Actually use precise capturing in favor of outlives

compiler/rustc_borrowck/src/borrow_set.rs

@@ -159,7 +159,7 @@ impl<'tcx> BorrowSet<'tcx> {
         self.location_map.len()
     }
 
-    pub(crate) fn indices(&self) -> impl Iterator<Item = BorrowIndex> + 'static {
+    pub(crate) fn indices(&self) -> impl Iterator<Item = BorrowIndex> + use<> {
         BorrowIndex::ZERO..BorrowIndex::from_usize(self.len())
     }
 

compiler/rustc_borrowck/src/lib.rs

@@ -2,6 +2,7 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]

compiler/rustc_borrowck/src/universal_regions.rs

@@ -310,7 +310,7 @@ impl<'tcx> UniversalRegions<'tcx> {
 
     /// Returns an iterator over all the RegionVids corresponding to
     /// universally quantified free regions.
-    pub(crate) fn universal_regions(&self) -> impl Iterator<Item = RegionVid> + 'static {
+    pub(crate) fn universal_regions(&self) -> impl Iterator<Item = RegionVid> + use<> {
         (FIRST_GLOBAL_INDEX..self.num_universals).map(RegionVid::from_usize)
     }
 

compiler/rustc_codegen_ssa/src/lib.rs

@@ -2,6 +2,7 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]

compiler/rustc_codegen_ssa/src/mir/locals.rs

@@ -32,7 +32,9 @@ impl<'tcx, V> Locals<'tcx, V> {
         Locals { values: IndexVec::default() }
     }
 
-    pub(super) fn indices(&self) -> impl DoubleEndedIterator<Item = mir::Local> + Clone + 'static {
+    pub(super) fn indices(
+        &self,
+    ) -> impl DoubleEndedIterator<Item = mir::Local> + Clone + use<'tcx, V> {
         self.values.indices()
     }
 }

compiler/rustc_data_structures/src/graph/scc/mod.rs

@@ -133,7 +133,7 @@ impl<N: Idx, S: Idx + Ord, A: Annotation> Sccs<N, S, A> {
     /// meaning that if `S1 -> S2`, we will visit `S2` first and `S1` after.
     /// This is convenient when the edges represent dependencies: when you visit
     /// `S1`, the value for `S2` will already have been computed.
-    pub fn all_sccs(&self) -> impl Iterator<Item = S> + 'static {
+    pub fn all_sccs(&self) -> impl Iterator<Item = S> + use<N, S, A> {
         (0..self.scc_data.len()).map(S::new)
     }
 

compiler/rustc_data_structures/src/lib.rs

@@ -10,6 +10,7 @@
 #![allow(internal_features)]
 #![allow(rustc::default_hash_types)]
 #![allow(rustc::potential_query_instability)]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![cfg_attr(not(parallel_compiler), feature(cell_leak))]
 #![deny(unsafe_op_in_unsafe_fn)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]

compiler/rustc_expand/src/expand.rs

@@ -1727,7 +1727,7 @@ fn build_single_delegations<'a, Node: InvocationCollectorNode>(
     suffixes: &'a [(Ident, Option<Ident>)],
     item_span: Span,
     from_glob: bool,
-) -> impl Iterator<Item = ast::Item<Node::ItemKind>> + 'a {
+) -> impl Iterator<Item = ast::Item<Node::ItemKind>> + use<'a, Node> {
     if suffixes.is_empty() {
         // Report an error for now, to avoid keeping stem for resolution and
         // stability checks.

compiler/rustc_expand/src/lib.rs

@@ -1,6 +1,7 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![doc(rust_logo)]
 #![feature(array_windows)]
 #![feature(associated_type_defaults)]

compiler/rustc_expand/src/proc_macro.rs

@@ -31,7 +31,7 @@ impl<T> pm::bridge::server::MessagePipe<T> for MessagePipe<T> {
     }
 }
 
-fn exec_strategy(ecx: &ExtCtxt<'_>) -> impl pm::bridge::server::ExecutionStrategy + 'static {
+fn exec_strategy(ecx: &ExtCtxt<'_>) -> impl pm::bridge::server::ExecutionStrategy + use<> {
     pm::bridge::server::MaybeCrossThread::<MessagePipe<_>>::new(
         ecx.sess.opts.unstable_opts.proc_macro_execution_strategy
             == ProcMacroExecutionStrategy::CrossThread,

compiler/rustc_index/src/lib.rs

@@ -1,5 +1,6 @@
 // tidy-alphabetical-start
 #![cfg_attr(all(feature = "nightly", test), feature(stmt_expr_attributes))]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![cfg_attr(feature = "nightly", allow(internal_features))]
 #![cfg_attr(feature = "nightly", feature(extend_one, new_uninit, step_trait, test))]
 #![cfg_attr(feature = "nightly", feature(new_zeroed_alloc))]

compiler/rustc_index/src/slice.rs

@@ -70,7 +70,7 @@ impl<I: Idx, T> IndexSlice<I, T> {
     #[inline]
     pub fn indices(
         &self,
-    ) -> impl DoubleEndedIterator<Item = I> + ExactSizeIterator + Clone + 'static {
+    ) -> impl DoubleEndedIterator<Item = I> + ExactSizeIterator + Clone + use<I, T> {
         (0..self.len()).map(|n| I::new(n))
     }
 

compiler/rustc_trait_selection/src/error_reporting/infer/need_type_info.rs

@@ -978,7 +978,7 @@ impl<'a, 'tcx> FindInferSourceVisitor<'a, 'tcx> {
         &self,
         path: &'tcx hir::Path<'tcx>,
         args: GenericArgsRef<'tcx>,
-    ) -> impl Iterator<Item = InsertableGenericArgs<'tcx>> + 'tcx {
+    ) -> impl Iterator<Item = InsertableGenericArgs<'tcx>> + use<'tcx> {
         let tcx = self.tecx.tcx;
         let have_turbofish = path.segments.iter().any(|segment| {
             segment.args.is_some_and(|args| args.args.iter().any(|arg| arg.is_ty_or_const()))

compiler/rustc_trait_selection/src/lib.rs

@@ -14,6 +14,7 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(precise_capturing))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]

compiler/rustc_trait_selection/src/solve/fulfill.rs

@@ -69,7 +69,9 @@ impl<'tcx> ObligationStorage<'tcx> {
         obligations
     }
 
-    fn unstalled_for_select(&mut self) -> impl Iterator<Item = PredicateObligation<'tcx>> + 'tcx {
+    fn unstalled_for_select(
+        &mut self,
+    ) -> impl Iterator<Item = PredicateObligation<'tcx>> + use<'tcx> {
         mem::take(&mut self.pending).into_iter()
     }