It seems like you are not pulling in the correct version of dependencies.

We need detailed repro steps to investigate this. How are you exactly getting the dependency ? Are you running in module mode ? Are there other dependencies ?

If possible kindly create a test repo with exact steps so that we can clone and get this error. Thank you.

I am running in module mode, when I use other dependence, it can build. When I only use this websocket dependence, it can't build.

Sorry, perhaps I wasn't clear. Without the code it is very difficult for us to debug and understand what is going on. Please give the sample code (or create a repo with it), and mention the exact steps to get your error.

Got similar error, but cannot provide more info, as it is an internal product (even have to censor some stuff out, sorry...):

# foo/bar/baz.test
foo/bar/baz.Test_Something: relocation target go.builtin.error.Error not defined
foo/bar/baz.Test_Something_Else: relocation target go.builtin.error.Error not defined

This was in a GO111MODULE=on go test -mod=vendor in go1.11.3.

For now I'm reporting after first noticed occurrence of this. Don't know yet if it'll repeat when running tests again. Will add if I know something more.

edit 1: As for now, the error reproduces on every go test call on this package. Interestingly, there are other test funcs in the same package which don't result in this error.

edit 2: Ok, in my case got a repro, reporting on #29304 as I'm not so sure now if it's the same issue.

Timed out in state WaitingForInfo. Closing.

(I am just a bot, though. Please speak up if this is a mistake or you have the requested information.)