From 24290efafffb83514da4e37f5f42a962d0e9bb1f Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Fri, 27 Sep 2024 11:59:35 -0400
Subject: [PATCH] Mark some more smart pointers as insignificant

---
 library/alloc/src/boxed.rs | 1 +
 library/alloc/src/sync.rs  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index 6421504b89640..5f20729568352 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -228,6 +228,7 @@ mod thin;
 #[lang = "owned_box"]
 #[fundamental]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_insignificant_dtor]
 // The declaration of the `Box` struct must be kept in sync with the
 // compiler or ICEs will happen.
 pub struct Box<
diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index ced789c4f9248..5d099a49854af 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -237,6 +237,7 @@ macro_rules! acquire {
 /// [rc_examples]: crate::rc#examples
 #[cfg_attr(not(test), rustc_diagnostic_item = "Arc")]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_insignificant_dtor]
 pub struct Arc<
     T: ?Sized,
     #[unstable(feature = "allocator_api", issue = "32838")] A: Allocator = Global,