Rollup of 6 pull requests

bootstrap.example.toml

@@ -1,7 +1,7 @@
 # Sample TOML configuration file for building Rust.
 #
 # To configure bootstrap, run `./configure` or `./x.py setup`.
-# See https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html#create-a-configtoml for more information.
+# See https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html#create-a-bootstraptoml for more information.
 #
 # All options are commented out by default in this file, and they're commented
 # out with their default values. The build system by default looks for
@@ -446,7 +446,7 @@
 # a specific version.
 #ccache = false
 
-# List of paths to exclude from the build and test processes. 
+# List of paths to exclude from the build and test processes.
 # For example, exclude = ["tests/ui", "src/tools/tidy"].
 #exclude = []
 

compiler/rustc_resolve/src/late.rs

@@ -272,7 +272,7 @@ impl RibKind<'_> {
 /// resolving, the name is looked up from inside out.
 #[derive(Debug)]
 pub(crate) struct Rib<'ra, R = Res> {
-    pub bindings: FxHashMap<Ident, R>,
+    pub bindings: FxIndexMap<Ident, R>,
     pub patterns_with_skipped_bindings: UnordMap<DefId, Vec<(Span, Result<(), ErrorGuaranteed>)>>,
     pub kind: RibKind<'ra>,
 }
@@ -1642,8 +1642,8 @@ impl<'a, 'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'a, 'ast, 'ra, 'tcx> {
 
                         // Allow all following defaults to refer to this type parameter.
                         let i = &Ident::with_dummy_span(param.ident.name);
-                        forward_ty_ban_rib.bindings.remove(i);
-                        forward_ty_ban_rib_const_param_ty.bindings.remove(i);
+                        forward_ty_ban_rib.bindings.swap_remove(i);
+                        forward_ty_ban_rib_const_param_ty.bindings.swap_remove(i);
                     }
                     GenericParamKind::Const { ref ty, kw_span: _, ref default } => {
                         // Const parameters can't have param bounds.
@@ -1678,8 +1678,8 @@ impl<'a, 'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'a, 'ast, 'ra, 'tcx> {
 
                         // Allow all following defaults to refer to this const parameter.
                         let i = &Ident::with_dummy_span(param.ident.name);
-                        forward_const_ban_rib.bindings.remove(i);
-                        forward_const_ban_rib_const_param_ty.bindings.remove(i);
+                        forward_const_ban_rib.bindings.swap_remove(i);
+                        forward_const_ban_rib_const_param_ty.bindings.swap_remove(i);
                     }
                 }
             }
@@ -2888,7 +2888,6 @@ impl<'a, 'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'a, 'ast, 'ra, 'tcx> {
                         break;
                     }
 
-                    #[allow(rustc::potential_query_instability)] // FIXME
                     seen_bindings
                         .extend(parent_rib.bindings.keys().map(|ident| (*ident, ident.span)));
                 }
@@ -4003,7 +4002,7 @@ impl<'a, 'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'a, 'ast, 'ra, 'tcx> {
         }
     }
 
-    fn innermost_rib_bindings(&mut self, ns: Namespace) -> &mut FxHashMap<Ident, Res> {
+    fn innermost_rib_bindings(&mut self, ns: Namespace) -> &mut FxIndexMap<Ident, Res> {
         &mut self.ribs[ns].last_mut().unwrap().bindings
     }
 

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -830,7 +830,6 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
         if let Some(rib) = &self.last_block_rib
             && let RibKind::Normal = rib.kind
         {
-            #[allow(rustc::potential_query_instability)] // FIXME
             for (ident, &res) in &rib.bindings {
                 if let Res::Local(_) = res
                     && path.len() == 1
@@ -1019,7 +1018,6 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
         if let Some(err_code) = err.code {
             if err_code == E0425 {
                 for label_rib in &self.label_ribs {
-                    #[allow(rustc::potential_query_instability)] // FIXME
                     for (label_ident, node_id) in &label_rib.bindings {
                         let ident = path.last().unwrap().ident;
                         if format!("'{ident}") == label_ident.to_string() {
@@ -2265,7 +2263,6 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
                 };
 
                 // Locals and type parameters
-                #[allow(rustc::potential_query_instability)] // FIXME
                 for (ident, &res) in &rib.bindings {
                     if filter_fn(res) && ident.span.ctxt() == rib_ctxt {
                         names.push(TypoSuggestion::typo_from_ident(*ident, res));
@@ -2793,7 +2790,6 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
         let within_scope = self.is_label_valid_from_rib(rib_index);
 
         let rib = &self.label_ribs[rib_index];
-        #[allow(rustc::potential_query_instability)] // FIXME
         let names = rib
             .bindings
             .iter()
@@ -2805,7 +2801,6 @@ impl<'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> {
             // Upon finding a similar name, get the ident that it was from - the span
             // contained within helps make a useful diagnostic. In addition, determine
             // whether this candidate is within scope.
-            #[allow(rustc::potential_query_instability)] // FIXME
             let (ident, _) = rib.bindings.iter().find(|(ident, _)| ident.name == symbol).unwrap();
             (*ident, within_scope)
         })

library/std/src/net/tcp/tests.rs

@@ -315,12 +315,8 @@ fn read_buf() {
         let mut buf = BorrowedBuf::from(buf.as_mut_slice());
         t!(s.read_buf(buf.unfilled()));
         assert_eq!(buf.filled(), &[1, 2, 3, 4]);
-
-        // FIXME: sgx uses default_read_buf that initializes the buffer.
-        if cfg!(not(target_env = "sgx")) {
-            // TcpStream::read_buf should omit buffer initialization.
-            assert_eq!(buf.init_len(), 4);
-        }
+        // TcpStream::read_buf should omit buffer initialization.
+        assert_eq!(buf.init_len(), 4);
 
         t.join().ok().expect("thread panicked");
     })

library/std/src/sys/pal/uefi/helpers.rs

@@ -120,39 +120,6 @@ pub(crate) fn open_protocol<T>(
     }
 }
 
-pub(crate) fn create_event(
-    signal: u32,
-    tpl: efi::Tpl,
-    handler: Option<efi::EventNotify>,
-    context: *mut crate::ffi::c_void,
-) -> io::Result<NonNull<crate::ffi::c_void>> {
-    let boot_services: NonNull<efi::BootServices> =
-        boot_services().ok_or(BOOT_SERVICES_UNAVAILABLE)?.cast();
-    let mut event: r_efi::efi::Event = crate::ptr::null_mut();
-    let r = unsafe {
-        let create_event = (*boot_services.as_ptr()).create_event;
-        (create_event)(signal, tpl, handler, context, &mut event)
-    };
-    if r.is_error() {
-        Err(crate::io::Error::from_raw_os_error(r.as_usize()))
-    } else {
-        NonNull::new(event).ok_or(const_error!(io::ErrorKind::Other, "null protocol"))
-    }
-}
-
-/// # SAFETY
-/// - The supplied event must be valid
-pub(crate) unsafe fn close_event(evt: NonNull<crate::ffi::c_void>) -> io::Result<()> {
-    let boot_services: NonNull<efi::BootServices> =
-        boot_services().ok_or(BOOT_SERVICES_UNAVAILABLE)?.cast();
-    let r = unsafe {
-        let close_event = (*boot_services.as_ptr()).close_event;
-        (close_event)(evt.as_ptr())
-    };
-
-    if r.is_error() { Err(crate::io::Error::from_raw_os_error(r.as_usize())) } else { Ok(()) }
-}
-
 /// Gets the Protocol for current system handle.
 ///
 /// Note: Some protocols need to be manually freed. It is the caller's responsibility to do so.
@@ -735,3 +702,56 @@ impl Drop for ServiceProtocol {
         }
     }
 }
+
+#[repr(transparent)]
+pub(crate) struct OwnedEvent(NonNull<crate::ffi::c_void>);
+
+impl OwnedEvent {
+    pub(crate) fn new(
+        signal: u32,
+        tpl: efi::Tpl,
+        handler: Option<efi::EventNotify>,
+        context: Option<NonNull<crate::ffi::c_void>>,
+    ) -> io::Result<Self> {
+        let boot_services: NonNull<efi::BootServices> =
+            boot_services().ok_or(BOOT_SERVICES_UNAVAILABLE)?.cast();
+        let mut event: r_efi::efi::Event = crate::ptr::null_mut();
+        let context = context.map(NonNull::as_ptr).unwrap_or(crate::ptr::null_mut());
+
+        let r = unsafe {
+            let create_event = (*boot_services.as_ptr()).create_event;
+            (create_event)(signal, tpl, handler, context, &mut event)
+        };
+
+        if r.is_error() {
+            Err(crate::io::Error::from_raw_os_error(r.as_usize()))
+        } else {
+            NonNull::new(event)
+                .ok_or(const_error!(io::ErrorKind::Other, "failed to create event"))
+                .map(Self)
+        }
+    }
+
+    pub(crate) fn into_raw(self) -> *mut crate::ffi::c_void {
+        let r = self.0.as_ptr();
+        crate::mem::forget(self);
+        r
+    }
+
+    /// SAFETY: Assumes that ptr is a non-null valid UEFI event
+    pub(crate) unsafe fn from_raw(ptr: *mut crate::ffi::c_void) -> Self {
+        Self(unsafe { NonNull::new_unchecked(ptr) })
+    }
+}
+
+impl Drop for OwnedEvent {
+    fn drop(&mut self) {
+        if let Some(boot_services) = boot_services() {
+            let bt: NonNull<r_efi::efi::BootServices> = boot_services.cast();
+            unsafe {
+                let close_event = (*bt.as_ptr()).close_event;
+                (close_event)(self.0.as_ptr())
+            };
+        }
+    }
+}

library/std/src/sys/pal/uefi/mod.rs

@@ -47,17 +47,17 @@ pub(crate) unsafe fn init(argc: isize, argv: *const *const u8, _sigpipe: u8) {
     unsafe { uefi::env::init_globals(image_handle, system_table) };
 
     // Register exit boot services handler
-    match helpers::create_event(
+    match helpers::OwnedEvent::new(
         r_efi::efi::EVT_SIGNAL_EXIT_BOOT_SERVICES,
         r_efi::efi::TPL_NOTIFY,
         Some(exit_boot_service_handler),
-        crate::ptr::null_mut(),
+        None,
     ) {
         Ok(x) => {
             if EXIT_BOOT_SERVICE_EVENT
                 .compare_exchange(
                     crate::ptr::null_mut(),
-                    x.as_ptr(),
+                    x.into_raw(),
                     Ordering::Release,
                     Ordering::Acquire,
                 )
@@ -77,7 +77,7 @@ pub unsafe fn cleanup() {
     if let Some(exit_boot_service_event) =
         NonNull::new(EXIT_BOOT_SERVICE_EVENT.swap(crate::ptr::null_mut(), Ordering::Acquire))
     {
-        let _ = unsafe { helpers::close_event(exit_boot_service_event) };
+        let _ = unsafe { helpers::OwnedEvent::from_raw(exit_boot_service_event.as_ptr()) };
     }
 }
 
@@ -143,7 +143,7 @@ pub fn abort_internal() -> ! {
     if let Some(exit_boot_service_event) =
         NonNull::new(EXIT_BOOT_SERVICE_EVENT.load(Ordering::Acquire))
     {
-        let _ = unsafe { helpers::close_event(exit_boot_service_event) };
+        let _ = unsafe { helpers::OwnedEvent::from_raw(exit_boot_service_event.as_ptr()) };
     }
 
     if let (Some(boot_services), Some(handle)) =

src/librustdoc/clean/cfg.rs

@@ -8,7 +8,6 @@ use std::{mem, ops};
 
 use rustc_ast::{LitKind, MetaItem, MetaItemInner, MetaItemKind, MetaItemLit};
 use rustc_data_structures::fx::FxHashSet;
-use rustc_feature::Features;
 use rustc_session::parse::ParseSess;
 use rustc_span::Span;
 use rustc_span::symbol::{Symbol, sym};
@@ -132,18 +131,13 @@ impl Cfg {
     /// Checks whether the given configuration can be matched in the current session.
     ///
     /// Equivalent to `attr::cfg_matches`.
-    // FIXME: Actually make use of `features`.
-    pub(crate) fn matches(&self, psess: &ParseSess, features: Option<&Features>) -> bool {
+    pub(crate) fn matches(&self, psess: &ParseSess) -> bool {
         match *self {
             Cfg::False => false,
             Cfg::True => true,
-            Cfg::Not(ref child) => !child.matches(psess, features),
-            Cfg::All(ref sub_cfgs) => {
-                sub_cfgs.iter().all(|sub_cfg| sub_cfg.matches(psess, features))
-            }
-            Cfg::Any(ref sub_cfgs) => {
-                sub_cfgs.iter().any(|sub_cfg| sub_cfg.matches(psess, features))
-            }
+            Cfg::Not(ref child) => !child.matches(psess),
+            Cfg::All(ref sub_cfgs) => sub_cfgs.iter().all(|sub_cfg| sub_cfg.matches(psess)),
+            Cfg::Any(ref sub_cfgs) => sub_cfgs.iter().any(|sub_cfg| sub_cfg.matches(psess)),
             Cfg::Cfg(name, value) => psess.config.contains(&(name, value)),
         }
     }

src/librustdoc/clean/types.rs

@@ -1068,6 +1068,13 @@ pub(crate) fn extract_cfg_from_attrs<'a, I: Iterator<Item = &'a hir::Attribute>
                         .meta_item()
                         .and_then(|item| rustc_expand::config::parse_cfg(item, sess))
                     {
+                        // The result is unused here but we can gate unstable predicates
+                        rustc_attr_parsing::cfg_matches(
+                            cfg_mi,
+                            tcx.sess,
+                            rustc_ast::CRATE_NODE_ID,
+                            Some(tcx.features()),
+                        );
                         match Cfg::parse(cfg_mi) {
                             Ok(new_cfg) => cfg &= new_cfg,
                             Err(e) => {

src/librustdoc/doctest/rust.rs

@@ -98,7 +98,7 @@ impl HirCollector<'_> {
         let ast_attrs = self.tcx.hir_attrs(self.tcx.local_def_id_to_hir_id(def_id));
         if let Some(ref cfg) =
             extract_cfg_from_attrs(ast_attrs.iter(), self.tcx, &FxHashSet::default())
-            && !cfg.matches(&self.tcx.sess.psess, Some(self.tcx.features()))
+            && !cfg.matches(&self.tcx.sess.psess)
         {
             return;
         }

tests/rustdoc-ui/doc-cfg-check-cfg.rs

@@ -0,0 +1,16 @@
+// Ensure that `doc(cfg())` respects `check-cfg`
+// Currently not properly working
+#![feature(doc_cfg)]
+#![deny(unexpected_cfgs)]
+
+//@revisions: no_check cfg_empty cfg_foo
+//@[cfg_empty] compile-flags: --check-cfg cfg()
+//@[cfg_foo] compile-flags: --check-cfg cfg(foo)
+
+//@[no_check] check-pass
+//@[cfg_empty] check-pass
+//@[cfg_empty] known-bug: #138358
+//@[cfg_foo] check-pass
+
+#[doc(cfg(foo))]
+pub fn foo() {}

tests/rustdoc-ui/doc-cfg-unstable.rs

@@ -0,0 +1,10 @@
+// #138113: rustdoc didn't gate unstable predicates inside `doc(cfg(..))`
+#![feature(doc_cfg)]
+
+// `cfg_boolean_literals`
+#[doc(cfg(false))] //~ ERROR `cfg(false)` is experimental and subject to change
+pub fn cfg_boolean_literals() {}
+
+// `cfg_version`
+#[doc(cfg(sanitize = "thread"))] //~ ERROR `cfg(sanitize)` is experimental and subject to change
+pub fn cfg_sanitize() {}

tests/rustdoc-ui/doc-cfg-unstable.stderr

@@ -0,0 +1,23 @@
+error[E0658]: `cfg(false)` is experimental and subject to change
+  --> $DIR/doc-cfg-unstable.rs:5:11
+   |
+LL | #[doc(cfg(false))]
+   |           ^^^^^
+   |
+   = note: see issue #131204 <https://github.com/rust-lang/rust/issues/131204> for more information
+   = help: add `#![feature(cfg_boolean_literals)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error[E0658]: `cfg(sanitize)` is experimental and subject to change
+  --> $DIR/doc-cfg-unstable.rs:9:11
+   |
+LL | #[doc(cfg(sanitize = "thread"))]
+   |           ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #39699 <https://github.com/rust-lang/rust/issues/39699> for more information
+   = help: add `#![feature(cfg_sanitize)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/fn/trait-fn-generic-mismatch.rs

@@ -0,0 +1,12 @@
+fn retry() -> impl Sized {}
+
+struct Core<T>(T);
+
+impl Core<XXX> { //~ ERROR cannot find type `XXX` in this scope
+    pub fn spawn(self) {}
+}
+
+fn main() {
+    let core = Core(1);
+    core.spawn(retry()); //~ ERROR this method takes 0 arguments but 1 argument was supplied
+}

tests/ui/fn/trait-fn-generic-mismatch.stderr

@@ -0,0 +1,32 @@
+error[E0412]: cannot find type `XXX` in this scope
+  --> $DIR/trait-fn-generic-mismatch.rs:5:11
+   |
+LL | impl Core<XXX> {
+   |           ^^^ not found in this scope
+   |
+help: you might be missing a type parameter
+   |
+LL | impl<XXX> Core<XXX> {
+   |     +++++
+
+error[E0061]: this method takes 0 arguments but 1 argument was supplied
+  --> $DIR/trait-fn-generic-mismatch.rs:11:10
+   |
+LL |     core.spawn(retry());
+   |          ^^^^^ ------- unexpected argument of type `impl Sized`
+   |
+note: method defined here
+  --> $DIR/trait-fn-generic-mismatch.rs:6:12
+   |
+LL |     pub fn spawn(self) {}
+   |            ^^^^^
+help: remove the extra argument
+   |
+LL -     core.spawn(retry());
+LL +     core.spawn();
+   |
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0061, E0412.
+For more information about an error, try `rustc --explain E0061`.