Repository: microsoft/garnet
File: libs/server/Storage/Session/ObjectStore/Common.cs (C#)

Code before:
                    output.SpanByteAndMemory.Memory.Dispose();
            }

            return result;
        }

        /// <summary>
        /// Converts a single token in RESP format to ArgSlice type
        /// </summary>
        /// <param name="output">The RESP format output object</param>
        /// <returns></returns>
        unsafe ArgSlice ProcessRespSingleTokenOutput(GarnetObjectStoreOutput output)
        {
            byte* element = null;
            var len = 0;
            ArgSlice result;

            var outputSpan = output.SpanByteAndMemory.IsSpanByte ?
                             output.SpanByteAndMemory.SpanByte.AsReadOnlySpan() : output.SpanByteAndMemory.AsMemoryReadOnlySpan();
            try
            {
                fixed (byte* outputPtr = outputSpan)
                {
                    var refPtr = outputPtr;

                    if (!RespReadUtils.TryReadPtrWithSignedLengthHeader(ref element, ref len, ref refPtr,
                            outputPtr + outputSpan.Length))
                        return default;
                    result = new ArgSlice(element, len);
                }
            }
            finally
            {
                if (!output.SpanByteAndMemory.IsSpanByte)
                    output.SpanByteAndMemory.Memory.Dispose();
            }

            return result;
        }

        /// <summary>
        /// Converts a simple integer in RESP format to integer type
        /// </summary>
        /// <param name="output">The RESP format output object</param>
        /// <param name="value"></param>
        /// <returns>integer</returns>
        unsafe bool TryProcessRespSimple64IntOutput(GarnetObjectStoreOutput output, out long value)
        {
            var outputSpan = output.SpanByteAndMemory.IsSpanByte ?
                output.SpanByteAndMemory.SpanByte.AsReadOnlySpan() : output.SpanByteAndMemory.AsMemoryReadOnlySpan();
            try

Review comment (suggestion):
This will return true if we're parsing a null value, and len will be -1. We shouldn't return an ArgSlice with a negative length, we should return a default in that case.

Code after:
                    output.SpanByteAndMemory.Memory.Dispose();
            }

            return result;
        }

        /// <summary>
        /// Converts a single token in RESP format to ArgSlice type
        /// </summary>
        /// <param name="output">The RESP format output object</param>
        /// <returns></returns>
        unsafe ArgSlice ProcessRespSingleTokenOutput(GarnetObjectStoreOutput output)
        {
            byte* element = null;
            var len = 0;
            ArgSlice result;

            var outputSpan = output.SpanByteAndMemory.IsSpanByte ?
                             output.SpanByteAndMemory.SpanByte.AsReadOnlySpan() : output.SpanByteAndMemory.AsMemoryReadOnlySpan();
            try
            {
                fixed (byte* outputPtr = outputSpan)
                {
                    var refPtr = outputPtr;

                    if (!RespReadUtils.TryReadPtrWithSignedLengthHeader(ref element, ref len, ref refPtr,
                            outputPtr + outputSpan.Length) || len < 0)
                        return default;

                    result = new ArgSlice(element, len);
                }
            }
            finally
            {
                if (!output.SpanByteAndMemory.IsSpanByte)
                    output.SpanByteAndMemory.Memory.Dispose();
            }

            return result;
        }

        /// <summary>
        /// Converts a simple integer in RESP format to integer type
        /// </summary>
        /// <param name="output">The RESP format output object</param>
        /// <param name="value"></param>
        /// <returns>integer</returns>
        unsafe bool TryProcessRespSimple64IntOutput(GarnetObjectStoreOutput output, out long value)
        {
            var outputSpan = output.SpanByteAndMemory.IsSpanByte ?
                output.SpanByteAndMemory.SpanByte.AsReadOnlySpan() : output.SpanByteAndMemory.AsMemoryReadOnlySpan();