go 1.13 刚发布，这个版本改变比较多，一般 go 升级后都会习惯的跟着升级主程序。这次升级后 build 时遇到了 stack check redeclared in this block previous declaration 错误。
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# runtime
/usr/local/go/src/runtime/stubs_x86.go:10:6: stackcheck redeclared in this block
previous declaration at /usr/local/go/src/runtime/stubs_amd64x.go:10:6
/usr/local/go/src/runtime/unaligned1.go:11:6: readUnaligned32 redeclared in this block
previous declaration at /usr/local/go/src/runtime/alg.go:321:40
/usr/local/go/src/runtime/unaligned1.go:15:6: readUnaligned64 redeclared in this block
previous declaration at /usr/local/go/src/runtime/alg.go:329:40
原因是升级时直接覆盖，导致有些丢弃的库报错，解决方法是先删掉旧的 go pkgs ，再解压 go SDK 包
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sudo rm -rf /usr/local/go
sudo tar -C /usr/local -xzf go$VERSION.$OS-$ARCH.tar.gz
目前的 go 最新版
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$ go version
go version go1.13 linux/amd64
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