➜ test go run hello.go
# runtime/internal/atomic
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:13:6: Load redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:16:24
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:19:6: Loadp redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:22:32
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:25:6: Load64 redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:28:26
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:31:6: LoadAcq redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:34:27
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:36:6: Xadd redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:39:37
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:39:6: Xadd64 redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:42:39
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:42:6: Xadduintptr redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:45:47
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:45:6: Xchg redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:48:36
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:48:6: Xchg64 redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:51:38
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:51:6: Xchguintptr redeclared in this block
previous declaration at /usr/local/go/src/runtime/internal/atomic/atomic_amd64.go:54:45
/usr/local/go/src/runtime/internal/atomic/atomic_amd64x.go:51:6: too many errors