Auto merge of rust-lang#109043 - matthiaskrgr:rollup-genkz0e, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#108726 (tidy: enforce comment blocks to have an even number of backticks)
 - rust-lang#108797 (Allow binary files to go through the `FileLoader`)
 - rust-lang#108841 (Add suggestion to diagnostic when user has array but trait wants slice. (rebased))
 - rust-lang#108984 (bootstrap: document tidy)
 - rust-lang#109013 (Give proper error message when tcx wasn't passed to decoder)
 - rust-lang#109017 (remove duplicated calls to sort_string)
 - rust-lang#109018 (Expand on the allocator comment in `rustc-main`)
 - rust-lang#109028 (Add eslint checks for rustdoc-js tester)
 - rust-lang#109034 (Commit some tests for the new solver + lazy norm)

Failed merges:

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

Author: bors

compiler/rustc/src/main.rs

@@ -24,6 +24,15 @@
 // The two crates we link to here, `std` and `rustc_driver`, are both dynamic
 // libraries. So we must reference jemalloc symbols one way or another, because
 // this file is the only object code in the rustc executable.
+//
+// NOTE: if you are reading this comment because you want to set a custom `global_allocator` for
+// benchmarking, consider using the benchmarks in the `rustc-perf` collector suite instead:
+// https://github.com/rust-lang/rustc-perf/blob/master/collector/README.md#profiling
+//
+// NOTE: if you are reading this comment because you want to replace jemalloc with another allocator
+// to compare their performance, see
+// https://github.com/rust-lang/rust/commit/b90cfc887c31c3e7a9e6d462e2464db1fe506175#diff-43914724af6e464c1da2171e4a9b6c7e607d5bc1203fa95c0ab85be4122605ef
+// for an example of how to do so.
 
 #[unix_sigpipe = "sig_dfl"]
 fn main() {

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -1052,6 +1052,7 @@ impl<'a> MethodDef<'a> {
     ///         ::core::hash::Hash::hash(&{ self.y }, state)
     ///     }
     /// }
+    /// ```
     fn expand_struct_method_body<'b>(
         &self,
         cx: &mut ExtCtxt<'_>,

compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs

@@ -438,6 +438,7 @@ fn build_enum_variant_member_di_node<'ll, 'tcx>(
 ///         DW_TAG_structure_type            (type of variant 1)
 ///         DW_TAG_structure_type            (type of variant 2)
 ///         DW_TAG_structure_type            (type of variant 3)
+/// ```
 struct VariantMemberInfo<'a, 'll> {
     variant_index: VariantIdx,
     variant_name: Cow<'a, str>,

compiler/rustc_error_codes/src/error_codes/E0368.md

@@ -41,7 +41,7 @@ impl Add for Foo {
 
 fn main() {
     let mut x: Foo = Foo(5);
-    x += Foo(7); // error, `+= cannot be applied to the type `Foo`
+    x += Foo(7); // error, `+=` cannot be applied to the type `Foo`
 }
 ```
 

compiler/rustc_error_codes/src/error_codes/E0710.md

@@ -3,14 +3,14 @@ An unknown tool name was found in a scoped lint.
 Erroneous code examples:
 
 ```compile_fail,E0710
-#[allow(clipp::filter_map)] // error!`
+#[allow(clipp::filter_map)] // error!
 fn main() {
     // business logic
 }
 ```
 
 ```compile_fail,E0710
-#[warn(clipp::filter_map)] // error!`
+#[warn(clipp::filter_map)] // error!
 fn main() {
     // business logic
 }

compiler/rustc_hir_typeck/src/closure.rs

@@ -398,7 +398,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     ///
     /// Here:
     /// - E would be `fn(&u32) -> &u32`.
-    /// - S would be `fn(&u32) ->
+    /// - S would be `fn(&u32) -> ?T`
     /// - E' is `&'!0 u32 -> &'!0 u32`
     /// - S' is `&'?0 u32 -> ?T`
     ///

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/static_impl_trait.rs

@@ -104,7 +104,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
         let (mention_influencer, influencer_point) =
             if sup_origin.span().overlaps(param.param_ty_span) {
                 // Account for `async fn` like in `async-await/issues/issue-62097.rs`.
-                // The desugaring of `async `fn`s causes `sup_origin` and `param` to point at the same
+                // The desugaring of `async fn`s causes `sup_origin` and `param` to point at the same
                 // place (but with different `ctxt`, hence `overlaps` instead of `==` above).
                 //
                 // This avoids the following:

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -311,8 +311,11 @@ impl<T: ParameterizedOverTcx> LazyArray<T> {
 impl<'a, 'tcx> DecodeContext<'a, 'tcx> {
     #[inline]
     fn tcx(&self) -> TyCtxt<'tcx> {
-        debug_assert!(self.tcx.is_some(), "missing TyCtxt in DecodeContext");
-        self.tcx.unwrap()
+        let Some(tcx) = self.tcx else {
+            bug!("No TyCtxt found for decoding. \
+                You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`.");
+        };
+        tcx
     }
 
     #[inline]
@@ -454,7 +457,12 @@ impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ast::AttrId {
 impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SyntaxContext {
     fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> SyntaxContext {
         let cdata = decoder.cdata();
-        let sess = decoder.sess.unwrap();
+
+        let Some(sess) = decoder.sess else {
+            bug!("Cannot decode SyntaxContext without Session.\
+                You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`.");
+        };
+
         let cname = cdata.root.name;
         rustc_span::hygiene::decode_syntax_context(decoder, &cdata.hygiene_context, |_, id| {
             debug!("SpecializedDecoder<SyntaxContext>: decoding {}", id);
@@ -471,7 +479,11 @@ impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SyntaxContext {
 impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnId {
     fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> ExpnId {
         let local_cdata = decoder.cdata();
-        let sess = decoder.sess.unwrap();
+
+        let Some(sess) = decoder.sess else {
+            bug!("Cannot decode ExpnId without Session. \
+                You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`.");
+        };
 
         let cnum = CrateNum::decode(decoder);
         let index = u32::decode(decoder);
@@ -520,7 +532,8 @@ impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for Span {
         let hi = lo + len;
 
         let Some(sess) = decoder.sess else {
-            bug!("Cannot decode Span without Session.")
+            bug!("Cannot decode Span without Session. \
+                You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`.")
         };
 
         // Index of the file in the corresponding crate's list of encoded files.

compiler/rustc_middle/src/mir/pretty.rs

@@ -123,6 +123,7 @@ fn dump_matched_mir_node<'tcx, F>(
         // see notes on #41697 above
         let def_path =
             ty::print::with_forced_impl_filename_line!(tcx.def_path_str(body.source.def_id()));
+        // ignore-tidy-odd-backticks the literal below is fine
         write!(file, "// MIR for `{}", def_path)?;
         match body.source.promoted {
             None => write!(file, "`")?,

compiler/rustc_middle/src/ty/error.rs

@@ -151,12 +151,8 @@ impl<'tcx> TypeError<'tcx> {
             .into(),
             RegionsPlaceholderMismatch => "one type is more general than the other".into(),
             ArgumentSorts(values, _) | Sorts(values) => {
-                let mut expected = values.expected.sort_string(tcx);
-                let mut found = values.found.sort_string(tcx);
-                if expected == found {
-                    expected = values.expected.sort_string(tcx);
-                    found = values.found.sort_string(tcx);
-                }
+                let expected = values.expected.sort_string(tcx);
+                let found = values.found.sort_string(tcx);
                 report_maybe_different(&expected, &found).into()
             }
             Traits(values) => {