从 Go 1.13 升级后使用 Go 1.14 构建时，是什么导致了关于“先前声明”

Question

将我的go安装文件夹升级到Go 1.14sudo tar -C /usr/local -xzf go1.14.linux-amd64.tar.gz每次我尝试构建程序时都会收到运行时错误：~/playground/go/src/hello  go build hello# runtime/internal/atomic/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:18:6: Load redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:16:24/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:24:6: Loadp redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:22:32/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:30:6: Load64 redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:28:26/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:36:6: LoadAcq redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:34:27/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:41:6: Xadd redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:39:37/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:44:6: Xadd64 redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:42:39/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:47:6: Xadduintptr redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:45:47/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:50:6: Xchg redeclared in this block    previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:48:36我试图降级到版本1.13.8并且build一切run正常。sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.13.8.linux-amd64.tar.gz~  go versiongo version go1.13.8 linux/amd64~/go  go build hello && go run hellohello, world我的操作系统是 Linux Mint 19.2。

Answer 1

当目标目录已用于较旧的Go安装并且某些文件已被重命名（与以前的版本相比）时，此错误是可重现的并且会发生。

例如：

Go 1.13.8中的文件go/src/runtime/internal/atomic/atomic_amd64x.go已移至Go 1.14go/src/runtime/internal/atomic/atomic_amd64.go中。

在不清理目标目录的情况下提取会触发“先前声明”错误，因为func Xchguintptr在go/src/runtime/internal/atomic/atomic_amd64x.go和go/src/runtime/internal/atomic/atomic_amd64.go

为避免此类错误，请删除安装文件夹 ( /usr/local/go ) 并重新安装Go 1.14。

sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.14.linux-amd64.tar.gz

再次测试：

~/go/src/hello  go version

go version go1.14 linux/amd64

~/go/src/hello  go build hello && go run hello

hello, world