPipe> for ChildStdin {
+    #[inline]
     fn as_inner(&self) -> &AnonPipe {
         &self.inner
     }
@@ -373,6 +375,7 @@ impl Read for ChildStdout {
 }
 
 impl AsInner<AnonPipe> for ChildStdout {
+    #[inline]
     fn as_inner(&self) -> &AnonPipe {
         &self.inner
     }
@@ -438,6 +441,7 @@ impl Read for ChildStderr {
 }
 
 impl AsInner<AnonPipe> for ChildStderr {
+    #[inline]
     fn as_inner(&self) -> &AnonPipe {
         &self.inner
     }
@@ -1107,12 +1111,14 @@ impl fmt::Debug for Command {
 }
 
 impl AsInner<imp::Command> for Command {
+    #[inline]
     fn as_inner(&self) -> &imp::Command {
         &self.inner
     }
 }
 
 impl AsInnerMut<imp::Command> for Command {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut imp::Command {
         &mut self.inner
     }
@@ -1605,6 +1611,7 @@ impl ExitStatus {
 }
 
 impl AsInner<imp::ExitStatus> for ExitStatus {
+    #[inline]
     fn as_inner(&self) -> &imp::ExitStatus {
         &self.0
     }
@@ -1884,6 +1891,7 @@ impl From<u8> for ExitCode {
 }
 
 impl AsInner<imp::ExitCode> for ExitCode {
+    #[inline]
     fn as_inner(&self) -> &imp::ExitCode {
         &self.0
     }
diff --git a/library/std/src/sys/hermit/fd.rs b/library/std/src/sys/hermit/fd.rs
index 3a2cdd301ea45..ccde05aa1d7db 100644
--- a/library/std/src/sys/hermit/fd.rs
+++ b/library/std/src/sys/hermit/fd.rs
@@ -75,6 +75,7 @@ impl FromRawFd for FileDesc {
 }
 
 impl AsInner<OwnedFd> for FileDesc {
+    #[inline]
     fn as_inner(&self) -> &OwnedFd {
         &self.fd
     }
diff --git a/library/std/src/sys/hermit/fs.rs b/library/std/src/sys/hermit/fs.rs
index cf0b271761feb..4bb735668d24c 100644
--- a/library/std/src/sys/hermit/fs.rs
+++ b/library/std/src/sys/hermit/fs.rs
@@ -367,12 +367,14 @@ impl DirBuilder {
 }
 
 impl AsInner<FileDesc> for File {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.0
     }
 }
 
 impl AsInnerMut<FileDesc> for File {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut FileDesc {
         &mut self.0
     }
@@ -397,6 +399,7 @@ impl AsFd for File {
 }
 
 impl AsRawFd for File {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/hermit/net.rs b/library/std/src/sys/hermit/net.rs
index d6f64a2971902..8c2d489d6a362 100644
--- a/library/std/src/sys/hermit/net.rs
+++ b/library/std/src/sys/hermit/net.rs
@@ -340,6 +340,7 @@ impl Socket {
 }
 
 impl AsInner<FileDesc> for Socket {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.0
     }
@@ -364,6 +365,7 @@ impl AsFd for Socket {
 }
 
 impl AsRawFd for Socket {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/sgx/fd.rs b/library/std/src/sys/sgx/fd.rs
index 0c02a107691c8..b3686d0e28328 100644
--- a/library/std/src/sys/sgx/fd.rs
+++ b/library/std/src/sys/sgx/fd.rs
@@ -62,6 +62,7 @@ impl FileDesc {
 }
 
 impl AsInner<Fd> for FileDesc {
+    #[inline]
     fn as_inner(&self) -> &Fd {
         &self.fd
     }
diff --git a/library/std/src/sys/sgx/net.rs b/library/std/src/sys/sgx/net.rs
index 923be5eb944ec..03620a08f2c03 100644
--- a/library/std/src/sys/sgx/net.rs
+++ b/library/std/src/sys/sgx/net.rs
@@ -24,6 +24,7 @@ impl Socket {
 }
 
 impl AsInner<FileDesc> for Socket {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.inner
     }
@@ -220,6 +221,7 @@ impl TcpStream {
 }
 
 impl AsInner<Socket> for TcpStream {
+    #[inline]
     fn as_inner(&self) -> &Socket {
         &self.inner
     }
@@ -304,6 +306,7 @@ impl TcpListener {
 }
 
 impl AsInner<Socket> for TcpListener {
+    #[inline]
     fn as_inner(&self) -> &Socket {
         &self.inner
     }
diff --git a/library/std/src/sys/solid/net.rs b/library/std/src/sys/solid/net.rs
index 7d7bfae14329a..0bd2bc3b96199 100644
--- a/library/std/src/sys/solid/net.rs
+++ b/library/std/src/sys/solid/net.rs
@@ -112,6 +112,7 @@ impl FileDesc {
 }
 
 impl AsInner<c_int> for FileDesc {
+    #[inline]
     fn as_inner(&self) -> &c_int {
         &self.fd
     }
@@ -462,6 +463,7 @@ impl Socket {
 }
 
 impl AsInner<c_int> for Socket {
+    #[inline]
     fn as_inner(&self) -> &c_int {
         self.0.as_inner()
     }
diff --git a/library/std/src/sys/unix/fd.rs b/library/std/src/sys/unix/fd.rs
index ce5c048f252a1..45f96478fc373 100644
--- a/library/std/src/sys/unix/fd.rs
+++ b/library/std/src/sys/unix/fd.rs
@@ -481,6 +481,7 @@ impl<'a> Read for &'a FileDesc {
 }
 
 impl AsInner<OwnedFd> for FileDesc {
+    #[inline]
     fn as_inner(&self) -> &OwnedFd {
         &self.0
     }
@@ -505,6 +506,7 @@ impl AsFd for FileDesc {
 }
 
 impl AsRawFd for FileDesc {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/unix/fs.rs b/library/std/src/sys/unix/fs.rs
index abef170dd5a64..b398fd5eb24bf 100644
--- a/library/std/src/sys/unix/fs.rs
+++ b/library/std/src/sys/unix/fs.rs
@@ -547,6 +547,7 @@ impl FileAttr {
 }
 
 impl AsInner<stat64> for FileAttr {
+    #[inline]
     fn as_inner(&self) -> &stat64 {
         &self.stat
     }
@@ -1193,8 +1194,6 @@ impl File {
                 None => Ok(libc::timespec { tv_sec: 0, tv_nsec: libc::UTIME_OMIT as _ }),
             }
         };
-        #[cfg(not(any(target_os = "redox", target_os = "espidf", target_os = "horizon")))]
-        let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
         cfg_if::cfg_if! {
             if #[cfg(any(target_os = "redox", target_os = "espidf", target_os = "horizon"))] {
                 // Redox doesn't appear to support `UTIME_OMIT`.
@@ -1206,6 +1205,7 @@ impl File {
                     "setting file times not supported",
                 ))
             } else if #[cfg(any(target_os = "android", target_os = "macos"))] {
+                let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
                 // futimens requires macOS 10.13, and Android API level 19
                 cvt(unsafe {
                     weak!(fn futimens(c_int, *const libc::timespec) -> c_int);
@@ -1232,6 +1232,22 @@ impl File {
                 })?;
                 Ok(())
             } else {
+                #[cfg(all(target_os = "linux", target_env = "gnu", target_pointer_width = "32", not(target_arch = "riscv32")))]
+                {
+                    use crate::sys::{time::__timespec64, weak::weak};
+
+                    // Added in glibc 2.34
+                    weak!(fn __futimens64(libc::c_int, *const __timespec64) -> libc::c_int);
+
+                    if let Some(futimens64) = __futimens64.get() {
+                        let to_timespec = |time: Option<SystemTime>| time.map(|time| time.t.to_timespec64())
+                            .unwrap_or(__timespec64::new(0, libc::UTIME_OMIT as _));
+                        let times = [to_timespec(times.accessed), to_timespec(times.modified)];
+                        cvt(unsafe { futimens64(self.as_raw_fd(), times.as_ptr()) })?;
+                        return Ok(());
+                    }
+                }
+                let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
                 cvt(unsafe { libc::futimens(self.as_raw_fd(), times.as_ptr()) })?;
                 Ok(())
             }
@@ -1254,12 +1270,14 @@ impl DirBuilder {
 }
 
 impl AsInner<FileDesc> for File {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.0
     }
 }
 
 impl AsInnerMut<FileDesc> for File {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut FileDesc {
         &mut self.0
     }
@@ -1284,6 +1302,7 @@ impl AsFd for File {
 }
 
 impl AsRawFd for File {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/unix/l4re.rs b/library/std/src/sys/unix/l4re.rs
index 9967588939ac9..ee016887e7021 100644
--- a/library/std/src/sys/unix/l4re.rs
+++ b/library/std/src/sys/unix/l4re.rs
@@ -129,6 +129,7 @@ pub mod net {
     }
 
     impl AsInner<FileDesc> for Socket {
+        #[inline]
         fn as_inner(&self) -> &FileDesc {
             &self.0
         }
@@ -153,6 +154,7 @@ pub mod net {
     }
 
     impl AsRawFd for Socket {
+        #[inline]
         fn as_raw_fd(&self) -> RawFd {
             self.0.as_raw_fd()
         }
@@ -183,6 +185,7 @@ pub mod net {
             unimpl!();
         }
 
+        #[inline]
         pub fn socket(&self) -> &Socket {
             &self.inner
         }
@@ -305,6 +308,7 @@ pub mod net {
             unimpl!();
         }
 
+        #[inline]
         pub fn socket(&self) -> &Socket {
             &self.inner
         }
@@ -371,6 +375,7 @@ pub mod net {
             unimpl!();
         }
 
+        #[inline]
         pub fn socket(&self) -> &Socket {
             &self.inner
         }
diff --git a/library/std/src/sys/unix/net.rs b/library/std/src/sys/unix/net.rs
index 573bfa6587e81..39edb136c24fd 100644
--- a/library/std/src/sys/unix/net.rs
+++ b/library/std/src/sys/unix/net.rs
@@ -490,6 +490,7 @@ impl Socket {
 }
 
 impl AsInner<FileDesc> for Socket {
+    #[inline]
     fn as_inner(&self) -> &FileDesc {
         &self.0
     }
@@ -514,6 +515,7 @@ impl AsFd for Socket {
 }
 
 impl AsRawFd for Socket {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/unix/os_str.rs b/library/std/src/sys/unix/os_str.rs
index 017e2af29d4f4..488217f39413f 100644
--- a/library/std/src/sys/unix/os_str.rs
+++ b/library/std/src/sys/unix/os_str.rs
@@ -89,6 +89,7 @@ impl IntoInner<Vec<u8>> for Buf {
 }
 
 impl AsInner<[u8]> for Buf {
+    #[inline]
     fn as_inner(&self) -> &[u8] {
         &self.inner
     }
diff --git a/library/std/src/sys/unix/pipe.rs b/library/std/src/sys/unix/pipe.rs
index dc17c9fac460a..938a46bfdd833 100644
--- a/library/std/src/sys/unix/pipe.rs
+++ b/library/std/src/sys/unix/pipe.rs
@@ -135,6 +135,7 @@ pub fn read2(p1: AnonPipe, v1: &mut Vec<u8>, p2: AnonPipe, v2: &mut Vec<u8>) ->
 }
 
 impl AsRawFd for AnonPipe {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
diff --git a/library/std/src/sys/unix/time.rs b/library/std/src/sys/unix/time.rs
index 6f53583409db2..a61d926ca8b3a 100644
--- a/library/std/src/sys/unix/time.rs
+++ b/library/std/src/sys/unix/time.rs
@@ -166,6 +166,16 @@ impl Timespec {
         }
         self.to_timespec()
     }
+
+    #[cfg(all(
+        target_os = "linux",
+        target_env = "gnu",
+        target_pointer_width = "32",
+        not(target_arch = "riscv32")
+    ))]
+    pub fn to_timespec64(&self) -> __timespec64 {
+        __timespec64::new(self.tv_sec, self.tv_nsec.0 as _)
+    }
 }
 
 impl From<libc::timespec> for Timespec {
@@ -190,6 +200,18 @@ pub(in crate::sys::unix) struct __timespec64 {
     _padding: i32,
 }
 
+#[cfg(all(
+    target_os = "linux",
+    target_env = "gnu",
+    target_pointer_width = "32",
+    not(target_arch = "riscv32")
+))]
+impl __timespec64 {
+    pub(in crate::sys::unix) fn new(tv_sec: i64, tv_nsec: i32) -> Self {
+        Self { tv_sec, tv_nsec, _padding: 0 }
+    }
+}
+
 #[cfg(all(
     target_os = "linux",
     target_env = "gnu",
diff --git a/library/std/src/sys/wasi/fd.rs b/library/std/src/sys/wasi/fd.rs
index 191db4b60f72a..9a8b2a0be5b00 100644
--- a/library/std/src/sys/wasi/fd.rs
+++ b/library/std/src/sys/wasi/fd.rs
@@ -275,12 +275,14 @@ impl WasiFd {
 }
 
 impl AsInner<OwnedFd> for WasiFd {
+    #[inline]
     fn as_inner(&self) -> &OwnedFd {
         &self.fd
     }
 }
 
 impl AsInnerMut<OwnedFd> for WasiFd {
+    #[inline]
     fn as_inner_mut(&mut self) -> &mut OwnedFd {
         &mut self.fd
     }
@@ -305,6 +307,7 @@ impl AsFd for WasiFd {
 }
 
 impl AsRawFd for WasiFd {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.fd.as_raw_fd()
     }
diff --git a/library/std/src/sys/wasi/fs.rs b/library/std/src/sys/wasi/fs.rs
index 3a205267e3468..8d1dbf59155a4 100644
--- a/library/std/src/sys/wasi/fs.rs
+++ b/library/std/src/sys/wasi/fs.rs
@@ -498,6 +498,7 @@ impl File {
 }
 
 impl AsInner<WasiFd> for File {
+    #[inline]
     fn as_inner(&self) -> &WasiFd {
         &self.fd
     }
@@ -522,6 +523,7 @@ impl AsFd for File {
 }
 
 impl AsRawFd for File {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.fd.as_raw_fd()
     }
diff --git a/library/std/src/sys/wasi/net.rs b/library/std/src/sys/wasi/net.rs
index 59d94a3686dc5..2239880ffbef4 100644
--- a/library/std/src/sys/wasi/net.rs
+++ b/library/std/src/sys/wasi/net.rs
@@ -17,6 +17,7 @@ pub struct TcpStream {
 }
 
 impl AsInner<WasiFd> for Socket {
+    #[inline]
     fn as_inner(&self) -> &WasiFd {
         &self.0
     }
@@ -41,6 +42,7 @@ impl AsFd for Socket {
 }
 
 impl AsRawFd for Socket {
+    #[inline]
     fn as_raw_fd(&self) -> RawFd {
         self.0.as_raw_fd()
     }
@@ -184,6 +186,7 @@ impl TcpStream {
         }
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
@@ -274,6 +277,7 @@ impl TcpListener {
         }
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
@@ -284,6 +288,7 @@ impl TcpListener {
 }
 
 impl AsInner<Socket> for TcpListener {
+    #[inline]
     fn as_inner(&self) -> &Socket {
         &self.inner
     }
@@ -436,6 +441,7 @@ impl UdpSocket {
         unsupported()
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
@@ -446,6 +452,7 @@ impl UdpSocket {
 }
 
 impl AsInner<Socket> for UdpSocket {
+    #[inline]
     fn as_inner(&self) -> &Socket {
         &self.inner
     }
diff --git a/library/std/src/sys/windows/fs.rs b/library/std/src/sys/windows/fs.rs
index 8ed62cdddcd9c..f99cdfbecfb69 100644
--- a/library/std/src/sys/windows/fs.rs
+++ b/library/std/src/sys/windows/fs.rs
@@ -832,6 +832,7 @@ fn open_link_no_reparse(parent: &File, name: &[u16], access: u32) -> io::Result<
 }
 
 impl AsInner<Handle> for File {
+    #[inline]
     fn as_inner(&self) -> &Handle {
         &self.handle
     }
diff --git a/library/std/src/sys/windows/handle.rs b/library/std/src/sys/windows/handle.rs
index b290f4070e8fd..c7677d1c13abb 100644
--- a/library/std/src/sys/windows/handle.rs
+++ b/library/std/src/sys/windows/handle.rs
@@ -34,6 +34,7 @@ impl Handle {
 }
 
 impl AsInner<OwnedHandle> for Handle {
+    #[inline]
     fn as_inner(&self) -> &OwnedHandle {
         &self.0
     }
diff --git a/library/std/src/sys/windows/net.rs b/library/std/src/sys/windows/net.rs
index ee1f5482b47ee..8158713fa84a8 100644
--- a/library/std/src/sys/windows/net.rs
+++ b/library/std/src/sys/windows/net.rs
@@ -446,6 +446,7 @@ impl<'a> Read for &'a Socket {
 }
 
 impl AsInner<OwnedSocket> for Socket {
+    #[inline]
     fn as_inner(&self) -> &OwnedSocket {
         &self.0
     }
diff --git a/library/std/src/sys/windows/os_str.rs b/library/std/src/sys/windows/os_str.rs
index 4bdd8c505ff25..2f2b0e56e0889 100644
--- a/library/std/src/sys/windows/os_str.rs
+++ b/library/std/src/sys/windows/os_str.rs
@@ -27,6 +27,7 @@ impl FromInner<Wtf8Buf> for Buf {
 }
 
 impl AsInner<Wtf8> for Buf {
+    #[inline]
     fn as_inner(&self) -> &Wtf8 {
         &self.inner
     }
diff --git a/library/std/src/sys_common/net.rs b/library/std/src/sys_common/net.rs
index cb24caa1e8a60..652c695fc57b0 100644
--- a/library/std/src/sys_common/net.rs
+++ b/library/std/src/sys_common/net.rs
@@ -239,6 +239,7 @@ impl TcpStream {
         Ok(TcpStream { inner: sock })
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
@@ -352,6 +353,7 @@ impl TcpStream {
 }
 
 impl AsInner<Socket> for TcpStream {
+    #[inline]
     fn as_inner(&self) -> &Socket {
         &self.inner
     }
@@ -427,6 +429,7 @@ impl TcpListener {
         Ok(TcpListener { inner: sock })
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
@@ -517,6 +520,7 @@ impl UdpSocket {
         Ok(UdpSocket { inner: sock })
     }
 
+    #[inline]
     pub fn socket(&self) -> &Socket {
         &self.inner
     }
diff --git a/library/std/src/sys_common/wtf8.rs b/library/std/src/sys_common/wtf8.rs
index bc588bdbb3ce6..ff96c35fb0ba6 100644
--- a/library/std/src/sys_common/wtf8.rs
+++ b/library/std/src/sys_common/wtf8.rs
@@ -501,6 +501,7 @@ pub struct Wtf8 {
 }
 
 impl AsInner<[u8]> for Wtf8 {
+    #[inline]
     fn as_inner(&self) -> &[u8] {
         &self.bytes
     }
diff --git a/library/std/src/time.rs b/library/std/src/time.rs
index 5c2e9da70fb21..00e2857a13759 100644
--- a/library/std/src/time.rs
+++ b/library/std/src/time.rs
@@ -119,7 +119,7 @@ pub use core::time::TryFromFloatSecsError;
 /// [QueryPerformanceCounter]: https://docs.microsoft.com/en-us/windows/win32/api/profileapi/nf-profileapi-queryperformancecounter
 /// [`insecure_time` usercall]: https://edp.fortanix.com/docs/api/fortanix_sgx_abi/struct.Usercalls.html#method.insecure_time
 /// [timekeeping in SGX]: https://edp.fortanix.com/docs/concepts/rust-std/#codestdtimecode
-/// [__wasi_clock_time_get (Monotonic Clock)]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/docs.md#clock_time_get
+/// [__wasi_clock_time_get (Monotonic Clock)]: https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#clock_time_get
 /// [clock_gettime (Monotonic Clock)]: https://linux.die.net/man/3/clock_gettime
 /// [mach_absolute_time]: https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/KernelProgramming/services/services.html
 ///
@@ -224,7 +224,7 @@ pub struct Instant(time::Instant);
 /// [timekeeping in SGX]: https://edp.fortanix.com/docs/concepts/rust-std/#codestdtimecode
 /// [gettimeofday]: https://man7.org/linux/man-pages/man2/gettimeofday.2.html
 /// [clock_gettime (Realtime Clock)]: https://linux.die.net/man/3/clock_gettime
-/// [__wasi_clock_time_get (Realtime Clock)]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/docs.md#clock_time_get
+/// [__wasi_clock_time_get (Realtime Clock)]: https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#clock_time_get
 /// [GetSystemTimePreciseAsFileTime]: https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsystemtimepreciseasfiletime
 /// [GetSystemTimeAsFileTime]: https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsystemtimeasfiletime
 ///
diff --git a/tests/pretty/tests-are-sorted.pp b/tests/pretty/tests-are-sorted.pp
index 58f746f2e0ef8..7d7f682130df8 100644
--- a/tests/pretty/tests-are-sorted.pp
+++ b/tests/pretty/tests-are-sorted.pp
@@ -79,6 +79,7 @@
     };
 fn a_test() {}
 #[rustc_main]
+#[no_coverage]
 pub fn main() -> () {
     extern crate test;
     test::test_main_static(&[&a_test, &m_test, &z_test])
diff --git a/tests/run-make/coverage-reports/expected_show_coverage.test_harness.txt b/tests/run-make/coverage-reports/expected_show_coverage.test_harness.txt
new file mode 100644
index 0000000000000..93bd1cfcb4897
--- /dev/null
+++ b/tests/run-make/coverage-reports/expected_show_coverage.test_harness.txt
@@ -0,0 +1,11 @@
+    1|       |// Verify that the entry point injected by the test harness doesn't cause
+    2|       |// weird artifacts in the coverage report (e.g. issue #10749).
+    3|       |
+    4|       |// compile-flags: --test
+    5|       |
+    6|       |#[allow(dead_code)]
+    7|      0|fn unused() {}
+    8|       |
+    9|      1|#[test]
+   10|      1|fn my_test() {}
+
diff --git a/tests/run-make/coverage/test_harness.rs b/tests/run-make/coverage/test_harness.rs
new file mode 100644
index 0000000000000..12a755734c198
--- /dev/null
+++ b/tests/run-make/coverage/test_harness.rs
@@ -0,0 +1,10 @@
+// Verify that the entry point injected by the test harness doesn't cause
+// weird artifacts in the coverage report (e.g. issue #10749).
+
+// compile-flags: --test
+
+#[allow(dead_code)]
+fn unused() {}
+
+#[test]
+fn my_test() {}
diff --git a/tests/ui/borrowck/tainted-promoteds.rs b/tests/ui/borrowck/tainted-promoteds.rs
new file mode 100644
index 0000000000000..2b6f0ddbd6c7f
--- /dev/null
+++ b/tests/ui/borrowck/tainted-promoteds.rs
@@ -0,0 +1,12 @@
+// Regression test for issue #110856, where a borrowck error for a MIR tainted
+// all promoteds within. This in turn generated a spurious "erroneous constant
+// used" note when trying to evaluate a promoted.
+
+pub fn f() -> u32 {
+    let a = 0;
+    a = &0 * &1 * &2 * &3;
+    //~^ ERROR: cannot assign twice to immutable variable
+    a
+}
+
+fn main() {}
diff --git a/tests/ui/borrowck/tainted-promoteds.stderr b/tests/ui/borrowck/tainted-promoteds.stderr
new file mode 100644
index 0000000000000..b276ea9acebe9
--- /dev/null
+++ b/tests/ui/borrowck/tainted-promoteds.stderr
@@ -0,0 +1,14 @@
+error[E0384]: cannot assign twice to immutable variable `a`
+  --> $DIR/tainted-promoteds.rs:7:5
+   |
+LL |     let a = 0;
+   |         -
+   |         |
+   |         first assignment to `a`
+   |         help: consider making this binding mutable: `mut a`
+LL |     a = &0 * &1 * &2 * &3;
+   |     ^^^^^^^^^^^^^^^^^^^^^ cannot assign twice to immutable variable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0384`.