YAML Anchor, reference fails with simple example

[cowtowncoder]

So, although there are cases where Anchor/Reference pairs work via Jackson @JsonIdentityInfo, looks like even simple cases sometimes fail.
For example

    static class ScratchModel {
        public StringHolder foo;
        public StringHolder boo;
    }

    @JsonIdentityInfo(generator = ObjectIdGenerators.None.class)
    static class StringHolder {
        public String value;

        @Override
        public String toString() {
            return value;
        }
    }

    public void testObjectIdUsingNative() throws Exception
    {
        final String YAML_CONTENT =
                "foo: &foo1\n" +
                "  value: bar\n" +
                "boo: *foo1\n";
        ScratchModel result = MAPPER.readValue(YAML_CONTENT, ScratchModel.class);
        assertNotNull(result);
    }

fails with

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `com.fasterxml.jackson.dataformat.yaml.failing.ObjectId63Test$StringHolder` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('foo1')
 at [Source: (StringReader); line: 3, column: 6] (through reference chain: com.fasterxml.jackson.dataformat.yaml.failing.ObjectId63Test$ScratchModel["boo"])
...

[cowtowncoder]

It's odd this does not work, considering there is a basic test for native object ids (anchors), references working. Need to figure out what is the difference...

[cowtowncoder]

Ok, interesting. It looks like aggressive clearing of anchor value in YAMLParser.nextToken() causes the problem somehow.

I think what basically happens is that there are 2 potential YAML locations -- before logical start of Object, and for the first key/value pair -- that sort of conflict in that only second will be retained. So need to figure out how to retain first value.