https://golang.org/cl/111416 made vet spot this new issue by recognizing the len() call as side-effect free: redundant or: md.IsSymmetricallyEncrypted || md.IsSymmetricallyEncrypted Change-Id: I8b72eedb458365a50e14d5eec35b972ee61efb1f Reviewed-on: https://go-review.googlesource.com/112255 Run-TryBot: Filippo Valsorda <filippo@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Andrew Bonventre <andybons@golang.org>