Auto merge of rust-lang#89549 - Manishearth:rollup-mhkyc16, r=Manishe…

…arth

Rollup of 12 pull requests

Successful merges:

 - rust-lang#87631 (os current_exe using same approach as linux to get always the full ab…)
 - rust-lang#88234 (rustdoc-json: Don't ignore impls for primitive types)
 - rust-lang#88651 (Use the 64b inner:monotonize() implementation not the 128b one for aarch64)
 - rust-lang#88816 (Rustdoc migrate to table so the gui can handle >2k constants)
 - rust-lang#89244 (refactor: VecDeques PairSlices fields to private)
 - rust-lang#89364 (rustdoc-json: Encode json files with UTF-8)
 - rust-lang#89423 (Fix ICE caused by non_exaustive_omitted_patterns struct lint)
 - rust-lang#89426 (bootstrap: add config option for nix patching)
 - rust-lang#89462 (haiku thread affinity build fix)
 - rust-lang#89482 (Follow the diagnostic output style guide)
 - rust-lang#89504 (Don't suggest replacing region with 'static in NLL)
 - rust-lang#89535 (fix busted JavaScript in error index generator)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

compiler/rustc_borrowck/src/diagnostics/outlives_suggestion.rs

@@ -171,9 +171,7 @@ impl OutlivesSuggestionBuilder {
         let outlived_fr_name = self.region_vid_to_name(mbcx, errci.outlived_fr);
 
         if let (Some(fr_name), Some(outlived_fr_name)) = (fr_name, outlived_fr_name) {
-            if let RegionNameSource::Static = outlived_fr_name.source {
-                diag.help(&format!("consider replacing `{}` with `'static`", fr_name));
-            } else {
+            if !matches!(outlived_fr_name.source, RegionNameSource::Static) {
                 diag.help(&format!(
                     "consider adding the following bound: `{}: {}`",
                     fr_name, outlived_fr_name

compiler/rustc_const_eval/src/transform/check_consts/ops.rs

@@ -102,7 +102,7 @@ impl NonConstOp for FnCallUnstable {
         );
 
         if ccx.is_const_stable_const_fn() {
-            err.help("Const-stable functions can only call other const-stable functions");
+            err.help("const-stable functions can only call other const-stable functions");
         } else if ccx.tcx.sess.is_nightly_build() {
             if let Some(feature) = feature {
                 err.help(&format!(

compiler/rustc_typeck/src/check/check.rs

@@ -58,7 +58,7 @@ pub(super) fn check_abi(tcx: TyCtxt<'_>, hir_id: hir::HirId, span: Span, abi: Ab
             tcx.sess,
             span,
             E0781,
-            "the `\"C-cmse-nonsecure-call\"` ABI is only allowed on function pointers."
+            "the `\"C-cmse-nonsecure-call\"` ABI is only allowed on function pointers"
         )
         .emit()
     }

compiler/rustc_typeck/src/check/pat.rs

@@ -181,8 +181,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 self.check_pat_tuple_struct(pat, qpath, subpats, ddpos, expected, def_bm, ti)
             }
             PatKind::Path(_) => self.check_pat_path(pat, path_res.unwrap(), expected, ti),
-            PatKind::Struct(ref qpath, fields, etc) => {
-                self.check_pat_struct(pat, qpath, fields, etc, expected, def_bm, ti)
+            PatKind::Struct(ref qpath, fields, has_rest_pat) => {
+                self.check_pat_struct(pat, qpath, fields, has_rest_pat, expected, def_bm, ti)
             }
             PatKind::Or(pats) => {
                 let parent_pat = Some(pat);
@@ -712,7 +712,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         pat: &'tcx Pat<'tcx>,
         qpath: &hir::QPath<'_>,
         fields: &'tcx [hir::PatField<'tcx>],
-        etc: bool,
+        has_rest_pat: bool,
         expected: Ty<'tcx>,
         def_bm: BindingMode,
         ti: TopInfo<'tcx>,
@@ -734,7 +734,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         self.demand_eqtype_pat(pat.span, expected, pat_ty, ti);
 
         // Type-check subpatterns.
-        if self.check_struct_pat_fields(pat_ty, pat, variant, fields, etc, def_bm, ti) {
+        if self.check_struct_pat_fields(pat_ty, &pat, variant, fields, has_rest_pat, def_bm, ti) {
             pat_ty
         } else {
             self.tcx.ty_error()
@@ -1216,7 +1216,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         pat: &'tcx Pat<'tcx>,
         variant: &'tcx ty::VariantDef,
         fields: &'tcx [hir::PatField<'tcx>],
-        etc: bool,
+        has_rest_pat: bool,
         def_bm: BindingMode,
         ti: TopInfo<'tcx>,
     ) -> bool {
@@ -1290,7 +1290,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
         // Require `..` if struct has non_exhaustive attribute.
         let non_exhaustive = variant.is_field_list_non_exhaustive() && !adt.did.is_local();
-        if non_exhaustive && !etc {
+        if non_exhaustive && !has_rest_pat {
             self.error_foreign_non_exhaustive_spat(pat, adt.variant_descr(), fields.is_empty());
         }
 
@@ -1302,7 +1302,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     .struct_span_err(pat.span, "union patterns should have exactly one field")
                     .emit();
             }
-            if etc {
+            if has_rest_pat {
                 tcx.sess.struct_span_err(pat.span, "`..` cannot be used in union patterns").emit();
             }
         } else if !unmentioned_fields.is_empty() {
@@ -1313,9 +1313,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     field.vis.is_accessible_from(tcx.parent_module(pat.hir_id).to_def_id(), tcx)
                 })
                 .collect();
-            if non_exhaustive {
-                self.non_exhaustive_reachable_pattern(pat, &accessible_unmentioned_fields, adt_ty)
-            } else if !etc {
+
+            if !has_rest_pat {
                 if accessible_unmentioned_fields.is_empty() {
                     unmentioned_err = Some(self.error_no_accessible_fields(pat, fields));
                 } else {
@@ -1326,6 +1325,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         fields,
                     ));
                 }
+            } else if non_exhaustive && !accessible_unmentioned_fields.is_empty() {
+                self.lint_non_exhaustive_omitted_patterns(
+                    pat,
+                    &accessible_unmentioned_fields,
+                    adt_ty,
+                )
             }
         }
         match (inexistent_fields_err, unmentioned_err) {
@@ -1653,7 +1658,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// is not exhaustive enough.
     ///
     /// Nb: the partner lint for enums lives in `compiler/rustc_mir_build/src/thir/pattern/usefulness.rs`.
-    fn non_exhaustive_reachable_pattern(
+    fn lint_non_exhaustive_omitted_patterns(
         &self,
         pat: &Pat<'_>,
         unmentioned_fields: &[(&ty::FieldDef, Ident)],

config.toml.example

@@ -313,6 +313,12 @@ changelog-seen = 2
 # this setting's very existence, are all subject to change.)
 #print-step-rusage = false
 
+# Always patch binaries for usage with Nix toolchains. If `true` then binaries
+# will be patched unconditionally. If `false` or unset, binaries will be patched
+# only if the current distribution is NixOS. This option is useful when using
+# a Nix toolchain on non-NixOS distributions.
+#patch-binaries-for-nix = false
+
 # =============================================================================
 # General install configuration options
 # =============================================================================

library/alloc/src/collections/vec_deque/pair_slices.rs

@@ -20,10 +20,10 @@ use super::VecDeque;
 ///
 /// and the uneven remainder of either A or B is skipped.
 pub struct PairSlices<'a, 'b, T> {
-    pub(crate) a0: &'a mut [T],
-    pub(crate) a1: &'a mut [T],
-    pub(crate) b0: &'b [T],
-    pub(crate) b1: &'b [T],
+    a0: &'a mut [T],
+    a1: &'a mut [T],
+    b0: &'b [T],
+    b1: &'b [T],
 }
 
 impl<'a, 'b, T> PairSlices<'a, 'b, T> {

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

@@ -380,20 +380,24 @@ pub fn current_exe() -> io::Result<PathBuf> {
 
 #[cfg(any(target_os = "solaris", target_os = "illumos"))]
 pub fn current_exe() -> io::Result<PathBuf> {
-    extern "C" {
-        fn getexecname() -> *const c_char;
-    }
-    unsafe {
-        let path = getexecname();
-        if path.is_null() {
-            Err(io::Error::last_os_error())
-        } else {
-            let filename = CStr::from_ptr(path).to_bytes();
-            let path = PathBuf::from(<OsStr as OsStrExt>::from_bytes(filename));
+    if let Ok(path) = crate::fs::read_link("/proc/self/path/a.out") {
+        Ok(path)
+    } else {
+        extern "C" {
+            fn getexecname() -> *const c_char;
+        }
+        unsafe {
+            let path = getexecname();
+            if path.is_null() {
+                Err(io::Error::last_os_error())
+            } else {
+                let filename = CStr::from_ptr(path).to_bytes();
+                let path = PathBuf::from(<OsStr as OsStrExt>::from_bytes(filename));
 
-            // Prepend a current working directory to the path if
-            // it doesn't contain an absolute pathname.
-            if filename[0] == b'/' { Ok(path) } else { getcwd().map(|cwd| cwd.join(path)) }
+                // Prepend a current working directory to the path if
+                // it doesn't contain an absolute pathname.
+                if filename[0] == b'/' { Ok(path) } else { getcwd().map(|cwd| cwd.join(path)) }
+            }
         }
     }
 }

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

@@ -339,14 +339,18 @@ pub fn available_concurrency() -> io::Result<NonZeroUsize> {
 
             Ok(unsafe { NonZeroUsize::new_unchecked(cpus as usize) })
         } else if #[cfg(target_os = "haiku")] {
-            let mut sinfo: libc::system_info = crate::mem::zeroed();
-            let res = libc::get_system_info(&mut sinfo);
+            // system_info cpu_count field gets the static data set at boot time with `smp_set_num_cpus`
+            // `get_system_info` calls then `smp_get_num_cpus`
+            unsafe {
+                let mut sinfo: libc::system_info = crate::mem::zeroed();
+                let res = libc::get_system_info(&mut sinfo);
 
-            if res != libc::B_OK {
-                return Err(io::Error::last_os_error());
-            }
+                if res != libc::B_OK {
+                    return Err(io::Error::new_const(io::ErrorKind::NotFound, &"The number of hardware threads is not known for the target platform"));
+                }
 
-            Ok(unsafe { NonZeroUsize::new_unchecked(sinfo.cpu_count as usize) })
+                Ok(NonZeroUsize::new_unchecked(sinfo.cpu_count as usize))
+            }
         } else {
             // FIXME: implement on vxWorks, Redox, l4re
             Err(io::Error::new_const(io::ErrorKind::Unsupported, &"Getting the number of hardware threads is not supported on the target platform"))

library/std/src/time/monotonic.rs

@@ -5,7 +5,7 @@ pub(super) fn monotonize(raw: time::Instant) -> time::Instant {
     inner::monotonize(raw)
 }
 
-#[cfg(all(target_has_atomic = "64", not(target_has_atomic = "128")))]
+#[cfg(any(all(target_has_atomic = "64", not(target_has_atomic = "128")), target_arch = "aarch64"))]
 pub mod inner {
     use crate::sync::atomic::AtomicU64;
     use crate::sync::atomic::Ordering::*;
@@ -71,7 +71,7 @@ pub mod inner {
     }
 }
 
-#[cfg(target_has_atomic = "128")]
+#[cfg(all(target_has_atomic = "128", not(target_arch = "aarch64")))]
 pub mod inner {
     use crate::sync::atomic::AtomicU128;
     use crate::sync::atomic::Ordering::*;

src/bootstrap/bootstrap.py

@@ -594,19 +594,23 @@ def fix_bin_or_dylib(self, fname):
         if ostype != "Linux":
             return
 
-        # Use `/etc/os-release` instead of `/etc/NIXOS`.
-        # The latter one does not exist on NixOS when using tmpfs as root.
-        try:
-            with open("/etc/os-release", "r") as f:
-                if not any(line.strip() == "ID=nixos" for line in f):
-                    return
-        except FileNotFoundError:
-            return
-        if os.path.exists("/lib"):
-            return
+        # If the user has asked binaries to be patched for Nix, then
+        # don't check for NixOS or `/lib`, just continue to the patching.
+        if self.get_toml('patch-binaries-for-nix', 'build') != 'true':
+            # Use `/etc/os-release` instead of `/etc/NIXOS`.
+            # The latter one does not exist on NixOS when using tmpfs as root.
+            try:
+                with open("/etc/os-release", "r") as f:
+                    if not any(line.strip() == "ID=nixos" for line in f):
+                        return
+            except FileNotFoundError:
+                return
+            if os.path.exists("/lib"):
+                return
 
-        # At this point we're pretty sure the user is running NixOS
-        nix_os_msg = "info: you seem to be running NixOS. Attempting to patch"
+        # At this point we're pretty sure the user is running NixOS or
+        # using Nix
+        nix_os_msg = "info: you seem to be using Nix. Attempting to patch"
         print(nix_os_msg, fname)
 
         # Only build `.nix-deps` once.

src/bootstrap/config.rs

@@ -397,6 +397,7 @@ struct Build {
     install_stage: Option<u32>,
     dist_stage: Option<u32>,
     bench_stage: Option<u32>,
+    patch_binaries_for_nix: Option<bool>,
 }
 
 /// TOML representation of various global install decisions.

src/etc/check_missing_items.py

@@ -9,7 +9,7 @@
 import sys
 import json
 
-crate = json.load(open(sys.argv[1]))
+crate = json.load(open(sys.argv[1], encoding="utf-8"))
 
 
 def get_local_item(item_id):

src/librustdoc/html/render/print_item.rs

@@ -34,6 +34,8 @@ use crate::html::markdown::MarkdownSummaryLine;
 
 const ITEM_TABLE_OPEN: &'static str = "<div class=\"item-table\">";
 const ITEM_TABLE_CLOSE: &'static str = "</div>";
+const ITEM_TABLE_ROW_OPEN: &'static str = "<div class=\"item-row\">";
+const ITEM_TABLE_ROW_CLOSE: &'static str = "</div>";
 
 pub(super) fn print_item(cx: &Context<'_>, item: &clean::Item, buf: &mut Buffer, page: &Page<'_>) {
     debug_assert!(!item.is_stripped());
@@ -256,9 +258,6 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
 
     debug!("{:?}", indices);
     let mut curty = None;
-    // See: https://github.com/rust-lang/rust/issues/88545
-    let item_table_block_size = 900usize;
-    let mut item_table_nth_element = 0usize;
 
     for &idx in &indices {
         let myitem = &items[idx];
@@ -285,13 +284,13 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
                 id = cx.derive_id(short.to_owned()),
                 name = name
             );
-            item_table_nth_element = 0;
         }
 
         match *myitem.kind {
             clean::ExternCrateItem { ref src } => {
                 use crate::html::format::anchor;
 
+                w.write_str(ITEM_TABLE_ROW_OPEN);
                 match *src {
                     Some(ref src) => write!(
                         w,
@@ -312,6 +311,7 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
                     ),
                 }
                 w.write_str("</code></div>");
+                w.write_str(ITEM_TABLE_ROW_CLOSE);
             }
 
             clean::ImportItem(ref import) => {
@@ -336,6 +336,7 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
 
                 let add = if stab.is_some() { " " } else { "" };
 
+                w.write_str(ITEM_TABLE_ROW_OPEN);
                 write!(
                     w,
                     "<div class=\"item-left {stab}{add}import-item\">\
@@ -348,6 +349,7 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
                     imp = import.print(cx),
                     stab_tags = stab_tags.unwrap_or_default(),
                 );
+                w.write_str(ITEM_TABLE_ROW_CLOSE);
             }
 
             _ => {
@@ -368,6 +370,7 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
                 let add = if stab.is_some() { " " } else { "" };
 
                 let doc_value = myitem.doc_value().unwrap_or_default();
+                w.write_str(ITEM_TABLE_ROW_OPEN);
                 write!(
                     w,
                     "<div class=\"item-left {stab}{add}module-item\">\
@@ -390,15 +393,9 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl
                         .collect::<Vec<_>>()
                         .join(" "),
                 );
+                w.write_str(ITEM_TABLE_ROW_CLOSE);
             }
         }
-
-        item_table_nth_element += 1;
-        if item_table_nth_element > item_table_block_size {
-            w.write_str(ITEM_TABLE_CLOSE);
-            w.write_str(ITEM_TABLE_OPEN);
-            item_table_nth_element = 0;
-        }
     }
 
     if curty.is_some() {