go tool: no such tool "6a" using btcutil.DecodeAddr

[Dan Dubois]

I get the error message 'go tool: no such tool "6a"' when I try to use btcutil.DecodeAddr within an App Engine unit test. Any ideas why?

I am using go_appengine_sdk_darwin_amd64-1.9.0 and the following is an example of the code that won't compile or test using goapp -test.run="TestDecodeAddr"

func TestDecodeAddr(t *testing.T) {        

        _, err := btcutil.DecodeAddr("testaddr")

        if err != nil {

                t.Fatal(err)

        }

}

[David Symonds]

6a is the assembler, which shouldn't be involved unless a package has
assembly. I would guess that one of your app's dependencies has a .s
file, which is not permitted on App Engine.

[Dan Dubois]

Thanks for the quick response. Some assembly is being invoked. :-(

[Dan Dubois]

Just for information, the github.com/conformal/btcutil package depends on github.com/conformal/fastsha256 which has some assembly for amd64 architecture. I was able to remove the +build !amd64 instruction from the go code and it all worked.