3 files changed, 18 insertions, 14 deletions
diff --git a/compiler/rustc_mir/src/transform/coverage/graph.rs b/compiler/rustc_mir/src/transform/coverage/graph.rs
index 32febcec7af..d78ad6ce97f 100644
--- a/compiler/rustc_mir/src/transform/coverage/graph.rs
+++ b/compiler/rustc_mir/src/transform/coverage/graph.rs
@@ -491,15 +491,19 @@ fn bcb_filtered_successors<'a, 'tcx>(
     term_kind: &'tcx TerminatorKind<'tcx>,
 ) -> Box<dyn Iterator<Item = &'a BasicBlock> + 'a> {
     let mut successors = term_kind.successors();
-    box match &term_kind {
-        // SwitchInt successors are never unwind, and all of them should be traversed.
-        TerminatorKind::SwitchInt { .. } => successors,
-        // For all other kinds, return only the first successor, if any, and ignore unwinds.
-        // NOTE: `chain(&[])` is required to coerce the `option::iter` (from
-        // `next().into_iter()`) into the `mir::Successors` aliased type.
-        _ => successors.next().into_iter().chain(&[]),
-    }
-    .filter(move |&&successor| body[successor].terminator().kind != TerminatorKind::Unreachable)
+    Box::new(
+        match &term_kind {
+            // SwitchInt successors are never unwind, and all of them should be traversed.
+            TerminatorKind::SwitchInt { .. } => successors,
+            // For all other kinds, return only the first successor, if any, and ignore unwinds.
+            // NOTE: `chain(&[])` is required to coerce the `option::iter` (from
+            // `next().into_iter()`) into the `mir::Successors` aliased type.
+            _ => successors.next().into_iter().chain(&[]),
+        }
+        .filter(move |&&successor| {
+            body[successor].terminator().kind != TerminatorKind::Unreachable
+        }),
+    )
 }
 
 /// Maintains separate worklists for each loop in the BasicCoverageBlock CFG, plus one for the
diff --git a/compiler/rustc_mir/src/transform/coverage/mod.rs b/compiler/rustc_mir/src/transform/coverage/mod.rs
index 71c244fdd4a..406a8832d26 100644
--- a/compiler/rustc_mir/src/transform/coverage/mod.rs
+++ b/compiler/rustc_mir/src/transform/coverage/mod.rs
@@ -478,10 +478,10 @@ fn inject_statement(
     let source_info = data.terminator().source_info;
     let statement = Statement {
         source_info,
-        kind: StatementKind::Coverage(box Coverage {
+        kind: StatementKind::Coverage(Box::new(Coverage {
             kind: counter_kind,
             code_region: some_code_region,
-        }),
+        })),
     };
     data.statements.insert(0, statement);
 }
@@ -495,7 +495,7 @@ fn inject_intermediate_expression(mir_body: &mut mir::Body<'tcx>, expression: Co
     let source_info = data.terminator().source_info;
     let statement = Statement {
         source_info,
-        kind: StatementKind::Coverage(box Coverage { kind: expression, code_region: None }),
+        kind: StatementKind::Coverage(Box::new(Coverage { kind: expression, code_region: None })),
     };
     data.statements.push(statement);
 }
diff --git a/compiler/rustc_mir/src/transform/coverage/tests.rs b/compiler/rustc_mir/src/transform/coverage/tests.rs
index e5b3059a599..14dd0a8b924 100644
--- a/compiler/rustc_mir/src/transform/coverage/tests.rs
+++ b/compiler/rustc_mir/src/transform/coverage/tests.rs
@@ -44,11 +44,11 @@ const TEMP_BLOCK: BasicBlock = BasicBlock::MAX;
 
 fn dummy_ty() -> &'static TyS<'static> {
     thread_local! {
-        static DUMMY_TYS: &'static TyS<'static> = Box::leak(box TyS::make_for_test(
+        static DUMMY_TYS: &'static TyS<'static> = Box::leak(Box::new(TyS::make_for_test(
             ty::Bool,
             TypeFlags::empty(),
             DebruijnIndex::from_usize(0),
-        ));
+        )));
     }
 
     &DUMMY_TYS.with(|tys| *tys)