From 62856006ab67c4c1c09fd968d2bcea56c64b1a68 Mon Sep 17 00:00:00 2001
From: Jules Bertholet <julesbertholet@quoi.xyz>
Date: Thu, 13 Aug 2026 22:57:38 -0400
Subject: [PATCH 1/2] Impl `Debug` for `SendSyncNonNull` regardless of pointee

---
 src/send_sync_non_null.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/send_sync_non_null.rs b/src/send_sync_non_null.rs
index 57a4ea68e..64c1c3eee 100644
--- a/src/send_sync_non_null.rs
+++ b/src/send_sync_non_null.rs
@@ -1,3 +1,4 @@
+use std::fmt;
 use std::ptr::NonNull;
 
 /// A [`NonNull`] that is [`Send`]` + `[`Sync`].
@@ -17,7 +18,6 @@ use std::ptr::NonNull;
 ///
 /// though these are `unsafe` due to the raw pointers
 /// and potential [`Self::cast`] called in between.
-#[derive(Debug)]
 #[repr(transparent)]
 pub struct SendSyncNonNull<T: ?Sized>(NonNull<T>);
 
@@ -90,3 +90,10 @@ impl<T: ?Sized + Send + Sync> SendSyncNonNull<T> {
         unsafe { Box::from_raw(ptr) }
     }
 }
+
+impl<T: ?Sized> fmt::Debug for SendSyncNonNull<T> {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.0, f)
+    }
+}

From b0e99b569e3d65d100f174a065102fe9780fa27b Mon Sep 17 00:00:00 2001
From: Jules Bertholet <julesbertholet@quoi.xyz>
Date: Sat, 19 Sep 2026 10:52:36 -0400
Subject: [PATCH 2/2] Add comment explaining why no `derive`

---
 src/send_sync_non_null.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/send_sync_non_null.rs b/src/send_sync_non_null.rs
index 64c1c3eee..8f193bd2c 100644
--- a/src/send_sync_non_null.rs
+++ b/src/send_sync_non_null.rs
@@ -91,6 +91,7 @@ impl<T: ?Sized + Send + Sync> SendSyncNonNull<T> {
     }
 }
 
+// Don't `derive` in order to avoid `T: Debug` bound
 impl<T: ?Sized> fmt::Debug for SendSyncNonNull<T> {
     #[inline]
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {