Rollup of 4 pull requests

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -283,7 +283,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
     /// from at least one local module, and returns `true`. If the crate defining `def_id` is
     /// declared with an `extern crate`, the path is guaranteed to use the `extern crate`.
     fn try_print_visible_def_path(&mut self, def_id: DefId) -> Result<bool, PrintError> {
-        if NO_VISIBLE_PATH.with(|flag| flag.get()) {
+        if with_no_visible_paths() {
             return Ok(false);
         }
 
@@ -367,16 +367,16 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
 
     /// Try to see if this path can be trimmed to a unique symbol name.
     fn try_print_trimmed_def_path(&mut self, def_id: DefId) -> Result<bool, PrintError> {
-        if FORCE_TRIMMED_PATH.with(|flag| flag.get()) {
+        if with_forced_trimmed_paths() {
             let trimmed = self.force_print_trimmed_def_path(def_id)?;
             if trimmed {
                 return Ok(true);
             }
         }
         if !self.tcx().sess.opts.unstable_opts.trim_diagnostic_paths
             || matches!(self.tcx().sess.opts.trimmed_def_paths, TrimmedDefPaths::Never)
-            || NO_TRIMMED_PATH.with(|flag| flag.get())
-            || SHOULD_PREFIX_WITH_CRATE.with(|flag| flag.get())
+            || with_no_trimmed_paths()
+            || with_crate_prefix()
         {
             return Ok(false);
         }
@@ -861,7 +861,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
                             p!("@", print_def_path(did.to_def_id(), args));
                         } else {
                             let span = self.tcx().def_span(did);
-                            let preference = if FORCE_TRIMMED_PATH.with(|flag| flag.get()) {
+                            let preference = if with_forced_trimmed_paths() {
                                 FileNameDisplayPreference::Short
                             } else {
                                 FileNameDisplayPreference::Remapped
@@ -1102,7 +1102,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
             write!(self, "Sized")?;
         }
 
-        if !FORCE_TRIMMED_PATH.with(|flag| flag.get()) {
+        if !with_forced_trimmed_paths() {
             for re in lifetimes {
                 write!(self, " + ")?;
                 self.print_region(re)?;
@@ -1886,7 +1886,7 @@ impl<'tcx> Printer<'tcx> for FmtPrinter<'_, 'tcx> {
             // available, and filename/line-number is mostly uninteresting.
             let use_types = !def_id.is_local() || {
                 // Otherwise, use filename/line-number if forced.
-                let force_no_types = FORCE_IMPL_FILENAME_LINE.with(|f| f.get());
+                let force_no_types = with_forced_impl_filename_line();
                 !force_no_types
             };
 
@@ -1951,7 +1951,7 @@ impl<'tcx> Printer<'tcx> for FmtPrinter<'_, 'tcx> {
         if cnum == LOCAL_CRATE {
             if self.tcx.sess.at_least_rust_2018() {
                 // We add the `crate::` keyword on Rust 2018, only when desired.
-                if SHOULD_PREFIX_WITH_CRATE.with(|flag| flag.get()) {
+                if with_crate_prefix() {
                     write!(self, "{}", kw::Crate)?;
                     self.empty_path = false;
                 }
@@ -2154,7 +2154,7 @@ impl<'tcx> PrettyPrinter<'tcx> for FmtPrinter<'_, 'tcx> {
             return true;
         }
 
-        if FORCE_TRIMMED_PATH.with(|flag| flag.get()) {
+        if with_forced_trimmed_paths() {
             return false;
         }
 
@@ -2437,7 +2437,7 @@ impl<'tcx> FmtPrinter<'_, 'tcx> {
         } else {
             let tcx = self.tcx;
 
-            let trim_path = FORCE_TRIMMED_PATH.with(|flag| flag.get());
+            let trim_path = with_forced_trimmed_paths();
             // Closure used in `RegionFolder` to create names for anonymous late-bound
             // regions. We use two `DebruijnIndex`es (one for the currently folded
             // late-bound region and the other for the binder level) to determine

compiler/rustc_parse/messages.ftl

@@ -721,6 +721,9 @@ parse_sugg_wrap_pattern_in_parens = wrap the pattern in parentheses
 parse_switch_mut_let_order =
     switch the order of `mut` and `let`
 
+parse_switch_ref_box_order = switch the order of `ref` and `box`
+    .suggestion = swap them
+
 parse_ternary_operator = Rust has no ternary operator
     .help = use an `if-else` expression instead
 

compiler/rustc_parse/src/errors.rs

@@ -137,6 +137,14 @@ pub(crate) enum InvalidVariableDeclarationSub {
     UseLetNotVar(#[primary_span] Span),
 }
 
+#[derive(Diagnostic)]
+#[diag(parse_switch_ref_box_order)]
+pub(crate) struct SwitchRefBoxOrder {
+    #[primary_span]
+    #[suggestion(applicability = "machine-applicable", code = "box ref")]
+    pub span: Span,
+}
+
 #[derive(Diagnostic)]
 #[diag(parse_invalid_comparison_operator)]
 pub(crate) struct InvalidComparisonOperator {

compiler/rustc_parse/src/parser/pat.rs

@@ -5,8 +5,8 @@ use crate::errors::{
     ExpectedCommaAfterPatternField, GenericArgsInPatRequireTurbofishSyntax,
     InclusiveRangeExtraEquals, InclusiveRangeMatchArrow, InclusiveRangeNoEnd, InvalidMutInPattern,
     PatternOnWrongSideOfAt, RefMutOrderIncorrect, RemoveLet, RepeatedMutInPattern,
-    TopLevelOrPatternNotAllowed, TopLevelOrPatternNotAllowedSugg, TrailingVertNotAllowed,
-    UnexpectedLifetimeInPattern, UnexpectedVertVertBeforeFunctionParam,
+    SwitchRefBoxOrder, TopLevelOrPatternNotAllowed, TopLevelOrPatternNotAllowedSugg,
+    TrailingVertNotAllowed, UnexpectedLifetimeInPattern, UnexpectedVertVertBeforeFunctionParam,
     UnexpectedVertVertInPattern,
 };
 use crate::{maybe_recover_from_interpolated_ty_qpath, maybe_whole};
@@ -374,6 +374,12 @@ impl<'a> Parser<'a> {
         } else if self.eat_keyword(kw::Mut) {
             self.parse_pat_ident_mut(syntax_loc)?
         } else if self.eat_keyword(kw::Ref) {
+            if self.check_keyword(kw::Box) {
+                // Suggest `box ref` and quit parsing pattern to prevent series of
+                // misguided diagnostics from later stages of the compiler.
+                let span = self.prev_token.span.to(self.token.span);
+                return Err(self.sess.create_err(SwitchRefBoxOrder { span }));
+            }
             // Parse ref ident @ pat / ref mut ident @ pat
             let mutbl = self.parse_mutability();
             self.parse_pat_ident(BindingAnnotation(ByRef::Yes, mutbl), syntax_loc)?

compiler/rustc_target/src/spec/targets/aarch64_unknown_none.rs

@@ -14,6 +14,11 @@ pub fn target() -> Target {
     let opts = TargetOptions {
         linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
         linker: Some("rust-lld".into()),
+        // Enable the Cortex-A53 errata 843419 mitigation by default
+        pre_link_args: TargetOptions::link_args(
+            LinkerFlavor::Gnu(Cc::No, Lld::No),
+            &["--fix-cortex-a53-843419"],
+        ),
         features: "+v8a,+strict-align,+neon,+fp-armv8".into(),
         supported_sanitizers: SanitizerSet::KCFI | SanitizerSet::KERNELADDRESS,
         relocation_model: RelocModel::Static,