Remove noisy suggestion of hash_map #72642

Update src/librustc_resolve/diagnostics.rs

Co-authored-by: David Wood <Q0KPU0H1YOEPHRY1R2SN5B5RL@david.davidtw.co>

Minor refactoring #72642

Fixed failing test-cases

remove trivial `mk_predicate`s

Make `SourceMap` available for early debug-printing of `Span`s

Normally, we debug-print `Spans` using the `SourceMap` retrieved from
the global `TyCtxt`. However, we fall back to printing out the `Span`'s
raw fields (instead of a file and line number) when we try to print a
`Span` before a `TyCtxt` is available. This makes debugging early phases
of the compile, such as parsing, much more difficult.

This commit stores a `SourceMap` in `rustc_span::GlOBALS` as a fallback.
When a `TyCtxt` is not available, we try to retrieve one from `GLOBALS`
- only if this is not available do we fall back to the raw field output.

I'm not sure how to write a test for this - however, this can be
verified locally by setting `RUSTC_LOG="rustc_parse=debug"`, and
verifying that the output contains filenames and line numbers.

Add test for #72554.

rustc_target: Remove `pre_link_args_crt`

Improve E0433, so that it suggests missing imports

Fix a typo in `late.rs`

Co-authored-by: Esteban Kuber <estebank@users.noreply.github.com>

fix `AdtDef` docs

Add Camelid

Email from @camelid:

> HI there,
>
> I’m a new contributor and I just looked at Rust Thanks and noticed that my contributions are listed under two different capitalizations of my name: “Camelid" and “camelid". Could you make them both “Camelid"?
>
> Thanks!
>
> Camelid

save_analysis: work on HIR tree instead of AST

Update `rls` submodule

remove outdated fixme

Hexagon libstd: fix typo for c_ulonglong

Add more assert to Vec with_capacity docs

Show assertion on len too to show them how adding new items will affect both the
length and capacity, before and after.

Add Kyle Strand to mailmap

Fix missing word in RELEASES.md

Update cargo

Enable lld for Cargo tests on Windows.

Fixed failing test-cases #72642

Author: Ayush Kumar Mishra

.github/workflows/ci.yml

@@ -442,7 +442,7 @@ jobs:
           - name: x86_64-msvc-cargo
             env:
               SCRIPT: python x.py test src/tools/cargotest src/tools/cargo
-              RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc"
+              RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --enable-lld"
               VCVARS_BAT: vcvars64.bat
               NO_DEBUG_ASSERTIONS: 1
               NO_LLVM_ASSERTIONS: 1

.mailmap

@@ -44,6 +44,7 @@ Brian Anderson <banderson@mozilla.com> <andersrb@gmail.com>
 Brian Anderson <banderson@mozilla.com> <banderson@mozilla.org>
 Brian Dawn <brian.t.dawn@gmail.com>
 Brian Leibig <brian@brianleibig.com> Brian Leibig <brian.leibig@gmail.com>
+Camelid <camelidcamel@gmail.com> <37223377+camelid@users.noreply.github.com>
 Carl-Anton Ingmarsson <mail@carlanton.se> <ca.ingmarsson@gmail.com>
 Carol (Nichols || Goulding) <carol.nichols@gmail.com> <193874+carols10cents@users.noreply.github.com>
 Carol (Nichols || Goulding) <carol.nichols@gmail.com> <carol.nichols@gmail.com>
@@ -152,6 +153,10 @@ Kang Seonghoon <kang.seonghoon@mearie.org> <public+git@mearie.org>
 Keegan McAllister <mcallister.keegan@gmail.com> <kmcallister@mozilla.com>
 Kevin Butler <haqkrs@gmail.com>
 Kyeongwoon Lee <kyeongwoon.lee@samsung.com>
+Kyle J Strand <batmanaod@gmail.com> <BatmanAoD@users.noreply.github.com>
+Kyle J Strand <batmanaod@gmail.com> <kyle.j.strand@gmail.com>
+Kyle J Strand <batmanaod@gmail.com> <kyle.strand@pieinsurance.com>
+Kyle J Strand <batmanaod@gmail.com> <kyle.strand@rms.com>
 Laurențiu Nicola <lnicola@dend.ro>
 Lee Jeffery <leejeffery@gmail.com> Lee Jeffery <lee@leejeffery.co.uk>
 Lee Wondong <wdlee91@gmail.com>

RELEASES.md

@@ -100,7 +100,7 @@ Compatibility Notes
 - [Removed the `-C no_integrated_as` flag from rustc.][70345]
 - [The `file_name` property in JSON output of macro errors now points the actual
   source file rather than the previous format of `<NAME macros>`.][70969]
-  **Note:** this may not point a file that actually exists on the user's system.
+  **Note:** this may not point to a file that actually exists on the user's system.
 - [The minimum required external LLVM version has been bumped to LLVM 8.][71147]
 - [`mem::{zeroed, uninitialised}` will now panic when used with types that do
   not allow zero initialization such as `NonZeroU8`.][66059] This was

src/ci/azure-pipelines/auto.yml

@@ -148,7 +148,7 @@ jobs:
         INITIAL_RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc
       x86_64-msvc-cargo:
         SCRIPT: python x.py test src/tools/cargotest src/tools/cargo
-        INITIAL_RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc
+        INITIAL_RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-lld
         VCVARS_BAT: vcvars64.bat
         # FIXME(#59637)
         NO_DEBUG_ASSERTIONS: 1

src/ci/github-actions/ci.yml

@@ -505,7 +505,7 @@ jobs:
           - name: x86_64-msvc-cargo
             env:
               SCRIPT: python x.py test src/tools/cargotest src/tools/cargo
-              RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc
+              RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-lld
               VCVARS_BAT: vcvars64.bat
               # FIXME(#59637)
               NO_DEBUG_ASSERTIONS: 1

src/liballoc/vec.rs

@@ -343,15 +343,18 @@ impl<T> Vec<T> {
     ///
     /// // The vector contains no items, even though it has capacity for more
     /// assert_eq!(vec.len(), 0);
+    /// assert_eq!(vec.capacity(), 10);
     ///
     /// // These are all done without reallocating...
     /// for i in 0..10 {
     ///     vec.push(i);
     /// }
+    /// assert_eq!(vec.len(), 10);
     /// assert_eq!(vec.capacity(), 10);
     ///
     /// // ...but this may make the vector reallocate
     /// vec.push(11);
+    /// assert_eq!(vec.len(), 11);
     /// assert!(vec.capacity() >= 11);
     /// ```
     #[inline]

src/librustc_codegen_ssa/back/link.rs

@@ -1253,20 +1253,10 @@ fn add_post_link_objects(
 
 /// Add arbitrary "pre-link" args defined by the target spec or from command line.
 /// FIXME: Determine where exactly these args need to be inserted.
-fn add_pre_link_args(
-    cmd: &mut dyn Linker,
-    sess: &Session,
-    flavor: LinkerFlavor,
-    crate_type: CrateType,
-) {
+fn add_pre_link_args(cmd: &mut dyn Linker, sess: &Session, flavor: LinkerFlavor) {
     if let Some(args) = sess.target.target.options.pre_link_args.get(&flavor) {
         cmd.args(args);
     }
-    if let Some(args) = sess.target.target.options.pre_link_args_crt.get(&flavor) {
-        if sess.crt_static(Some(crate_type)) {
-            cmd.args(args);
-        }
-    }
     cmd.args(&sess.opts.debugging_opts.pre_link_args);
 }
 
@@ -1502,7 +1492,7 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
     let crt_objects_fallback = crt_objects_fallback(sess, crate_type);
 
     // NO-OPT-OUT, OBJECT-FILES-MAYBE, CUSTOMIZATION-POINT
-    add_pre_link_args(cmd, sess, flavor, crate_type);
+    add_pre_link_args(cmd, sess, flavor);
 
     // NO-OPT-OUT
     add_link_script(cmd, sess, tmpdir, crate_type);

src/librustc_codegen_ssa/back/linker.rs

@@ -315,6 +315,21 @@ impl<'a> Linker for GccLinker<'a> {
                 self.build_dylib(out_filename);
             }
         }
+        // VxWorks compiler driver introduced `--static-crt` flag specifically for rustc,
+        // it switches linking for libc and similar system libraries to static without using
+        // any `#[link]` attributes in the `libc` crate, see #72782 for details.
+        // FIXME: Switch to using `#[link]` attributes in the `libc` crate
+        // similarly to other targets.
+        if self.sess.target.target.target_os == "vxworks"
+            && matches!(
+                output_kind,
+                LinkOutputKind::StaticNoPicExe
+                    | LinkOutputKind::StaticPicExe
+                    | LinkOutputKind::StaticDylib
+            )
+        {
+            self.cmd.arg("--static-crt");
+        }
     }
 
     fn link_dylib(&mut self, lib: Symbol) {

src/librustc_driver/lib.rs

@@ -346,20 +346,22 @@ pub fn run_compiler(
 
             queries.global_ctxt()?;
 
+            // Drop AST after creating GlobalCtxt to free memory
+            let _timer = sess.prof.generic_activity("drop_ast");
+            mem::drop(queries.expansion()?.take());
+
             if sess.opts.debugging_opts.no_analysis || sess.opts.debugging_opts.ast_json {
                 return early_exit();
             }
 
             if sess.opts.debugging_opts.save_analysis {
-                let expanded_crate = &queries.expansion()?.peek().0;
                 let crate_name = queries.crate_name()?.peek().clone();
                 queries.global_ctxt()?.peek_mut().enter(|tcx| {
                     let result = tcx.analysis(LOCAL_CRATE);
 
                     sess.time("save_analysis", || {
                         save::process_crate(
                             tcx,
-                            &expanded_crate,
                             &crate_name,
                             &compiler.input(),
                             None,
@@ -371,13 +373,7 @@ pub fn run_compiler(
                     });
 
                     result
-                    // AST will be dropped *after* the `after_analysis` callback
-                    // (needed by the RLS)
                 })?;
-            } else {
-                // Drop AST after creating GlobalCtxt to free memory
-                let _timer = sess.prof.generic_activity("drop_ast");
-                mem::drop(queries.expansion()?.take());
             }
 
             queries.global_ctxt()?.peek_mut().enter(|tcx| tcx.analysis(LOCAL_CRATE))?;
@@ -386,10 +382,6 @@ pub fn run_compiler(
                 return early_exit();
             }
 
-            if sess.opts.debugging_opts.save_analysis {
-                mem::drop(queries.expansion()?.take());
-            }
-
             queries.ongoing_codegen()?;
 
             if sess.opts.debugging_opts.print_type_sizes {

src/librustc_hir_pretty/lib.rs

@@ -203,6 +203,30 @@ pub fn visibility_qualified<S: Into<Cow<'static, str>>>(vis: &hir::Visibility<'_
     })
 }
 
+pub fn generic_params_to_string(generic_params: &[GenericParam<'_>]) -> String {
+    to_string(NO_ANN, |s| s.print_generic_params(generic_params))
+}
+
+pub fn bounds_to_string<'b>(bounds: impl IntoIterator<Item = &'b hir::GenericBound<'b>>) -> String {
+    to_string(NO_ANN, |s| s.print_bounds("", bounds))
+}
+
+pub fn param_to_string(arg: &hir::Param<'_>) -> String {
+    to_string(NO_ANN, |s| s.print_param(arg))
+}
+
+pub fn ty_to_string(ty: &hir::Ty<'_>) -> String {
+    to_string(NO_ANN, |s| s.print_type(ty))
+}
+
+pub fn path_segment_to_string(segment: &hir::PathSegment<'_>) -> String {
+    to_string(NO_ANN, |s| s.print_path_segment(segment))
+}
+
+pub fn path_to_string(segment: &hir::Path<'_>) -> String {
+    to_string(NO_ANN, |s| s.print_path(segment, false))
+}
+
 impl<'a> State<'a> {
     pub fn cbox(&mut self, u: usize) {
         self.s.cbox(u);

src/librustc_interface/interface.rs

@@ -186,17 +186,19 @@ pub fn run_compiler_in_existing_thread_pool<R>(
         override_queries: config.override_queries,
     };
 
-    let r = {
-        let _sess_abort_error = OnDrop(|| {
-            compiler.sess.finish_diagnostics(registry);
-        });
-
-        f(&compiler)
-    };
-
-    let prof = compiler.sess.prof.clone();
-    prof.generic_activity("drop_compiler").run(move || drop(compiler));
-    r
+    rustc_span::with_source_map(compiler.sess.parse_sess.clone_source_map(), move || {
+        let r = {
+            let _sess_abort_error = OnDrop(|| {
+                compiler.sess.finish_diagnostics(registry);
+            });
+
+            f(&compiler)
+        };
+
+        let prof = compiler.sess.prof.clone();
+        prof.generic_activity("drop_compiler").run(move || drop(compiler));
+        r
+    })
 }
 
 pub fn run_compiler<R: Send>(mut config: Config, f: impl FnOnce(&Compiler) -> R + Send) -> R {

src/librustc_middle/ty/mod.rs

@@ -1846,7 +1846,7 @@ pub struct FieldDef {
 
 /// The definition of a user-defined type, e.g., a `struct`, `enum`, or `union`.
 ///
-/// These are all interned (by `intern_adt_def`) into the `adt_defs` table.
+/// These are all interned (by `alloc_adt_def`) into the global arena.
 ///
 /// The initialism *ADT* stands for an [*algebraic data type (ADT)*][adt].
 /// This is slightly wrong because `union`s are not ADTs.

src/librustc_middle/ty/structural_impls.rs

@@ -987,7 +987,8 @@ impl<'tcx> TypeFoldable<'tcx> for ty::Region<'tcx> {
 
 impl<'tcx> TypeFoldable<'tcx> for ty::Predicate<'tcx> {
     fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
-        folder.tcx().mk_predicate(ty::PredicateKind::super_fold_with(self.kind, folder))
+        let new = ty::PredicateKind::super_fold_with(self.kind, folder);
+        if new != *self.kind { folder.tcx().mk_predicate(new) } else { *self }
     }
 
     fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {

src/librustc_resolve/diagnostics.rs

@@ -680,7 +680,9 @@ impl<'a> Resolver<'a> {
                                 Res::Def(DefKind::Ctor(..), did) => this.parent(did),
                                 _ => res.opt_def_id(),
                             };
-                            candidates.push(ImportSuggestion { did, descr: res.descr(), path });
+                            if candidates.iter().all(|v: &ImportSuggestion| v.did != did) {
+                                candidates.push(ImportSuggestion { did, descr: res.descr(), path });
+                            }
                         }
                     }
                 }
@@ -1475,7 +1477,7 @@ crate fn show_candidates(
     // This is `None` if all placement locations are inside expansions
     use_placement_span: Option<Span>,
     candidates: &[ImportSuggestion],
-    better: bool,
+    instead: bool,
     found_use: bool,
 ) {
     if candidates.is_empty() {
@@ -1486,6 +1488,7 @@ crate fn show_candidates(
     // by iterating through a hash map, so make sure they are ordered:
     let mut path_strings: Vec<_> =
         candidates.iter().map(|c| path_names_to_string(&c.path)).collect();
+
     path_strings.sort();
     path_strings.dedup();
 
@@ -1494,8 +1497,9 @@ crate fn show_candidates(
     } else {
         ("one of these", "items")
     };
-    let instead = if better { " instead" } else { "" };
-    let msg = format!("consider importing {} {}{}", determiner, kind, instead);
+
+    let instead = if instead { " instead" } else { "" };
+    let mut msg = format!("consider importing {} {}{}", determiner, kind, instead);
 
     if let Some(span) = use_placement_span {
         for candidate in &mut path_strings {
@@ -1507,12 +1511,13 @@ crate fn show_candidates(
 
         err.span_suggestions(span, &msg, path_strings.into_iter(), Applicability::Unspecified);
     } else {
-        let mut msg = msg;
         msg.push(':');
+
         for candidate in path_strings {
             msg.push('\n');
             msg.push_str(&candidate);
         }
+
         err.note(&msg);
     }
 }