Add missing #[cfg(not(no_global_oom_handling))]

Author: Jules-Bertholet

library/alloc/src/boxed/thin.rs

@@ -431,6 +431,7 @@ impl<T: ?Sized + Error> Error for ThinBox<T> {
     }
 }
 
+#[cfg(not(no_global_oom_handling))]
 #[unstable(feature = "thin_box", issue = "92791")]
 impl<T> From<T> for ThinBox<T> {
     #[inline(always)]

library/alloc/src/rc.rs

@@ -3816,6 +3816,7 @@ impl<T: ?Sized, A: Allocator> AsMut<T> for UniqueRc<T, A> {
 #[unstable(feature = "unique_rc_arc", issue = "112566")]
 impl<T: ?Sized, A: Allocator> Unpin for UniqueRc<T, A> {}
 
+#[cfg(not(no_global_oom_handling))]
 #[unstable(feature = "unique_rc_arc", issue = "112566")]
 impl<T> From<T> for UniqueRc<T> {
     #[inline(always)]

library/alloc/src/sync.rs

@@ -4242,6 +4242,7 @@ impl<T: ?Sized, A: Allocator> AsMut<T> for UniqueArc<T, A> {
     }
 }
 
+#[cfg(not(no_global_oom_handling))]
 #[unstable(feature = "unique_rc_arc", issue = "112566")]
 impl<T> From<T> for UniqueArc<T> {
     #[inline(always)]