无法编译 Go 文件 - “初始化失败...xxxx 在此块中重新声明”

Question

我是 Go 的新手，我按照网站上的说明和youtube 视频运行时遇到以下错误go build hello.go：

go: disabling cache (/home/myuser/.cache/go-build) due to initialization failure: open /home/myuser/.cache/go-build/log.txt: permission denied

# runtime

/usr/local/go/src/runtime/map.go:64:2: bucketCntBits redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:64:18

/usr/local/go/src/runtime/map.go:65:2: bucketCnt redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:65:23

/usr/local/go/src/runtime/map.go:69:2: loadFactorNum redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:69:18

/usr/local/go/src/runtime/map.go:70:2: loadFactorDen redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:70:18

/usr/local/go/src/runtime/map.go:76:2: maxKeySize redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:76:17

/usr/local/go/src/runtime/map.go:77:2: maxValueSize redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:77:17

/usr/local/go/src/runtime/map.go:82:2: dataOffset redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:85:4

/usr/local/go/src/runtime/map.go:91:2: empty redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:91:19

/usr/local/go/src/runtime/map.go:92:2: evacuatedEmpty redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:92:19

/usr/local/go/src/runtime/map.go:93:2: evacuatedX redeclared in this block

    previous declaration at /usr/local/go/src/runtime/hashmap.go:93:19

/usr/local/go/src/runtime/map.go:93:2: too many errors

它写道permission denied，但我试图运行它sudo go build，但它也失败了：

sudo: go: 命令未找到

我正在使用 Ubuntu 16.4。我的 go 文件hello.go在$HOME/Desktop/go/src/hello.

我的文件$HOME/myuser/.profile包含：

PATH="$HOME/bin:$HOME/.local/bin:$PATH:/usr/local/go/bin"