Rollup of 7 pull requests

compiler/rustc_builtin_macros/src/edition_panic.rs

@@ -74,11 +74,11 @@ pub(crate) fn use_panic_2021(mut span: Span) -> bool {
     // (To avoid using the edition of e.g. the assert!() or debug_assert!() definition.)
     loop {
         let expn = span.ctxt().outer_expn_data();
-        if let Some(features) = expn.allow_internal_unstable {
-            if features.iter().any(|&f| f == sym::edition_panic) {
-                span = expn.call_site;
-                continue;
-            }
+        if let Some(features) = expn.allow_internal_unstable
+            && features.contains(&sym::edition_panic)
+        {
+            span = expn.call_site;
+            continue;
         }
         break expn.edition >= Edition::Edition2021;
     }

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -2186,7 +2186,7 @@ fn msvc_imps_needed(tcx: TyCtxt<'_>) -> bool {
     // indirectly from ThinLTO. In theory these are not needed as ThinLTO could resolve
     // these, but it currently does not do so.
     let can_have_static_objects =
-        tcx.sess.lto() == Lto::Thin || tcx.crate_types().iter().any(|ct| *ct == CrateType::Rlib);
+        tcx.sess.lto() == Lto::Thin || tcx.crate_types().contains(&CrateType::Rlib);
 
     tcx.sess.target.is_like_windows &&
     can_have_static_objects   &&

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -604,7 +604,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
     if let Some((name, _)) = lang_items::extract(attrs)
         && let Some(lang_item) = LangItem::from_name(name)
     {
-        if WEAK_LANG_ITEMS.iter().any(|&l| l == lang_item) {
+        if WEAK_LANG_ITEMS.contains(&lang_item) {
             codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL;
         }
         if let Some(link_name) = lang_item.link_name() {

compiler/rustc_hir_typeck/src/upvar.rs

@@ -18,12 +18,12 @@
 //! from there).
 //!
 //! The fact that we are inferring borrow kinds as we go results in a
-//! semi-hacky interaction with mem-categorization. In particular,
-//! mem-categorization will query the current borrow kind as it
-//! categorizes, and we'll return the *current* value, but this may get
+//! semi-hacky interaction with the way `ExprUseVisitor` is computing
+//! `Place`s. In particular, it will query the current borrow kind as it
+//! goes, and we'll return the *current* value, but this may get
 //! adjusted later. Therefore, in this module, we generally ignore the
-//! borrow kind (and derived mutabilities) that are returned from
-//! mem-categorization, since they may be inaccurate. (Another option
+//! borrow kind (and derived mutabilities) that `ExprUseVisitor` returns
+//! within `Place`s, since they may be inaccurate. (Another option
 //! would be to use a unification scheme, where instead of returning a
 //! concrete borrow kind like `ty::ImmBorrow`, we return a
 //! `ty::InferBorrow(upvar_id)` or something like that, but this would

compiler/rustc_middle/src/hir/place.rs

@@ -53,7 +53,10 @@ pub struct Projection<'tcx> {
     pub kind: ProjectionKind,
 }
 
-/// A `Place` represents how a value is located in memory.
+/// A `Place` represents how a value is located in memory. This does not
+/// always correspond to a syntactic place expression. For example, when
+/// processing a pattern, a `Place` can be used to refer to the sub-value
+/// currently being inspected.
 ///
 /// This is an HIR version of [`rustc_middle::mir::Place`].
 #[derive(Clone, Debug, PartialEq, Eq, Hash, TyEncodable, TyDecodable, HashStable)]
@@ -67,7 +70,10 @@ pub struct Place<'tcx> {
     pub projections: Vec<Projection<'tcx>>,
 }
 
-/// A `PlaceWithHirId` represents how a value is located in memory.
+/// A `PlaceWithHirId` represents how a value is located in memory. This does not
+/// always correspond to a syntactic place expression. For example, when
+/// processing a pattern, a `Place` can be used to refer to the sub-value
+/// currently being inspected.
 ///
 /// This is an HIR version of [`rustc_middle::mir::Place`].
 #[derive(Clone, Debug, PartialEq, Eq, Hash, TyEncodable, TyDecodable, HashStable)]

compiler/rustc_mir_build/src/builder/scope.rs

@@ -1496,7 +1496,7 @@ fn build_scope_drops<'tcx>(
                 // path, then don't generate the drop. (We only take this into
                 // account for non-unwind paths so as not to disturb the
                 // caching mechanism.)
-                if scope.moved_locals.iter().any(|&o| o == local) {
+                if scope.moved_locals.contains(&local) {
                     continue;
                 }
 

compiler/rustc_passes/src/entry.rs

@@ -24,7 +24,7 @@ struct EntryContext<'tcx> {
 }
 
 fn entry_fn(tcx: TyCtxt<'_>, (): ()) -> Option<(DefId, EntryFnType)> {
-    let any_exe = tcx.crate_types().iter().any(|ty| *ty == CrateType::Executable);
+    let any_exe = tcx.crate_types().contains(&CrateType::Executable);
     if !any_exe {
         // No need to find a main function.
         return None;

compiler/rustc_session/src/utils.rs

@@ -149,14 +149,15 @@ pub fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
                 arg[a.len()..].to_string()
             };
             let option = content.split_once('=').map(|s| s.0).unwrap_or(&content);
-            if ICE_REPORT_COMPILER_FLAGS_EXCLUDE.iter().any(|exc| option == *exc) {
+            if ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&option) {
                 excluded_cargo_defaults = true;
             } else {
                 result.push(a.to_string());
-                match ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.iter().find(|s| option == **s) {
-                    Some(s) => result.push(format!("{s}=[REDACTED]")),
-                    None => result.push(content),
-                }
+                result.push(if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&option) {
+                    format!("{option}=[REDACTED]")
+                } else {
+                    content
+                });
             }
         }
     }

compiler/rustc_span/src/lib.rs

@@ -876,7 +876,7 @@ impl Span {
         self.ctxt()
             .outer_expn_data()
             .allow_internal_unstable
-            .is_some_and(|features| features.iter().any(|&f| f == feature))
+            .is_some_and(|features| features.contains(&feature))
     }
 
     /// Checks if this span arises from a compiler desugaring of kind `kind`.

compiler/stable_mir/src/mir/body.rs

@@ -1057,8 +1057,7 @@ impl Place {
     /// In order to retrieve the correct type, the `locals` argument must match the list of all
     /// locals from the function body where this place originates from.
     pub fn ty(&self, locals: &[LocalDecl]) -> Result<Ty, Error> {
-        let start_ty = locals[self.local].ty;
-        self.projection.iter().fold(Ok(start_ty), |place_ty, elem| elem.ty(place_ty?))
+        self.projection.iter().try_fold(locals[self.local].ty, |place_ty, elem| elem.ty(place_ty))
     }
 }
 

compiler/stable_mir/src/mir/visit.rs

@@ -563,7 +563,7 @@ pub struct PlaceRef<'a> {
 impl PlaceRef<'_> {
     /// Get the type of this place.
     pub fn ty(&self, locals: &[LocalDecl]) -> Result<Ty, Error> {
-        self.projection.iter().fold(Ok(locals[self.local].ty), |place_ty, elem| elem.ty(place_ty?))
+        self.projection.iter().try_fold(locals[self.local].ty, |place_ty, elem| elem.ty(place_ty))
     }
 }
 

library/coretests/tests/pin_macro.rs

@@ -47,3 +47,14 @@ fn temp_lifetime() {
     }
     async fn foo(_: &mut usize) {}
 }
+
+#[test]
+fn transitive_extension() {
+    async fn temporary() {}
+
+    // `pin!` witnessed in the wild being used like this, even if it yields
+    // a `Pin<&mut &mut impl Unpin>`; it does work because `pin!`
+    // happens to transitively extend the lifespan of `temporary()`.
+    let p = pin!(&mut temporary());
+    let _use = p;
+}

library/std/src/sys/fs/unix.rs

@@ -155,15 +155,15 @@ cfg_has_statx! {{
         enum STATX_STATE{ Unknown = 0, Present, Unavailable }
         static STATX_SAVED_STATE: AtomicU8 = AtomicU8::new(STATX_STATE::Unknown as u8);
 
-        syscall! {
+        syscall!(
             fn statx(
                 fd: c_int,
                 pathname: *const c_char,
                 flags: c_int,
                 mask: libc::c_uint,
-                statxbuf: *mut libc::statx
-            ) -> c_int
-        }
+                statxbuf: *mut libc::statx,
+            ) -> c_int;
+        );
 
         let statx_availability = STATX_SAVED_STATE.load(Ordering::Relaxed);
         if statx_availability == STATX_STATE::Unavailable as u8 {
@@ -1540,7 +1540,9 @@ impl File {
                 let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
                 // futimens requires Android API level 19
                 cvt(unsafe {
-                    weak!(fn futimens(c_int, *const libc::timespec) -> c_int);
+                    weak!(
+                        fn futimens(fd: c_int, times: *const libc::timespec) -> c_int;
+                    );
                     match futimens.get() {
                         Some(futimens) => futimens(self.as_raw_fd(), times.as_ptr()),
                         None => return Err(io::const_error!(
@@ -1556,7 +1558,9 @@ impl File {
                     use crate::sys::{time::__timespec64, weak::weak};
 
                     // Added in glibc 2.34
-                    weak!(fn __futimens64(libc::c_int, *const __timespec64) -> libc::c_int);
+                    weak!(
+                        fn __futimens64(fd: c_int, times: *const __timespec64) -> c_int;
+                    );
 
                     if let Some(futimens64) = __futimens64.get() {
                         let to_timespec = |time: Option<SystemTime>| time.map(|time| time.t.to_timespec64())

library/std/src/sys/pal/unix/fd.rs

@@ -232,14 +232,14 @@ impl FileDesc {
     // implementation if `preadv` is not available.
     #[cfg(all(target_os = "android", target_pointer_width = "64"))]
     pub fn read_vectored_at(&self, bufs: &mut [IoSliceMut<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::syscall! {
+        super::weak::syscall!(
             fn preadv(
                 fd: libc::c_int,
                 iovec: *const libc::iovec,
                 n_iovec: libc::c_int,
-                offset: off64_t
-            ) -> isize
-        }
+                offset: off64_t,
+            ) -> isize;
+        );
 
         let ret = cvt(unsafe {
             preadv(
@@ -257,7 +257,14 @@ impl FileDesc {
     // and its metadata from LLVM IR.
     #[no_sanitize(cfi)]
     pub fn read_vectored_at(&self, bufs: &mut [IoSliceMut<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::weak!(fn preadv64(libc::c_int, *const libc::iovec, libc::c_int, off64_t) -> isize);
+        super::weak::weak!(
+            fn preadv64(
+                fd: libc::c_int,
+                iovec: *const libc::iovec,
+                n_iovec: libc::c_int,
+                offset: off64_t,
+            ) -> isize;
+        );
 
         match preadv64.get() {
             Some(preadv) => {
@@ -286,7 +293,14 @@ impl FileDesc {
     // use "weak" linking.
     #[cfg(target_vendor = "apple")]
     pub fn read_vectored_at(&self, bufs: &mut [IoSliceMut<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::weak!(fn preadv(libc::c_int, *const libc::iovec, libc::c_int, off64_t) -> isize);
+        super::weak::weak!(
+            fn preadv(
+                fd: libc::c_int,
+                iovec: *const libc::iovec,
+                n_iovec: libc::c_int,
+                offset: off64_t,
+            ) -> isize;
+        );
 
         match preadv.get() {
             Some(preadv) => {
@@ -428,14 +442,14 @@ impl FileDesc {
     // implementation if `pwritev` is not available.
     #[cfg(all(target_os = "android", target_pointer_width = "64"))]
     pub fn write_vectored_at(&self, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::syscall! {
+        super::weak::syscall!(
             fn pwritev(
                 fd: libc::c_int,
                 iovec: *const libc::iovec,
                 n_iovec: libc::c_int,
-                offset: off64_t
-            ) -> isize
-        }
+                offset: off64_t,
+            ) -> isize;
+        );
 
         let ret = cvt(unsafe {
             pwritev(
@@ -450,7 +464,14 @@ impl FileDesc {
 
     #[cfg(all(target_os = "android", target_pointer_width = "32"))]
     pub fn write_vectored_at(&self, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::weak!(fn pwritev64(libc::c_int, *const libc::iovec, libc::c_int, off64_t) -> isize);
+        super::weak::weak!(
+            fn pwritev64(
+                fd: libc::c_int,
+                iovec: *const libc::iovec,
+                n_iovec: libc::c_int,
+                offset: off64_t,
+            ) -> isize;
+        );
 
         match pwritev64.get() {
             Some(pwritev) => {
@@ -479,7 +500,14 @@ impl FileDesc {
     // use "weak" linking.
     #[cfg(target_vendor = "apple")]
     pub fn write_vectored_at(&self, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
-        super::weak::weak!(fn pwritev(libc::c_int, *const libc::iovec, libc::c_int, off64_t) -> isize);
+        super::weak::weak!(
+            fn pwritev(
+                fd: libc::c_int,
+                iovec: *const libc::iovec,
+                n_iovec: libc::c_int,
+                offset: off64_t,
+            ) -> isize;
+        );
 
         match pwritev.get() {
             Some(pwritev) => {

library/std/src/sys/pal/unix/kernel_copy.rs

@@ -604,16 +604,16 @@ pub(super) fn copy_regular_files(reader: RawFd, writer: RawFd, max_len: u64) ->
         _ => true,
     };
 
-    syscall! {
+    syscall!(
         fn copy_file_range(
             fd_in: libc::c_int,
             off_in: *mut libc::loff_t,
             fd_out: libc::c_int,
             off_out: *mut libc::loff_t,
             len: libc::size_t,
-            flags: libc::c_uint
-        ) -> libc::ssize_t
-    }
+            flags: libc::c_uint,
+        ) -> libc::ssize_t;
+    );
 
     fn probe_copy_file_range_support() -> u8 {
         // In some cases, we cannot determine availability from the first
@@ -727,16 +727,16 @@ fn sendfile_splice(mode: SpliceMode, reader: RawFd, writer: RawFd, len: u64) ->
     // Android builds use feature level 14, but the libc wrapper for splice is
     // gated on feature level 21+, so we have to invoke the syscall directly.
     #[cfg(target_os = "android")]
-    syscall! {
+    syscall!(
         fn splice(
             srcfd: libc::c_int,
             src_offset: *const i64,
             dstfd: libc::c_int,
             dst_offset: *const i64,
             len: libc::size_t,
-            flags: libc::c_int
-        ) -> libc::ssize_t
-    }
+            flags: libc::c_int,
+        ) -> libc::ssize_t;
+    );
 
     #[cfg(target_os = "linux")]
     use libc::splice;

library/std/src/sys/pal/unix/stack_overflow.rs

@@ -424,18 +424,32 @@ mod imp {
 
         let pages = PAGES.get_or_init(|| {
             use crate::sys::weak::dlsym;
-            dlsym!(fn sysctlbyname(*const libc::c_char, *mut libc::c_void, *mut libc::size_t, *const libc::c_void, libc::size_t) -> libc::c_int);
+            dlsym!(
+                fn sysctlbyname(
+                    name: *const libc::c_char,
+                    oldp: *mut libc::c_void,
+                    oldlenp: *mut libc::size_t,
+                    newp: *const libc::c_void,
+                    newlen: libc::size_t,
+                ) -> libc::c_int;
+            );
             let mut guard: usize = 0;
             let mut size = size_of_val(&guard);
             let oid = c"security.bsd.stack_guard_page";
             match sysctlbyname.get() {
-                Some(fcn) if unsafe {
-                    fcn(oid.as_ptr(),
-                        (&raw mut guard).cast(),
-                        &raw mut size,
-                        ptr::null_mut(),
-                        0) == 0
-                } => guard,
+                Some(fcn)
+                    if unsafe {
+                        fcn(
+                            oid.as_ptr(),
+                            (&raw mut guard).cast(),
+                            &raw mut size,
+                            ptr::null_mut(),
+                            0,
+                        ) == 0
+                    } =>
+                {
+                    guard
+                }
                 _ => 1,
             }
         });