Oh yes, thank you. I totally missed that, thinking the bytes.Buffer was 
preallocated with 4 bytes, instead i filled it with 4x0 bytes

Le mardi 10 octobre 2017 10:59:56 UTC+2, Ian Davis a écrit :
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> On Tue, 10 Oct 2017, at 09:51 AM, aurelien...@gmail.com <javascript:> 
> wrote:
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>
> func main() {
> buf := bytes.NewBuffer(make([]byte, 4))
> buf.WriteString("1234")
>
>
> These two lines result in a string with 4 null bytes followed by 1234. 
> Just use buf := &bytes.Buffer{}
>
> Ian
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