Auto merge of rust-lang#105892 - Dylan-DPC:rollup-eozolx4, r=Dylan-DPC

Rollup of 5 pull requests

Successful merges:

 - rust-lang#105682 (Use `expose_addr()` in `fmt::Pointer`)
 - rust-lang#105839 (Suggest a `T: Send` bound for `&mut T` upvars in `Send` generators)
 - rust-lang#105864 (clippy::complexity fixes)
 - rust-lang#105882 (Don't ICE in closure arg borrow suggestion)
 - rust-lang#105889 (Fix `uninlined_format_args` in libtest)

Failed merges:

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

Author: bors

compiler/rustc_ast_lowering/src/lib.rs

@@ -600,7 +600,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         self.impl_trait_defs = current_impl_trait_defs;
         self.impl_trait_bounds = current_impl_trait_bounds;
 
-        debug_assert!(self.children.iter().find(|(id, _)| id == &def_id).is_none());
+        debug_assert!(!self.children.iter().any(|(id, _)| id == &def_id));
         self.children.push((def_id, hir::MaybeOwner::Owner(info)));
     }
 

compiler/rustc_borrowck/src/lib.rs

@@ -2059,12 +2059,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
     ) -> Option<InitIndex> {
         let mpi = self.move_data.rev_lookup.find_local(local);
         let ii = &self.move_data.init_path_map[mpi];
-        for &index in ii {
-            if flow_state.ever_inits.contains(index) {
-                return Some(index);
-            }
-        }
-        None
+        ii.into_iter().find(|&&index| flow_state.ever_inits.contains(index)).copied()
     }
 
     /// Adds the place into the used mutable variables set

compiler/rustc_codegen_llvm/src/builder.rs

@@ -233,8 +233,8 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         // Set KCFI operand bundle
         let is_indirect_call = unsafe { llvm::LLVMIsAFunction(llfn).is_none() };
         let kcfi_bundle =
-            if self.tcx.sess.is_sanitizer_kcfi_enabled() && fn_abi.is_some() && is_indirect_call {
-                let kcfi_typeid = kcfi_typeid_for_fnabi(self.tcx, fn_abi.unwrap());
+            if self.tcx.sess.is_sanitizer_kcfi_enabled() && let Some(fn_abi) = fn_abi && is_indirect_call {
+                let kcfi_typeid = kcfi_typeid_for_fnabi(self.tcx, fn_abi);
                 Some(llvm::OperandBundleDef::new("kcfi", &[self.const_u32(kcfi_typeid)]))
             } else {
                 None

compiler/rustc_codegen_ssa/src/back/archive.rs

@@ -123,7 +123,7 @@ fn try_filter_fat_archs<'a>(
 ) -> io::Result<Option<(&'a [u8], u64)>> {
     let archs = archs.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
 
-    let desired = match archs.iter().filter(|a| a.architecture() == target_arch).next() {
+    let desired = match archs.iter().find(|a| a.architecture() == target_arch) {
         Some(a) => a,
         None => return Ok(None),
     };

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -1124,9 +1124,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
 
         let hir = self.tcx.hir();
-        let cond_parent = hir.parent_iter(expr.hir_id).skip_while(|(_, node)| {
-            matches!(node, hir::Node::Expr(hir::Expr { kind: hir::ExprKind::Binary(op, _, _), .. }) if op.node == hir::BinOpKind::And)
-        }).next();
+        let cond_parent = hir.parent_iter(expr.hir_id).find(|(_, node)| {
+            !matches!(node, hir::Node::Expr(hir::Expr { kind: hir::ExprKind::Binary(op, _, _), .. }) if op.node == hir::BinOpKind::And)
+        });
         // Don't suggest:
         //     `let Some(_) = a.is_some() && b`
         //                     ++++++++++

compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs

@@ -488,7 +488,7 @@ impl<'cx, 'tcx> LexicalResolver<'cx, 'tcx> {
                         // If this empty region is from a universe that can
                         // name the placeholder, then the placeholder is
                         // larger; otherwise, the only ancestor is `'static`.
-                        if a_ui.can_name(placeholder.universe) { true } else { false }
+                        return a_ui.can_name(placeholder.universe);
                     }
                 }
             }

compiler/rustc_infer/src/infer/undo_log.rs

@@ -87,18 +87,12 @@ impl<'tcx> Rollback<UndoLog<'tcx>> for InferCtxtInner<'tcx> {
 
 /// The combined undo log for all the various unification tables. For each change to the storage
 /// for any kind of inference variable, we record an UndoLog entry in the vector here.
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub(crate) struct InferCtxtUndoLogs<'tcx> {
     logs: Vec<UndoLog<'tcx>>,
     num_open_snapshots: usize,
 }
 
-impl Default for InferCtxtUndoLogs<'_> {
-    fn default() -> Self {
-        Self { logs: Default::default(), num_open_snapshots: Default::default() }
-    }
-}
-
 /// The UndoLogs trait defines how we undo a particular kind of action (of type T). We can undo any
 /// action that is convertible into an UndoLog (per the From impls above).
 impl<'tcx, T> UndoLogs<T> for InferCtxtUndoLogs<'tcx>

compiler/rustc_middle/src/middle/privacy.rs

@@ -103,12 +103,7 @@ impl EffectiveVisibilities {
 
     pub fn public_at_level(&self, id: LocalDefId) -> Option<Level> {
         self.effective_vis(id).and_then(|effective_vis| {
-            for level in Level::all_levels() {
-                if effective_vis.is_public_at_level(level) {
-                    return Some(level);
-                }
-            }
-            None
+            Level::all_levels().into_iter().find(|&level| effective_vis.is_public_at_level(level))
         })
     }
 

compiler/rustc_mir_transform/src/sroa.rs

@@ -182,7 +182,7 @@ fn replace_flattened_locals<'tcx>(
     let mut fragments = IndexVec::new();
     for (k, v) in &replacements.fields {
         fragments.ensure_contains_elem(k.local, || Vec::new());
-        fragments[k.local].push((&k.projection[..], *v));
+        fragments[k.local].push((k.projection, *v));
     }
     debug!(?fragments);
 

compiler/rustc_monomorphize/src/collector.rs

@@ -595,8 +595,8 @@ fn check_recursion_limit<'tcx>(
         let def_path_str = tcx.def_path_str(def_id);
         let (shrunk, written_to_path) = shrunk_instance_name(tcx, &instance);
         let mut path = PathBuf::new();
-        let was_written = if written_to_path.is_some() {
-            path = written_to_path.unwrap();
+        let was_written = if let Some(written_to_path) = written_to_path {
+            path = written_to_path;
             Some(())
         } else {
             None