JSON の末尾のカンマ: Go の複合リテラル構文が JSON 解析と競合するのはなぜですか?

<code class="go">// package, imports omitted for brevity

type jsonobject struct {
    Objects []ObjectType `json:"objects"`
}

type ObjectType struct {
    Name string `json:"name"`
}

func main() {
    bytes := []byte(`{ "objects": 
        [ 
            {"name": "foo"}, // REMOVE THE COMMA TO MAKE THE CODE WORK!
        ]}`)
    jsontype := &jsonobject{}
    json.Unmarshal(bytes, &jsontype)
    fmt.Printf("Results: %v\n", jsontype.Objects[0].Name) // panic: runtime error: index out of range
}</code>

<code class="json">{ "objects": 
    [ 
        {"name": "foo"},
]}</code>