Change-Id: I853da2666ed2b5f8b80bd9438f8c352f233b9c89
Reviewed-on: https://go-review.googlesource.com/33800
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
<p> <!-- CL 30944 -->
In previous versions of Go, unmarshaling a JSON <code>null</code> into an
- of <a href="/pkg/encoding/json/#Unmarshaler"><code>Unmarshaler</code></a>
+ <a href="/pkg/encoding/json/#Unmarshaler"><code>Unmarshaler</code></a>
was considered a no-op; now the <code>Unmarshaler</code>'s
<code>UnmarshalJSON</code> method is called with the JSON literal
<code>null</code> and can define the semantics of that case.