Fix AtomicBox deinit issue (#266)

Author: Kyle-Ye

Sources/OpenSwiftUICore/Util/ThreadUtils.swift

@@ -95,6 +95,12 @@ private final class AtomicBuffer<Value>: ManagedBuffer<os_unfair_lock_s, Value>
         }
         return unsafeDowncast(buffer, to: AtomicBuffer<Value>.self)
     }
+
+    deinit {
+        withUnsafeMutablePointerToElements { pointer in
+            _ = pointer.deinitialize(count: 1)
+        }
+    }
 }
 #else
 private final class AtomicBuffer<Value>: ManagedBuffer<NSLock, Value> {
@@ -107,6 +113,12 @@ private final class AtomicBuffer<Value>: ManagedBuffer<NSLock, Value> {
         }
         return unsafeDowncast(buffer, to: AtomicBuffer<Value>.self)
     }
+
+    deinit {
+        withUnsafeMutablePointerToElements { pointer in
+            _ = pointer.deinitialize(count: 1)
+        }
+    }
 }
 #endif
 

Tests/OpenSwiftUICoreTests/Util/ThreadUtilsTests.swift

@@ -55,4 +55,27 @@ struct AtomicBoxTests {
         @AtomicBox var box: Int = 3
         #expect($box.access { $0.description } == "3")
     }
+
+    @Test
+    func deinitCheck() async throws {
+        final class DeinitCheck {
+            let confirmation: Confirmation
+
+            init(confirmation: Confirmation) {
+                self.confirmation = confirmation
+            }
+
+            deinit {
+                confirmation()
+            }
+        }
+
+        func deinitCheck(_ confirmation: Confirmation) {
+            @AtomicBox var check = DeinitCheck(confirmation: confirmation)
+        }
+
+        await confirmation { confirmation in
+            deinitCheck(confirmation)
+        }
+    }
 }