What version of Go are you using (go version)?

go version go1.8.3 darwin/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/Overcyn/Workspace/go/"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/c3/8xb38pfj2kvg1c87nfdq8h140000gn/T/go-build823422639=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

What did you do?

package main

import (
	"fmt"
	"golang.org/x/text/unicode/norm"
)

func main() {
	in := []byte("test")
	fmt.Println("Init()", in)

	var it norm.Iter
	it.Init(norm.NFD, in)
	for !it.Done() {
		fmt.Println(it.Next(), it.Pos())
	}

	fmt.Println("InitString()", string(in))

	var it2 norm.Iter
	it2.InitString(norm.NFD, string(in))
	for !it2.Done() {
		fmt.Println(it2.Next(), it2.Pos())
	}
}

What did you expect to see?

I expect that Iter to iterate over the entire byte slice.

What did you see instead?

The last slice returned by Iter.Next is empty. Iter.InitString returns the expected values.

Init() [116 101 115 116]
[116] 1
[101] 2
[115] 3
[] 4
InitString() test
[116] 1
[101] 2
[115] 3
[116] 4