双击错误之后定位到如图所示，请问是怎么回事啊?

Question

Answer 1

GWLOEZPMVEABXNJTDSIKTVCSCYBDNJYBLFHJGPLOLAQTYGDTILUDMPFUZVUFLXZSOSYUWAPFBXTJZWSBKMCEHDTJNJLBRBEROXAHWJTZTSLYYBSVVFLIEBXHFFBBEMSYHKKHEENUDDGJSKKIDWZCCFCFPQRJZPCFYUBUHVSKCWJKWWWFMSDWZJJMOCBVUNFBHVXXNDMFZZSVCEOXXTJDJMTMPZSMHHEHYCMQFVVAROFSFLOHNUIFOYPCKKGQGIOKKQDRKNNOPUAOOJTIJMCZSUOXKQQANDYEEVOXDDXNQNEJJGFCVLLHRQJKGADZJJMCYXHABQWMQCFUQNWWGRKAUBAZJCZGMSMVJZLLEOORBKAUVEFPVVRLLRBEYHHRJWMMVIVKEKDBHRRXAQVAZJPTDGLZIEOKEEHXKXXDZQRKPFYYXHGCMPFSPXENGVUKEEPQQGMXDHFVBEEERDPOEUKTGJDWWXQZZCCLQWGWCODDTXNUEEEVKMVFSBEYHXYTJDOEUGMMPNQIHGGRROBELBMGPZCCSCIDCISYIXLLVEPLURLJZSCLLTZYYYAVYIYRZTVYLULPPPMJCFSZIIYKBIUDEOFFIZLLIFVYHBRABYRLLKDIBUBOHLUKACTJHATTDNXTCPZPZVLUTPOLVOPVRRXGDWVLBRXUXHEJBBRHDDLRFVWSRYOXXNUKKUTNZDKNRKKESCHBKJDGTTBCFYOEXHHKUNGACJMFLVSBDPIROYHUKXBASLVVLVUEYZQAKLUEKNKTTDQFIYVFBXNQTNVKEATMMMPZCZVNAUKHNXAVLFYISDMWPMLHDZCLBKGWMPYUDTCGIFCSGVXGJSCLHWZUDYBEHQFVLBAWRHXNWMILOMBXNPMILHKG

Answer 2

字面意思是，字符串类型不能为空值，所以你可以试试给个值看看还报不报错。