想把自定义的目录加到 GOROOT里
自以为是 用分号隔开 配置多个  
go env -w GOROOT="/usr/local/go;/path/project"
linux 多个应该用 冒号 分隔

结果运行报错
go run main.go
go: cannot find GOROOT directory: /usr/local/go;/path/project


export GOROOT=/usr/local/go
echo $GOROOT
/usr/local/go
go run main.go
Don't panic.

go env -w GOROOT="/usr/local/go"

go env