diff --git a/stdlib/public/core/ContiguousArrayBuffer.swift b/stdlib/public/core/ContiguousArrayBuffer.swift
index 4f5daa3461f39..ab4ac715a80ef 100644
--- a/stdlib/public/core/ContiguousArrayBuffer.swift
+++ b/stdlib/public/core/ContiguousArrayBuffer.swift
@@ -141,6 +141,7 @@ internal final class _ContiguousArrayStorage<
 
 #if _runtime(_ObjC)
   
+  @_effects(releasenone)
   internal final override func withUnsafeBufferOfObjects<R>(
     _ body: (UnsafeBufferPointer<AnyObject>) throws -> R
   ) rethrows -> R {
diff --git a/stdlib/public/core/SwiftNativeNSArray.swift b/stdlib/public/core/SwiftNativeNSArray.swift
index ffbc557cda7ce..13d097c31f209 100644
--- a/stdlib/public/core/SwiftNativeNSArray.swift
+++ b/stdlib/public/core/SwiftNativeNSArray.swift
@@ -53,6 +53,7 @@ internal class __SwiftNativeNSArrayWithContiguousStorage
   deinit {}
 
   // Operate on our contiguous storage
+  @_effects(releasenone)
   internal func withUnsafeBufferOfObjects<R>(
     _ body: (UnsafeBufferPointer<AnyObject>) throws -> R
   ) rethrows -> R {
@@ -379,6 +380,7 @@ extension __SwiftNativeNSArrayWithContiguousStorage {
     _destroyBridgedStorage(_heapBufferBridged)
   }
 
+  @_effects(releasenone)
   internal override func withUnsafeBufferOfObjects<R>(
     _ body: (UnsafeBufferPointer<AnyObject>) throws -> R
   ) rethrows -> R {
@@ -438,7 +440,8 @@ extension __SwiftNativeNSArrayWithContiguousStorage {
 internal final class __SwiftDeferredStaticNSArray<Element>
   : __SwiftDeferredNSArray {
 
-  internal override func withUnsafeBufferOfObjects<R>(
+  @_effects(releasenone)
+  final internal override func withUnsafeBufferOfObjects<R>(
     _ body: (UnsafeBufferPointer<AnyObject>) throws -> R
   ) rethrows -> R {
     while true {
@@ -526,6 +529,7 @@ internal class __ContiguousArrayStorageBase
   }
   
 #if _runtime(_ObjC)
+  @_effects(releasenone)
   internal override func withUnsafeBufferOfObjects<R>(
     _ body: (UnsafeBufferPointer<AnyObject>) throws -> R
   ) rethrows -> R {