Ensure that NSCharacterSet always returns an NSObject on copy #5120

parkera merged 1 commit intoswiftlang:release/6.0swiftlang/swift-corelibs-foundation:release/6.0from

parkera:parkera/characterset_leak_followup_60parkera/swift-corelibs-foundation:parkera/characterset_leak_followup_60Copy head branch name to clipboard