Auto merge of rust-lang#84864 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum

[stable] 1.52.0 release

This includes the release notes (rust-lang#84183) as well as cherry-picked commits from:

* [beta] revert PR rust-lang#77885 rust-lang#84710
* [beta] remove assert_matches rust-lang#84759
* Revert PR 81473 to resolve (on beta) issues 81626 and 81658. rust-lang#83171
* [beta] rustdoc revert deref recur rust-lang#84868
*  Fix ICE of for-loop mut borrowck where no suggestions are available rust-lang#83401

Additionally in "fresh work" we're also:

* reverting: directly expose copy and copy_nonoverlapping intrinsics rust-lang#81238 to avoid rust-lang#84297 on 1.52

Author: bors

RELEASES.md

@@ -1,5 +1,4 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![feature(assert_matches)]
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(drain_filter)]

compiler/rustc_codegen_ssa/src/lib.rs

@@ -45,11 +45,7 @@ impl<'ctx> rustc_ast::HashStableContext for StableHashingContext<'ctx> {
             item.hash_stable(self, hasher);
             style.hash_stable(self, hasher);
             span.hash_stable(self, hasher);
-            assert_matches!(
-                tokens.as_ref(),
-                None,
-                "Tokens should have been removed during lowering!"
-            );
+            assert!(tokens.as_ref().is_none(), "Tokens should have been removed during lowering!");
         } else {
             unreachable!();
         }

compiler/rustc_middle/src/ich/impls_syntax.rs

@@ -24,7 +24,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
-#![feature(assert_matches)]
 #![feature(backtrace)]
 #![feature(bool_to_option)]
 #![feature(box_patterns)]

compiler/rustc_middle/src/lib.rs

@@ -339,7 +339,7 @@ impl<'tcx, Tag: Copy, Extra: AllocationExtra<Tag>> Allocation<Tag, Extra> {
         for dest in bytes {
             *dest = src.next().expect("iterator was shorter than it said it would be");
         }
-        assert_matches!(src.next(), None, "iterator was longer than it said it would be");
+        assert!(src.next().is_none(), "iterator was longer than it said it would be");
         Ok(())
     }
 

compiler/rustc_middle/src/mir/interpret/allocation.rs

@@ -642,15 +642,18 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                                         .starts_with(&original_method_ident.name.to_string())
                             })
                             .map(|ident| format!("{}()", ident))
+                            .peekable()
                     });
 
-                if let Some(suggestions) = opt_suggestions {
-                    err.span_suggestions(
-                        path_segment.ident.span,
-                        &format!("use mutable method"),
-                        suggestions,
-                        Applicability::MaybeIncorrect,
-                    );
+                if let Some(mut suggestions) = opt_suggestions {
+                    if suggestions.peek().is_some() {
+                        err.span_suggestions(
+                            path_segment.ident.span,
+                            &format!("use mutable method"),
+                            suggestions,
+                            Applicability::MaybeIncorrect,
+                        );
+                    }
                 }
             }
         };

compiler/rustc_mir/src/borrow_check/diagnostics/mutability_errors.rs

@@ -854,11 +854,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
             Some(ptr) => ptr,
             None => {
                 // zero-sized access
-                assert_matches!(
-                    src.next(),
-                    None,
-                    "iterator said it was empty but returned an element"
-                );
+                assert!(src.next().is_none(), "iterator said it was empty but returned an element");
                 return Ok(());
             }
         };
@@ -884,11 +880,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
             Some(ptr) => ptr,
             None => {
                 // zero-sized access
-                assert_matches!(
-                    src.next(),
-                    None,
-                    "iterator said it was empty but returned an element"
-                );
+                assert!(src.next().is_none(), "iterator said it was empty but returned an element");
                 return Ok(());
             }
         };
@@ -902,7 +894,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
             let offset_ptr = ptr.offset(Size::from_bytes(idx) * 2, &tcx)?; // `Size` multiplication
             allocation.write_scalar(&tcx, offset_ptr, val.into(), Size::from_bytes(2))?;
         }
-        assert_matches!(src.next(), None, "iterator was longer than it said it would be");
+        assert!(src.next().is_none(), "iterator was longer than it said it would be");
         Ok(())
     }
 

compiler/rustc_mir/src/interpret/memory.rs

@@ -7,7 +7,6 @@ Rust MIR: a lowered representation of Rust.
 #![feature(nll)]
 #![feature(in_band_lifetimes)]
 #![feature(array_windows)]
-#![feature(assert_matches)]
 #![feature(bindings_after_at)]
 #![feature(bool_to_option)]
 #![feature(box_patterns)]

compiler/rustc_mir/src/lib.rs

@@ -133,22 +133,6 @@ impl<'tcx> MarkSymbolVisitor<'tcx> {
         }
     }
 
-    fn handle_assign(&mut self, expr: &'tcx hir::Expr<'tcx>) {
-        if self
-            .typeck_results()
-            .expr_adjustments(expr)
-            .iter()
-            .any(|adj| matches!(adj.kind, ty::adjustment::Adjust::Deref(_)))
-        {
-            self.visit_expr(expr);
-        } else if let hir::ExprKind::Field(base, ..) = expr.kind {
-            // Ignore write to field
-            self.handle_assign(base);
-        } else {
-            self.visit_expr(expr);
-        }
-    }
-
     fn handle_field_pattern_match(
         &mut self,
         lhs: &hir::Pat<'_>,
@@ -277,11 +261,6 @@ impl<'tcx> Visitor<'tcx> for MarkSymbolVisitor<'tcx> {
             hir::ExprKind::MethodCall(..) => {
                 self.lookup_and_handle_method(expr.hir_id);
             }
-            hir::ExprKind::Assign(ref left, ref right, ..) => {
-                self.handle_assign(left);
-                self.visit_expr(right);
-                return;
-            }
             hir::ExprKind::Field(ref lhs, ..) => {
                 self.handle_field_access(&lhs, expr.hir_id);
             }

compiler/rustc_passes/src/dead.rs

@@ -12,7 +12,8 @@ pub fn target() -> Target {
         arch: "x86".to_string(),
         options: TargetOptions {
             max_atomic_width: Some(64),
-            stack_probes: StackProbeType::InlineOrCall { min_llvm_version_for_inline: (11, 0, 1) },
+            // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
+            stack_probes: StackProbeType::Call,
             ..base
         },
     }