FeatureImage rendering incorrectly with features that cross the dateline

[jasonbeverage]

We noticed large polygons at low zoom levels when rendering the osm-oceans layer, which you can reproduce with this

<FeatureImage name="Water"
        features="data:osm-oceans">
        <styles>
            <style type="text/css">
                default {
                   fill: #ffbf6f;
                }
            </style>
        </styles>
    </FeatureImage>

<XYZFeatures name="data:osm-oceans">
        <url>http://readymap.org/readymap/mbtiles/osm-oceans/{z}/{x}/{-y}.pbf</url>
        <min_level>0</min_level>
        <max_level>9</max_level>
        <profile>spherical-mercator</profile>
        <format>pbf</format>
    </XYZFeatures>

I've isolated one of the bad features which crosses the dateline and it's in this shapefile badmercator.zip which can be rendered like this

<FeatureImage name="Water">
	    <OGRFeatures url="badmercator.shp"/>
        <styles>
            <style type="text/css">
                default {
                   fill: #ffbf6f;
                }
            </style>
        </styles>
    </FeatureImage>

The features probably need to be split across the dateline before rendering but where that needs to happen in the pipeline needs to be assessed.