Auto merge of rust-lang#120454 - clubby789:cargo-update, r=Nilstrieb

bors · bors · commit 2ef8623e0077 · 2024-02-07T02:05:29.000Z
`cargo update` Run `cargo update`, with some pinning and fixes necessitated by that. This *should* unblock rust-lang#112865 There's a couple of places where I only pinned a dependency in one location - this seems like a bit of a hack, but better than duplicating the FIXME across all `Cargo.toml` where a dependency is introduced. cc `@Nilstrieb`
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/compiler/rustc_ast/Cargo.toml b/compiler/rustc_ast/Cargo.toml
@@ -4,9 +4,10 @@ version = "0.0.0"
 edition = "2021"
 
 [dependencies]
+# FIXME: bumping memchr to 2.7.1 causes linker errors in MSVC thin-lto
 # tidy-alphabetical-start
 bitflags = "2.4.1"
-memchr = "2.5.0"
+memchr = "=2.5.0"
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_index = { path = "../rustc_index" }
 rustc_lexer = { path = "../rustc_lexer" }
diff --git a/compiler/rustc_borrowck/src/lib.rs b/compiler/rustc_borrowck/src/lib.rs
@@ -2479,7 +2479,8 @@ mod diags {
             &mut self,
             span: Span,
         ) -> Option<(DiagnosticBuilder<'tcx>, usize)> {
-            self.diags.buffered_mut_errors.remove(&span)
+            // FIXME(#120456) - is `swap_remove` correct?
+            self.diags.buffered_mut_errors.swap_remove(&span)
         }
 
         pub fn buffer_mut_error(&mut self, span: Span, t: DiagnosticBuilder<'tcx>, count: usize) {
diff --git a/compiler/rustc_borrowck/src/used_muts.rs b/compiler/rustc_borrowck/src/used_muts.rs
@@ -60,7 +60,8 @@ impl GatherUsedMutsVisitor<'_, '_, '_> {
         // be those that were never initialized - we will consider those as being used as
         // they will either have been removed by unreachable code optimizations; or linted
         // as unused variables.
-        self.never_initialized_mut_locals.remove(&into.local);
+        // FIXME(#120456) - is `swap_remove` correct?
+        self.never_initialized_mut_locals.swap_remove(&into.local);
     }
 }
 
diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs
@@ -104,7 +104,8 @@ fn asm_target_features(tcx: TyCtxt<'_>, did: DefId) -> &FxIndexSet<Symbol> {
         match attrs.instruction_set {
             None => {}
             Some(InstructionSetAttr::ArmA32) => {
-                target_features.remove(&sym::thumb_mode);
+                // FIXME(#120456) - is `swap_remove` correct?
+                target_features.swap_remove(&sym::thumb_mode);
             }
             Some(InstructionSetAttr::ArmT32) => {
                 target_features.insert(sym::thumb_mode);
diff --git a/compiler/rustc_const_eval/src/const_eval/machine.rs b/compiler/rustc_const_eval/src/const_eval/machine.rs
@@ -125,7 +125,8 @@ impl<K: Hash + Eq, V> interpret::AllocMap<K, V> for FxIndexMap<K, V> {
     where
         K: Borrow<Q>,
     {
-        FxIndexMap::remove(self, k)
+        // FIXME(#120456) - is `swap_remove` correct?
+        FxIndexMap::swap_remove(self, k)
     }
 
     #[inline(always)]
diff --git a/compiler/rustc_const_eval/src/interpret/intern.rs b/compiler/rustc_const_eval/src/interpret/intern.rs
@@ -50,7 +50,8 @@ fn intern_shallow<'rt, 'mir, 'tcx, T, M: CompileTimeMachine<'mir, 'tcx, T>>(
 ) -> Result<(), ()> {
     trace!("intern_shallow {:?}", alloc_id);
     // remove allocation
-    let Some((_kind, mut alloc)) = ecx.memory.alloc_map.remove(&alloc_id) else {
+    // FIXME(#120456) - is `swap_remove` correct?
+    let Some((_kind, mut alloc)) = ecx.memory.alloc_map.swap_remove(&alloc_id) else {
         return Err(());
     };
     // Set allocation mutability as appropriate. This is used by LLVM to put things into
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
@@ -1635,7 +1635,8 @@ impl HumanEmitter {
                     let mut to_add = FxHashMap::default();
 
                     for (depth, style) in depths {
-                        if multilines.remove(&depth).is_none() {
+                        // FIXME(#120456) - is `swap_remove` correct?
+                        if multilines.swap_remove(&depth).is_none() {
                             to_add.insert(depth, style);
                         }
                     }
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
@@ -692,7 +692,8 @@ impl DiagCtxt {
     pub fn steal_diagnostic(&self, span: Span, key: StashKey) -> Option<DiagnosticBuilder<'_, ()>> {
         let mut inner = self.inner.borrow_mut();
         let key = (span.with_parent(None), key);
-        let diag = inner.stashed_diagnostics.remove(&key)?;
+        // FIXME(#120456) - is `swap_remove` correct?
+        let diag = inner.stashed_diagnostics.swap_remove(&key)?;
         if diag.is_error() {
             if diag.is_lint.is_some() {
                 inner.lint_err_count -= 1;
diff --git a/compiler/rustc_hir_analysis/src/astconv/object_safety.rs b/compiler/rustc_hir_analysis/src/astconv/object_safety.rs
@@ -218,7 +218,8 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         for def_ids in associated_types.values_mut() {
             for (projection_bound, span) in &projection_bounds {
                 let def_id = projection_bound.projection_def_id();
-                def_ids.remove(&def_id);
+                // FIXME(#120456) - is `swap_remove` correct?
+                def_ids.swap_remove(&def_id);
                 if tcx.generics_require_sized_self(def_id) {
                     tcx.emit_node_span_lint(
                         UNUSED_ASSOCIATED_TYPE_BOUNDS,
diff --git a/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs b/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
@@ -1872,7 +1872,8 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> {
         lifetime_ref: &'tcx hir::Lifetime,
         bad_def: ResolvedArg,
     ) {
-        let old_value = self.map.defs.remove(&lifetime_ref.hir_id);
+        // FIXME(#120456) - is `swap_remove` correct?
+        let old_value = self.map.defs.swap_remove(&lifetime_ref.hir_id);
         assert_eq!(old_value, Some(bad_def));
     }
 }
diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
@@ -1550,7 +1550,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         let ctxt = {
             let mut enclosing_breakables = self.enclosing_breakables.borrow_mut();
             debug_assert!(enclosing_breakables.stack.len() == index + 1);
-            enclosing_breakables.by_id.remove(&id).expect("missing breakable context");
+            // FIXME(#120456) - is `swap_remove` correct?
+            enclosing_breakables.by_id.swap_remove(&id).expect("missing breakable context");
             enclosing_breakables.stack.pop().expect("missing breakable context")
         };
         (ctxt, result)
diff --git a/compiler/rustc_infer/src/infer/opaque_types/table.rs b/compiler/rustc_infer/src/infer/opaque_types/table.rs
@@ -20,7 +20,8 @@ impl<'tcx> OpaqueTypeStorage<'tcx> {
         if let Some(idx) = idx {
             self.opaque_types.get_mut(&key).unwrap().hidden_type = idx;
         } else {
-            match self.opaque_types.remove(&key) {
+            // FIXME(#120456) - is `swap_remove` correct?
+            match self.opaque_types.swap_remove(&key) {
                 None => bug!("reverted opaque type inference that was never registered: {:?}", key),
                 Some(_) => {}
             }
diff --git a/compiler/rustc_lint_defs/src/lib.rs b/compiler/rustc_lint_defs/src/lib.rs
@@ -712,7 +712,8 @@ impl LintBuffer {
     }
 
     pub fn take(&mut self, id: NodeId) -> Vec<BufferedEarlyLint> {
-        self.map.remove(&id).unwrap_or_default()
+        // FIXME(#120456) - is `swap_remove` correct?
+        self.map.swap_remove(&id).unwrap_or_default()
     }
 
     pub fn buffer_lint(
diff --git a/compiler/rustc_llvm/Cargo.toml b/compiler/rustc_llvm/Cargo.toml
@@ -9,6 +9,10 @@ libc = "0.2.73"
 # tidy-alphabetical-end
 
 [build-dependencies]
+# FIXME: updating cc past 1.0.79 breaks libstd bootstrapping, pin
+# to the last working version here so `cargo update` doesn't cause the
+# a higher version to be selected
+# https://github.com/rust-lang/cc-rs/issues/913
 # tidy-alphabetical-start
-cc = "1.0.69"
+cc = "=1.0.79"
 # tidy-alphabetical-end
diff --git a/compiler/rustc_mir_transform/src/dest_prop.rs b/compiler/rustc_mir_transform/src/dest_prop.rs
@@ -398,7 +398,8 @@ impl<'alloc> Candidates<'alloc> {
         let candidates = entry.get_mut();
         Self::vec_filter_candidates(p, candidates, f, at);
         if candidates.len() == 0 {
-            entry.remove();
+            // FIXME(#120456) - is `swap_remove` correct?
+            entry.swap_remove();
         }
     }
 
diff --git a/compiler/rustc_passes/src/stability.rs b/compiler/rustc_passes/src/stability.rs
@@ -957,8 +957,9 @@ pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
     // available as we'd like it to be.
     // FIXME: only remove `libc` when `stdbuild` is active.
     // FIXME: remove special casing for `test`.
-    remaining_lib_features.remove(&sym::libc);
-    remaining_lib_features.remove(&sym::test);
+    // FIXME(#120456) - is `swap_remove` correct?
+    remaining_lib_features.swap_remove(&sym::libc);
+    remaining_lib_features.swap_remove(&sym::test);
 
     /// For each feature in `defined_features`..
     ///
@@ -996,7 +997,8 @@ pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
                     unnecessary_stable_feature_lint(tcx, *span, feature, since);
                 }
             }
-            remaining_lib_features.remove(&feature);
+            // FIXME(#120456) - is `swap_remove` correct?
+            remaining_lib_features.swap_remove(&feature);
 
             // `feature` is the feature doing the implying, but `implied_by` is the feature with
             // the attribute that establishes this relationship. `implied_by` is guaranteed to be a
diff --git a/compiler/rustc_resolve/src/check_unused.rs b/compiler/rustc_resolve/src/check_unused.rs
@@ -92,7 +92,8 @@ impl<'a, 'b, 'tcx> UnusedImportCheckVisitor<'a, 'b, 'tcx> {
         } else {
             // This trait import is definitely used, in a way other than
             // method resolution.
-            self.r.maybe_unused_trait_imports.remove(&def_id);
+            // FIXME(#120456) - is `swap_remove` correct?
+            self.r.maybe_unused_trait_imports.swap_remove(&def_id);
             if let Some(i) = self.unused_imports.get_mut(&self.base_id) {
                 i.unused.remove(&id);
             }
diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
@@ -524,13 +524,15 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                             if let Entry::Occupied(v) = vid_map.entry(*smaller) {
                                 let smaller_deps = v.into_mut();
                                 smaller_deps.larger.insert(*larger);
-                                smaller_deps.larger.remove(&target);
+                                // FIXME(#120456) - is `swap_remove` correct?
+                                smaller_deps.larger.swap_remove(&target);
                             }
 
                             if let Entry::Occupied(v) = vid_map.entry(*larger) {
                                 let larger_deps = v.into_mut();
                                 larger_deps.smaller.insert(*smaller);
-                                larger_deps.smaller.remove(&target);
+                                // FIXME(#120456) - is `swap_remove` correct?
+                                larger_deps.smaller.swap_remove(&target);
                             }
                         }
                         (&RegionTarget::RegionVid(v1), &RegionTarget::Region(r1)) => {
@@ -543,13 +545,15 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                             if let Entry::Occupied(v) = vid_map.entry(*smaller) {
                                 let smaller_deps = v.into_mut();
                                 smaller_deps.larger.insert(*larger);
-                                smaller_deps.larger.remove(&target);
+                                // FIXME(#120456) - is `swap_remove` correct?
+                                smaller_deps.larger.swap_remove(&target);
                             }
 
                             if let Entry::Occupied(v) = vid_map.entry(*larger) {
                                 let larger_deps = v.into_mut();
                                 larger_deps.smaller.insert(*smaller);
-                                larger_deps.smaller.remove(&target);
+                                // FIXME(#120456) - is `swap_remove` correct?
+                                larger_deps.smaller.swap_remove(&target);
                             }
                         }
                     }
diff --git a/compiler/rustc_trait_selection/src/traits/specialize/mod.rs b/compiler/rustc_trait_selection/src/traits/specialize/mod.rs
@@ -516,7 +516,8 @@ pub(crate) fn to_pretty_impl_header(tcx: TyCtxt<'_>, impl_def_id: DefId) -> Opti
     for (p, _) in predicates {
         if let Some(poly_trait_ref) = p.as_trait_clause() {
             if Some(poly_trait_ref.def_id()) == sized_trait {
-                types_without_default_bounds.remove(&poly_trait_ref.self_ty().skip_binder());
+                // FIXME(#120456) - is `swap_remove` correct?
+                types_without_default_bounds.swap_remove(&poly_trait_ref.self_ty().skip_binder());
                 continue;
             }
         }
diff --git a/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.lock b/src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "r-efi"
-version = "4.2.0"
+version = "4.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "575fc2d9b3da54adbdfaddf6eca48fec256d977c8630a1750b8991347d1ac911"
+checksum = "0e244f96e03a3067f9e521d3167bd42657594cb8588c8d3a2db01545dc1af2e0"
 
 [[package]]
 name = "uefi_qemu_test"
diff --git a/src/tools/clippy/clippy_lints/src/copies.rs b/src/tools/clippy/clippy_lints/src/copies.rs
@@ -511,7 +511,8 @@ fn scan_block_for_eq<'tcx>(
                 for stmt in &stmts[stmts.len() - init..=stmts.len() - offset] {
                     if let StmtKind::Local(l) = stmt.kind {
                         l.pat.each_binding_or_first(&mut |_, id, _, _| {
-                            eq.locals.remove(&id);
+                            // FIXME(rust/#120456) - is `swap_remove` correct?
+                            eq.locals.swap_remove(&id);
                         });
                     }
                 }
diff --git a/src/tools/clippy/clippy_lints/src/escape.rs b/src/tools/clippy/clippy_lints/src/escape.rs
@@ -138,15 +138,17 @@ impl<'a, 'tcx> Delegate<'tcx> for EscapeDelegate<'a, 'tcx> {
     fn consume(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId) {
         if cmt.place.projections.is_empty() {
             if let PlaceBase::Local(lid) = cmt.place.base {
-                self.set.remove(&lid);
+                // FIXME(rust/#120456) - is `swap_remove` correct?
+                self.set.swap_remove(&lid);
             }
         }
     }
 
     fn borrow(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId, _: ty::BorrowKind) {
         if cmt.place.projections.is_empty() {
             if let PlaceBase::Local(lid) = cmt.place.base {
-                self.set.remove(&lid);
+                // FIXME(rust/#120456) - is `swap_remove` correct?
+                self.set.swap_remove(&lid);
             }
         }
     }
diff --git a/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs b/src/tools/clippy/clippy_lints/src/index_refutable_slice.rs
@@ -106,7 +106,8 @@ fn find_slice_values(cx: &LateContext<'_>, pat: &hir::Pat<'_>) -> FxIndexMap<hir
             }
             if sub_pat.is_some() {
                 removed_pat.insert(value_hir_id);
-                slices.remove(&value_hir_id);
+                // FIXME(rust/#120456) - is `swap_remove` correct?
+                slices.swap_remove(&value_hir_id);
                 return;
             }
 
@@ -264,7 +265,8 @@ impl<'a, 'tcx> Visitor<'tcx> for SliceIndexLintingVisitor<'a, 'tcx> {
             }
 
             // The slice was used for something other than indexing
-            self.slice_lint_info.remove(&local_id);
+            // FIXME(rust/#120456) - is `swap_remove` correct?
+            self.slice_lint_info.swap_remove(&local_id);
         }
         intravisit::walk_expr(self, expr);
     }
diff --git a/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs b/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs
@@ -415,6 +415,7 @@ fn pat_contains_local(pat: &Pat<'_>, id: HirId) -> bool {
 /// Returns true if all the bindings in the `Pat` are in `ids` and vice versa
 fn bindings_eq(pat: &Pat<'_>, mut ids: HirIdSet) -> bool {
     let mut result = true;
-    pat.each_binding_or_first(&mut |_, id, _, _| result &= ids.remove(&id));
+    // FIXME(rust/#120456) - is `swap_remove` correct?
+    pat.each_binding_or_first(&mut |_, id, _, _| result &= ids.swap_remove(&id));
     result && ids.is_empty()
 }
diff --git a/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs b/src/tools/clippy/clippy_lints/src/needless_pass_by_ref_mut.rs
@@ -382,7 +382,8 @@ impl<'tcx> euv::Delegate<'tcx> for MutablyUsedVariablesCtxt<'tcx> {
                 self.add_mutably_used_var(*vid);
             }
             self.prev_bind = None;
-            self.prev_move_to_closure.remove(vid);
+            // FIXME(rust/#120456) - is `swap_remove` correct?
+            self.prev_move_to_closure.swap_remove(vid);
         }
     }
 
diff --git a/src/tools/clippy/clippy_lints/src/no_effect.rs b/src/tools/clippy/clippy_lints/src/no_effect.rs
@@ -98,7 +98,8 @@ impl<'tcx> LateLintPass<'tcx> for NoEffect {
 
     fn check_block_post(&mut self, cx: &LateContext<'tcx>, _: &'tcx rustc_hir::Block<'tcx>) {
         for hir_id in self.local_bindings.pop().unwrap() {
-            if let Some(span) = self.underscore_bindings.remove(&hir_id) {
+            // FIXME(rust/#120456) - is `swap_remove` correct?
+            if let Some(span) = self.underscore_bindings.swap_remove(&hir_id) {
                 span_lint_hir(
                     cx,
                     NO_EFFECT_UNDERSCORE_BINDING,
@@ -112,7 +113,8 @@ impl<'tcx> LateLintPass<'tcx> for NoEffect {
 
     fn check_expr(&mut self, _: &LateContext<'tcx>, expr: &'tcx rustc_hir::Expr<'tcx>) {
         if let Some(def_id) = path_to_local(expr) {
-            self.underscore_bindings.remove(&def_id);
+            // FIXME(rust/#120456) - is `swap_remove` correct?
+            self.underscore_bindings.swap_remove(&def_id);
         }
     }
 }
diff --git a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs
@@ -153,7 +153,8 @@ impl Params {
             param.uses = Vec::new();
             let key = (param.fn_id, param.idx);
             self.by_fn.remove(&key);
-            self.by_id.remove(&id);
+            // FIXME(rust/#120456) - is `swap_remove` correct?
+            self.by_id.swap_remove(&id);
         }
     }
 
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
@@ -217,6 +217,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "darling_core",
     "darling_macro",
     "datafrog",
+    "deranged",
     "derivative",
     "derive_more",
     "derive_setters",
@@ -258,7 +259,6 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "indexmap",
     "intl-memoizer",
     "intl_pluralrules",
-    "is-terminal",
     "itertools",
     "itoa",
     "jemalloc-sys",
@@ -290,6 +290,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "pin-project-lite",
     "polonius-engine",
     "portable-atomic", // dependency for platforms doesn't support `AtomicU64` in std
+    "powerfmt",
     "ppv-lite86",
     "proc-macro-hack",
     "proc-macro2",
diff --git a/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr b/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.stderr
diff --git a/tests/ui-fulldeps/session-diagnostic/subdiagnostic-derive.stderr b/tests/ui-fulldeps/session-diagnostic/subdiagnostic-derive.stderr

Original file line number	Diff line number	Diff line change
`@@ -2479,7 +2479,8 @@ mod diags {`
`2479`	`2479`	`&mut self,`
`2480`	`2480`	`span: Span,`
`2481`	`2481`	`) -> Option<(DiagnosticBuilder<'tcx>, usize)> {`
`2482`		`- self.diags.buffered_mut_errors.remove(&span)`
	`2482`	+ // FIXME(#120456) - is `swap_remove` correct?
	`2483`	`+ self.diags.buffered_mut_errors.swap_remove(&span)`
`2483`	`2484`	`}`
`2484`	`2485`
`2485`	`2486`	`pub fn buffer_mut_error(&mut self, span: Span, t: DiagnosticBuilder<'tcx>, count: usize) {`
Original file line number	Diff line number	Diff line change
`@@ -60,7 +60,8 @@ impl GatherUsedMutsVisitor<'_, '_, '_> {`
`60`	`60`	`// be those that were never initialized - we will consider those as being used as`
`61`	`61`	`// they will either have been removed by unreachable code optimizations; or linted`
`62`	`62`	`// as unused variables.`
`63`		`- self.never_initialized_mut_locals.remove(&into.local);`
	`63`	+ // FIXME(#120456) - is `swap_remove` correct?
	`64`	`+ self.never_initialized_mut_locals.swap_remove(&into.local);`
`64`	`65`	`}`
`65`	`66`	`}`
`66`	`67`
Original file line number	Diff line number	Diff line change
`@@ -125,7 +125,8 @@ impl<K: Hash + Eq, V> interpret::AllocMap<K, V> for FxIndexMap<K, V> {`
`125`	`125`	`where`
`126`	`126`	`K: Borrow<Q>,`
`127`	`127`	`{`
`128`		`- FxIndexMap::remove(self, k)`
	`128`	+ // FIXME(#120456) - is `swap_remove` correct?
	`129`	`+ FxIndexMap::swap_remove(self, k)`
`129`	`130`	`}`
`130`	`131`
`131`	`132`	`#[inline(always)]`
Original file line number	Diff line number	Diff line change
`@@ -1635,7 +1635,8 @@ impl HumanEmitter {`
`1635`	`1635`	`let mut to_add = FxHashMap::default();`
`1636`	`1636`
`1637`	`1637`	`for (depth, style) in depths {`
`1638`		`- if multilines.remove(&depth).is_none() {`
	`1638`	+ // FIXME(#120456) - is `swap_remove` correct?
	`1639`	`+ if multilines.swap_remove(&depth).is_none() {`
`1639`	`1640`	`to_add.insert(depth, style);`
`1640`	`1641`	`}`
`1641`	`1642`	`}`