较新版本的GCC引发无效的转换错误

Question

    class FixedDataBlock: public DataBlockHeaderCommon<BlockSize>
    {
    // Construction
    public:
        FixedDataBlock(void* pool, SizeT const entrySize, SizeT const alignment)
            : base_t(eBlkFixData, pool)
        {
            this_t* dummy = reinterpret_cast<this_t*>(0);
            // offsets is a type of uint16_t
            OffsetT dataStartBlockOffset = reinterpret_cast<OffsetT>( &dummy->data[0] );

        }

    // Member variables
    private:
        int8_t      data[ BlockSize-sizeof(header_t) ];
    };

错误：无效的类型转换：将“ int8_t = {signed char} *”转换为“ uint16_t = {unsigned short}”

OffsetT dataStartBlockOffset = reinterpret_cast（＆dummy-> data [0]）;

// dummy-> data [0]被签名为char *，而dataStartBlockOffset为未签名的短符号

上面的代码在Windows上编译正常，但仅在GCC上失败。