Golang cannot be compiled, prompt cannot find package "."

golang can not be compiled and run, so it can, but suddenly it doesn"t work. I don"t know why and how to solve it?
error prompt is shown in figure

D:\CY\OneDrive\testgopath:

Mar.05,2021

well, after asking around, I finally got an answer from a big god in some group. This is the bug, of golang. For more information, please see https://github.com/golang/go/.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf6ec3-54c93.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf6ec3-54c93.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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