UnsafeMutablePointer사용중 이슈발생

MARKANY(7832,0x1fd3fb5c0) malloc: double free for ptr 0x13181bc00

MARKANY(7832,0x1fd3fb5c0) malloc: *** set a breakpoint in malloc_error_break to debug

func getData(from stream:InputStream)->NSMutableData{
        let maxSize = 1024
        let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: maxSize)
        let resultData = NSMutableData()
        while stream.hasBytesAvailable{
            let numberOfBytesRead = stream.read(buffer, maxLength: maxSize)
            resultData.append(buffer, length: numberOfBytesRead)
            if numberOfBytesRead<0 {
                print("ERROR")
                break
            }
            let info = String(bytesNoCopy: buffer, length: numberOfBytesRead, encoding: .utf8, freeWhenDone: true)
            log.debug(info ?? "INFO = nil")
        }
        defer{
            buffer.deinitialize(count: maxSize)
            buffer.deallocate()
        }
        return resultData
    }

let info = String(bytesNoCopy: buffer, length: numberOfBytesRead, encoding: .utf8, freeWhenDone: true) 에서 buffer의 메모리를 프리하기 때문에 나타난 이슈였음.