Auto merge of #123194 - matthiaskrgr:rollup-vhdc8hw, r=matthiaskrgr

Rollup of 4 pull requests

Successful merges:

 - #123176 (Normalize the result of `Fields::ty_with_args`)
 - #123186 (copy any file from stage0/lib to stage0-sysroot/lib)
 - #123187 (Forward port 1.77.1 release notes)
 - #123188 (compiler: fix few unused_peekable and needless_pass_by_ref_mut clippy lints)

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

5 files changed, 6 insertions, 6 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index 28f4f81e7d8..fe2691e9d4d 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -4931,7 +4931,7 @@ fn point_at_assoc_type_restriction<G: EmissionGuarantee>(
         let hir::WherePredicate::BoundPredicate(pred) = pred else {
             continue;
         };
-        let mut bounds = pred.bounds.iter().peekable();
+        let mut bounds = pred.bounds.iter();
         while let Some(bound) = bounds.next() {
             let Some(trait_ref) = bound.trait_ref() else {
                 continue;
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index 12371155303..c33e24b1094 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -508,7 +508,7 @@ pub(super) fn opt_normalize_projection_type<'a, 'b, 'tcx>(
 /// because it contains `[type error]`. Yuck! (See issue #29857 for
 /// one case where this arose.)
 fn normalize_to_error<'a, 'tcx>(
-    selcx: &mut SelectionContext<'a, 'tcx>,
+    selcx: &SelectionContext<'a, 'tcx>,
     param_env: ty::ParamEnv<'tcx>,
     projection_ty: ty::AliasTy<'tcx>,
     cause: ObligationCause<'tcx>,
diff --git a/compiler/rustc_trait_selection/src/traits/specialize/mod.rs b/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
index 27dd8f26489..43c750ebbb5 100644
--- a/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
@@ -239,10 +239,10 @@ fn fulfill_implication<'tcx>(
 
     let source_trait = ImplSubject::Trait(source_trait_ref);
 
-    let selcx = &mut SelectionContext::new(infcx);
+    let selcx = SelectionContext::new(infcx);
     let target_args = infcx.fresh_args_for_item(DUMMY_SP, target_impl);
     let (target_trait, obligations) =
-        util::impl_subject_and_oblig(selcx, param_env, target_impl, target_args, error_cause);
+        util::impl_subject_and_oblig(&selcx, param_env, target_impl, target_args, error_cause);
 
     // do the impls unify? If not, no specialization.
     let Ok(InferOk { obligations: more_obligations, .. }) = infcx
diff --git a/compiler/rustc_trait_selection/src/traits/specialize/specialization_graph.rs b/compiler/rustc_trait_selection/src/traits/specialize/specialization_graph.rs
index 1aa65b87f0b..dba014d58b0 100644
--- a/compiler/rustc_trait_selection/src/traits/specialize/specialization_graph.rs
+++ b/compiler/rustc_trait_selection/src/traits/specialize/specialization_graph.rs
@@ -198,7 +198,7 @@ impl<'tcx> Children {
     }
 }
 
-fn iter_children(children: &mut Children) -> impl Iterator<Item = DefId> + '_ {
+fn iter_children(children: &Children) -> impl Iterator<Item = DefId> + '_ {
     let nonblanket = children.non_blanket_impls.iter().flat_map(|(_, v)| v.iter());
     children.blanket_impls.iter().chain(nonblanket).cloned()
 }
diff --git a/compiler/rustc_trait_selection/src/traits/util.rs b/compiler/rustc_trait_selection/src/traits/util.rs
index 29d063321a7..466a53d8ce0 100644
--- a/compiler/rustc_trait_selection/src/traits/util.rs
+++ b/compiler/rustc_trait_selection/src/traits/util.rs
@@ -205,7 +205,7 @@ impl Iterator for SupertraitDefIds<'_> {
 /// returning the resulting subject and all obligations that arise.
 /// The obligations are closed under normalization.
 pub fn impl_subject_and_oblig<'a, 'tcx>(
-    selcx: &mut SelectionContext<'a, 'tcx>,
+    selcx: &SelectionContext<'a, 'tcx>,
     param_env: ty::ParamEnv<'tcx>,
     impl_def_id: DefId,
     impl_args: GenericArgsRef<'tcx>,