Auto merge of rust-lang#133561 - GuillaumeGomez:rollup-g4upmv4, r=GuillaumeGomez

Rollup of 12 pull requests

Successful merges:

 - rust-lang#129409 (Expand std::os::unix::fs::chown() doc with a warning)
 - rust-lang#133320 (Add release notes for Rust 1.83.0)
 - rust-lang#133368 (Delay a bug when encountering an impl with unconstrained generics in `codegen_select`)
 - rust-lang#133428 (Actually use placeholder regions for trait method late bound regions in `collect_return_position_impl_trait_in_trait_tys`)
 - rust-lang#133512 (Add `as_array` and `as_mut_array` conversion methods to slices.)
 - rust-lang#133519 (Check `xform_ret_ty` for WF in the new solver to improve method winnowing)
 - rust-lang#133520 (Structurally resolve before applying projection in borrowck)
 - rust-lang#133534 (extend group-forbid-always-trumps-cli test)
 - rust-lang#133537 ([rustdoc] Fix new clippy lints)
 - rust-lang#133543 ([AIX] create shim for lgammaf_r)
 - rust-lang#133547 (rustc_span: Replace a `HashMap<_, ()>` with `HashSet`)
 - rust-lang#133550 (print generated doc paths)

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

Author: bors

RELEASES.md

@@ -7,6 +7,7 @@ use rustc_middle::mir::ConstraintCategory;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable, Upcast};
 use rustc_span::Span;
 use rustc_span::def_id::DefId;
+use rustc_trait_selection::solve::NoSolution;
 use rustc_trait_selection::traits::ObligationCause;
 use rustc_trait_selection::traits::query::type_op::custom::CustomTypeOp;
 use rustc_trait_selection::traits::query::type_op::{self, TypeOpOutput};
@@ -177,6 +178,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         if self.infcx.next_trait_solver() {
             let body = self.body;
             let param_env = self.infcx.param_env;
+            // FIXME: Make this into a real type op?
             self.fully_perform_op(
                 location.to_locations(),
                 ConstraintCategory::Boring,
@@ -213,6 +215,40 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         }
     }
 
+    #[instrument(skip(self), level = "debug")]
+    pub(super) fn structurally_resolve(
+        &mut self,
+        ty: Ty<'tcx>,
+        location: impl NormalizeLocation,
+    ) -> Ty<'tcx> {
+        if self.infcx.next_trait_solver() {
+            let body = self.body;
+            let param_env = self.infcx.param_env;
+            // FIXME: Make this into a real type op?
+            self.fully_perform_op(
+                location.to_locations(),
+                ConstraintCategory::Boring,
+                CustomTypeOp::new(
+                    |ocx| {
+                        ocx.structurally_normalize(
+                            &ObligationCause::misc(
+                                location.to_locations().span(body),
+                                body.source.def_id().expect_local(),
+                            ),
+                            param_env,
+                            ty,
+                        )
+                        .map_err(|_| NoSolution)
+                    },
+                    "normalizing struct tail",
+                ),
+            )
+            .unwrap_or_else(|guar| Ty::new_error(self.tcx(), guar))
+        } else {
+            self.normalize(ty, location)
+        }
+    }
+
     #[instrument(skip(self), level = "debug")]
     pub(super) fn ascribe_user_type(
         &mut self,