verifying github.com/gorilla/websocket@v1.4.1/go.mod: github.com/gorilla/websocket@v1.4.1/go.mod: Get https://sum.golang.org/lookup/gi
thub.com/gorilla/websocket@v1.4.1: dial tcp 172.217.24.17:443: connectex: A connection attempt failed because the connected party did
not properly respond after a period of time, or established connection failed because connected host has failed to respond.
换源之后还不行,go get -u -v github.com/go-delve/delve/cmd/dlv
原因是1.13之后设置了默认的GOSUMDB=sum.golang.org,由于墙的原因无法访问,执行以下命令关闭即可:

go env -w GOSUMDB=off
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