raspberrypi 上go1.7.4 在“go get github.com/.../leaf”语句处报websocket错误：trace.TLSHandshakeStart undefined (type *httptrace.ClientTrace has no field or method TLSHandshakeStart)

[windskyl]

raspberrypi 上用“sudo apt-get install go”语句安装默认go1.7.4
go env为：

在此处报错：