Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (go version)?
go v1.7.1 linux/amd64
What operating system and processor architecture are you using (go env)?
debian sid, linux amd/64
What did you do?
https://play.golang.org/p/GJ8Iru85xd
What did you expect to see?
That fmt cannot be imported multiple times.
What did you see instead?
I was able to import the same package again under an alias...personally this strikes me as wrong.