Rollup of 7 pull requests

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -26,10 +26,9 @@ use rustc_hir::def::{CtorOf, DefKind, Namespace, Res};
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::intravisit::{walk_generics, Visitor as _};
 use rustc_hir::{GenericArg, GenericArgs, OpaqueTyOrigin};
-use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
+use rustc_infer::infer::{InferCtxt, InferOk, TyCtxtInferExt};
 use rustc_infer::traits::ObligationCause;
 use rustc_middle::middle::stability::AllowUnstable;
-use rustc_middle::ty::fold::FnMutDelegate;
 use rustc_middle::ty::subst::{self, GenericArgKind, InternalSubsts, SubstsRef};
 use rustc_middle::ty::GenericParamDefKind;
 use rustc_middle::ty::{self, Const, IsSuggestable, Ty, TyCtxt, TypeVisitableExt};
@@ -43,7 +42,10 @@ use rustc_trait_selection::traits::error_reporting::{
     report_object_safety_error, suggestions::NextTypeParamName,
 };
 use rustc_trait_selection::traits::wf::object_region_bounds;
-use rustc_trait_selection::traits::{self, astconv_object_safety_violations, ObligationCtxt};
+use rustc_trait_selection::traits::{
+    self, astconv_object_safety_violations, NormalizeExt, ObligationCtxt,
+};
+use rustc_type_ir::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 
 use smallvec::{smallvec, SmallVec};
 use std::collections::BTreeSet;
@@ -2442,6 +2444,11 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             return Ok(None);
         }
 
+        if !tcx.features().inherent_associated_types {
+            tcx.sess
+                .delay_span_bug(span, "found inherent assoc type without the feature being gated");
+        }
+
         //
         // Select applicable inherent associated type candidates modulo regions.
         //
@@ -2465,30 +2472,61 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
 
         let mut fulfillment_errors = Vec::new();
         let mut applicable_candidates: Vec<_> = infcx.probe(|_| {
-            let universe = infcx.create_next_universe();
-
             // Regions are not considered during selection.
-            // FIXME(non_lifetime_binders): Here we are "truncating" or "flattening" the universes
-            // of type and const binders. Is that correct in the selection phase? See also #109505.
-            let self_ty = tcx.replace_escaping_bound_vars_uncached(
-                self_ty,
-                FnMutDelegate {
-                    regions: &mut |_| tcx.lifetimes.re_erased,
-                    types: &mut |bv| {
-                        tcx.mk_placeholder(ty::PlaceholderType { universe, bound: bv })
-                    },
-                    consts: &mut |bv, ty| {
-                        tcx.mk_const(ty::PlaceholderConst { universe, bound: bv }, ty)
-                    },
-                },
-            );
+            let self_ty = self_ty
+                .fold_with(&mut BoundVarEraser { tcx, universe: infcx.create_next_universe() });
+
+            struct BoundVarEraser<'tcx> {
+                tcx: TyCtxt<'tcx>,
+                universe: ty::UniverseIndex,
+            }
+
+            // FIXME(non_lifetime_binders): Don't assign the same universe to each placeholder.
+            impl<'tcx> TypeFolder<TyCtxt<'tcx>> for BoundVarEraser<'tcx> {
+                fn interner(&self) -> TyCtxt<'tcx> {
+                    self.tcx
+                }
+
+                fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> {
+                    if r.is_late_bound() { self.tcx.lifetimes.re_erased } else { r }
+                }
+
+                fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
+                    match *ty.kind() {
+                        ty::Bound(_, bv) => self.tcx.mk_placeholder(ty::PlaceholderType {
+                            universe: self.universe,
+                            bound: bv,
+                        }),
+                        _ => ty.super_fold_with(self),
+                    }
+                }
+
+                fn fold_const(
+                    &mut self,
+                    ct: ty::Const<'tcx>,
+                ) -> <TyCtxt<'tcx> as rustc_type_ir::Interner>::Const {
+                    assert!(!ct.ty().has_escaping_bound_vars());
+
+                    match ct.kind() {
+                        ty::ConstKind::Bound(_, bv) => self.tcx.mk_const(
+                            ty::PlaceholderConst { universe: self.universe, bound: bv },
+                            ct.ty(),
+                        ),
+                        _ => ct.super_fold_with(self),
+                    }
+                }
+            }
+
+            let InferOk { value: self_ty, obligations } =
+                infcx.at(&cause, param_env).normalize(self_ty);
 
             candidates
                 .iter()
                 .copied()
                 .filter(|&(impl_, _)| {
                     infcx.probe(|_| {
                         let ocx = ObligationCtxt::new_in_snapshot(&infcx);
+                        ocx.register_obligations(obligations.clone());
 
                         let impl_substs = infcx.fresh_substs_for_item(span, impl_);
                         let impl_ty = tcx.type_of(impl_).subst(tcx, impl_substs);

compiler/rustc_parse/messages.ftl

@@ -695,7 +695,7 @@ parse_struct_literal_body_without_path =
 
 parse_struct_literal_needing_parens =
     invalid struct literal
-    .suggestion = you might need to surround the struct literal in parentheses
+    .suggestion = you might need to surround the struct literal with parentheses
 
 parse_struct_literal_not_allowed_here = struct literals are not allowed here
     .suggestion = surround the struct literal with parentheses

compiler/rustc_parse/src/lexer/unescape_error_reporting.rs

@@ -158,7 +158,7 @@ pub(crate) fn emit_unescape_error(
 
                 diag.help(
                     "for more information, visit \
-                     <https://static.rust-lang.org/doc/master/reference.html#literals>",
+                     <https://doc.rust-lang.org/reference/tokens.html#literals>",
                 );
             }
             diag.emit();

compiler/rustc_parse/src/parser/diagnostics.rs

@@ -751,13 +751,24 @@ impl<'a> Parser<'a> {
                     tail.could_be_bare_literal = true;
                     if maybe_struct_name.is_ident() && can_be_struct_literal {
                         // Account for `if Example { a: one(), }.is_pos() {}`.
-                        Err(self.sess.create_err(StructLiteralNeedingParens {
-                            span: maybe_struct_name.span.to(expr.span),
-                            sugg: StructLiteralNeedingParensSugg {
-                                before: maybe_struct_name.span.shrink_to_lo(),
-                                after: expr.span.shrink_to_hi(),
-                            },
-                        }))
+                        // expand `before` so that we take care of module path such as:
+                        // `foo::Bar { ... } `
+                        // we expect to suggest `(foo::Bar { ... })` instead of `foo::(Bar { ... })`
+                        let sm = self.sess.source_map();
+                        let before = maybe_struct_name.span.shrink_to_lo();
+                        if let Ok(extend_before) = sm.span_extend_prev_while(before, |t| {
+                            t.is_alphanumeric() || t == ':' || t == '_'
+                        }) {
+                            Err(self.sess.create_err(StructLiteralNeedingParens {
+                                span: maybe_struct_name.span.to(expr.span),
+                                sugg: StructLiteralNeedingParensSugg {
+                                    before: extend_before.shrink_to_lo(),
+                                    after: expr.span.shrink_to_hi(),
+                                },
+                            }))
+                        } else {
+                            return None;
+                        }
                     } else {
                         self.sess.emit_err(StructLiteralBodyWithoutPath {
                             span: expr.span,

compiler/rustc_span/src/source_map.rs

@@ -744,6 +744,21 @@ impl SourceMap {
         })
     }
 
+    /// Extends the given `Span` to previous character while the previous character matches the predicate
+    pub fn span_extend_prev_while(
+        &self,
+        span: Span,
+        f: impl Fn(char) -> bool,
+    ) -> Result<Span, SpanSnippetError> {
+        self.span_to_source(span, |s, start, _end| {
+            let n = s[..start]
+                .char_indices()
+                .rfind(|&(_, c)| !f(c))
+                .map_or(start, |(i, _)| start - i - 1);
+            Ok(span.with_lo(span.lo() - BytePos(n as u32)))
+        })
+    }
+
     /// Extends the given `Span` to just before the next occurrence of `c`.
     pub fn span_extend_to_next_char(&self, sp: Span, c: char, accept_newlines: bool) -> Span {
         if let Ok(next_source) = self.span_to_next_source(sp) {

library/std/src/f32.rs

@@ -528,7 +528,7 @@ impl f32 {
 
     /// The positive difference of two numbers.
     ///
-    /// * If `self <= other`: `0:0`
+    /// * If `self <= other`: `0.0`
     /// * Else: `self - other`
     ///
     /// # Examples

library/std/src/f64.rs

@@ -530,7 +530,7 @@ impl f64 {
 
     /// The positive difference of two numbers.
     ///
-    /// * If `self <= other`: `0:0`
+    /// * If `self <= other`: `0.0`
     /// * Else: `self - other`
     ///
     /// # Examples

library/std/src/sys/windows/c.rs

@@ -19,6 +19,7 @@ pub use windows_sys::*;
 pub type DWORD = c_ulong;
 pub type NonZeroDWORD = NonZero_c_ulong;
 pub type LARGE_INTEGER = c_longlong;
+#[cfg_attr(target_vendor = "uwp", allow(unused))]
 pub type LONG = c_long;
 pub type UINT = c_uint;
 pub type WCHAR = u16;
@@ -267,6 +268,8 @@ pub unsafe fn getaddrinfo(
     windows_sys::getaddrinfo(node.cast::<u8>(), service.cast::<u8>(), hints, res)
 }
 
+cfg_if::cfg_if! {
+if #[cfg(not(target_vendor = "uwp"))] {
 pub unsafe fn NtReadFile(
     filehandle: BorrowedHandle<'_>,
     event: HANDLE,
@@ -313,6 +316,8 @@ pub unsafe fn NtWriteFile(
         key.map(|k| k as *const u32).unwrap_or(ptr::null()),
     )
 }
+}
+}
 
 // Functions that aren't available on every version of Windows that we support,
 // but we still use them and just provide some form of a fallback implementation.
@@ -376,4 +381,54 @@ compat_fn_with_fallback! {
     ) -> NTSTATUS {
         panic!("keyed events not available")
     }
+
+    // These functions are available on UWP when lazily loaded. They will fail WACK if loaded statically.
+    #[cfg(target_vendor = "uwp")]
+    pub fn NtCreateFile(
+        filehandle: *mut HANDLE,
+        desiredaccess: FILE_ACCESS_RIGHTS,
+        objectattributes: *const OBJECT_ATTRIBUTES,
+        iostatusblock: *mut IO_STATUS_BLOCK,
+        allocationsize: *const i64,
+        fileattributes: FILE_FLAGS_AND_ATTRIBUTES,
+        shareaccess: FILE_SHARE_MODE,
+        createdisposition: NTCREATEFILE_CREATE_DISPOSITION,
+        createoptions: NTCREATEFILE_CREATE_OPTIONS,
+        eabuffer: *const ::core::ffi::c_void,
+        ealength: u32
+    ) -> NTSTATUS {
+        STATUS_NOT_IMPLEMENTED
+    }
+    #[cfg(target_vendor = "uwp")]
+    pub fn NtReadFile(
+        filehandle: BorrowedHandle<'_>,
+        event: HANDLE,
+        apcroutine: PIO_APC_ROUTINE,
+        apccontext: *mut c_void,
+        iostatusblock: &mut IO_STATUS_BLOCK,
+        buffer: *mut crate::mem::MaybeUninit<u8>,
+        length: ULONG,
+        byteoffset: Option<&LARGE_INTEGER>,
+        key: Option<&ULONG>
+    ) -> NTSTATUS {
+        STATUS_NOT_IMPLEMENTED
+    }
+    #[cfg(target_vendor = "uwp")]
+    pub fn NtWriteFile(
+        filehandle: BorrowedHandle<'_>,
+        event: HANDLE,
+        apcroutine: PIO_APC_ROUTINE,
+        apccontext: *mut c_void,
+        iostatusblock: &mut IO_STATUS_BLOCK,
+        buffer: *const u8,
+        length: ULONG,
+        byteoffset: Option<&LARGE_INTEGER>,
+        key: Option<&ULONG>
+    ) -> NTSTATUS {
+        STATUS_NOT_IMPLEMENTED
+    }
+    #[cfg(target_vendor = "uwp")]
+    pub fn RtlNtStatusToDosError(Status: NTSTATUS) -> u32 {
+        Status as u32
+    }
 }

library/std/src/sys/windows/c/windows_sys.lst

@@ -1930,6 +1930,7 @@ Windows.Win32.Foundation.SetLastError
 Windows.Win32.Foundation.STATUS_DELETE_PENDING
 Windows.Win32.Foundation.STATUS_END_OF_FILE
 Windows.Win32.Foundation.STATUS_INVALID_PARAMETER
+Windows.Win32.Foundation.STATUS_NOT_IMPLEMENTED
 Windows.Win32.Foundation.STATUS_PENDING
 Windows.Win32.Foundation.STATUS_SUCCESS
 Windows.Win32.Foundation.TRUE

library/std/src/sys/windows/c/windows_sys.rs

@@ -3888,6 +3888,7 @@ pub type STARTUPINFOW_FLAGS = u32;
 pub const STATUS_DELETE_PENDING: NTSTATUS = -1073741738i32;
 pub const STATUS_END_OF_FILE: NTSTATUS = -1073741807i32;
 pub const STATUS_INVALID_PARAMETER: NTSTATUS = -1073741811i32;
+pub const STATUS_NOT_IMPLEMENTED: NTSTATUS = -1073741822i32;
 pub const STATUS_PENDING: NTSTATUS = 259i32;
 pub const STATUS_SUCCESS: NTSTATUS = 0i32;
 pub const STD_ERROR_HANDLE: STD_HANDLE = 4294967284u32;

library/std/src/sys/windows/rand.rs

@@ -1,5 +1,3 @@
-use crate::ffi::c_void;
-use crate::io;
 use crate::mem;
 use crate::ptr;
 use crate::sys::c;
@@ -25,6 +23,9 @@ pub fn hashmap_random_keys() -> (u64, u64) {
 #[cfg(not(target_vendor = "uwp"))]
 #[inline(never)]
 fn fallback_rng() -> (u64, u64) {
+    use crate::ffi::c_void;
+    use crate::io;
+
     let mut v = (0, 0);
     let ret = unsafe {
         c::RtlGenRandom(&mut v as *mut _ as *mut c_void, mem::size_of_val(&v) as c::ULONG)

src/bootstrap/compile.rs

@@ -1488,6 +1488,10 @@ impl Step for Assemble {
             // Ensure that `libLLVM.so` ends up in the newly created target directory,
             // so that tools using `rustc_private` can use it.
             dist::maybe_install_llvm_target(builder, target_compiler.host, &sysroot);
+            // Lower stages use `ci-rustc-sysroot`, not stageN
+            if target_compiler.stage == builder.top_stage {
+                builder.info(&format!("Creating a sysroot for stage{stage} compiler (use `rustup toolchain link 'name' build/host/stage{stage}`)", stage=target_compiler.stage));
+            }
             return target_compiler;
         }
 
@@ -1525,11 +1529,18 @@ impl Step for Assemble {
 
         let stage = target_compiler.stage;
         let host = target_compiler.host;
-        let msg = if build_compiler.host == host {
-            format!("Assembling stage{} compiler", stage)
+        let (host_info, dir_name) = if build_compiler.host == host {
+            ("".into(), "host".into())
         } else {
-            format!("Assembling stage{} compiler ({})", stage, host)
+            (format!(" ({host})"), host.to_string())
         };
+        // NOTE: "Creating a sysroot" is somewhat inconsistent with our internal terminology, since
+        // sysroots can temporarily be empty until we put the compiler inside. However,
+        // `ensure(Sysroot)` isn't really something that's user facing, so there shouldn't be any
+        // ambiguity.
+        let msg = format!(
+            "Creating a sysroot for stage{stage} compiler{host_info} (use `rustup toolchain link 'name' build/{dir_name}/stage{stage}`)"
+        );
         builder.info(&msg);
 
         // Link in all dylibs to the libdir

tests/rustdoc-gui/search-reexport.goml

@@ -17,7 +17,7 @@ assert-attribute: (
 assert-text: ("//a[@class='result-import']", "test_docs::TheStdReexport")
 click: "//a[@class='result-import']"
 // We check that it has the background modified thanks to the focus.
-wait-for-css: ("//*[@id='reexport.TheStdReexport']", {"background-color": "rgb(73, 74, 61)"})
+wait-for-css: ("//*[@id='reexport.TheStdReexport']", {"background-color": "#494a3d"})
 
 // We now check that the alias is working as well on the reexport.
 // To be SURE that the search will be run.
@@ -30,4 +30,4 @@ assert-text: (
 )
 // Same thing again, we click on it to ensure the background is once again set as expected.
 click: "//a[@class='result-import']"
-wait-for-css: ("//*[@id='reexport.TheStdReexport']", {"background-color": "rgb(73, 74, 61)"})
+wait-for-css: ("//*[@id='reexport.TheStdReexport']", {"background-color": "#494a3d"})

tests/ui/associated-inherent-types/issue-111404-0.rs

@@ -0,0 +1,14 @@
+// check-pass
+
+#![feature(inherent_associated_types)]
+#![allow(incomplete_features)]
+
+struct Foo<T>(T);
+
+impl<'a> Foo<fn(&'a ())> {
+    type Assoc = &'a ();
+}
+
+fn bar(_: for<'a> fn(Foo<fn(Foo<fn(&'a ())>::Assoc)>::Assoc)) {}
+
+fn main() {}

tests/ui/associated-inherent-types/issue-111404-1.rs

@@ -0,0 +1,13 @@
+#![feature(inherent_associated_types)]
+#![allow(incomplete_features)]
+
+struct Foo<T>(T);
+
+impl<'a> Foo<fn(&'a ())> {
+    type Assoc = &'a ();
+}
+
+fn bar(_: fn(Foo<for<'b> fn(Foo<fn(&'b ())>::Assoc)>::Assoc)) {}
+//~^ ERROR higher-ranked subtype error
+
+fn main() {}