Hi!
I'm trying mapnik (branch v3.0.x) and mapnik-vector-tile (v1.2.2). I build x64 debug configuration for Windows. My test code:

```
mapnik::datasource_cache::instance().register_datasource(mapnik_dir + "/mapnik/input/shape.input");
mapnik::Map m(256, 256);
load_map(m, "style.xml");
m.zoom_all();
mapnik::vector_tile_impl::processor ren(m);
mapnik::vector_tile_impl::merc_tile tile(0, 0, 0, 1024);
ren.update_tile(tile);
```

My simplified mapnik style:

```
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map[]>
<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m [email protected] +wktext +no_defs +over" background-color="#b5d0d0">
<Parameters>
<Parameter name="scale">1</Parameter>
<Parameter name="metatile">2</Parameter>
<Parameter name="name"><![CDATA[OpenStreetMap Carto]]></Parameter>
<Parameter name="description"><![CDATA[A general-purpose OpenStreetMap mapnik style, in CartoCSS]]></Parameter>
<Parameter name="bounds">-180,-85.05112877980659,180,85.05112877980659</Parameter>
<Parameter name="center">0,0,4</Parameter>
<Parameter name="format">png</Parameter>
<Parameter name="minzoom">0</Parameter>
<Parameter name="maxzoom">22</Parameter>
</Parameters>
<Style name="world" filter-mode="first">
<Rule>
<MinScaleDenominator>750000</MinScaleDenominator>
<PolygonSymbolizer fill="#f2efe9" />
</Rule>
</Style>
<Layer name="world"
minimum-scale-denominator="750000"
srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m [email protected] +wktext +no_defs +over">
<StyleName>world</StyleName>
<Datasource>
<Parameter name="file"><![CDATA[Path to\simplified_land_polygons.shp]]></Parameter>
<Parameter name="type"><![CDATA[shape]]></Parameter>
</Datasource>
</Layer>
</Map>
```

I get an error like this? call stack:

```
> test.exe!std::vector<ClipperLib::OutRec * __ptr64,std::allocator<ClipperLib::OutRec * __ptr64> >::operator[](unsigned __int64 _Pos) Line 1237 C++
test.exe!ClipperLib::Clipper::AppendPolygon(ClipperLib::TEdge * e1, ClipperLib::TEdge * e2) Line 2735 C++
test.exe!ClipperLib::Clipper::AddLocalMaxPoly(ClipperLib::TEdge * e1, ClipperLib::TEdge * e2, const mapnik::geometry::point<__int64> & Pt) Line 2267 C++
test.exe!ClipperLib::Clipper::ProcessHorizontal(ClipperLib::TEdge * horzEdge) Line 3103 C++
test.exe!ClipperLib::Clipper::ProcessHorizontals() Line 2881 C++
test.exe!ClipperLib::Clipper::ProcessEdgesAtTopOfScanbeam(const __int64 topY) Line 3434 C++
test.exe!ClipperLib::Clipper::ExecuteInternal() Line 1952 C++
test.exe!ClipperLib::Clipper::Execute(ClipperLib::ClipType clipType, ClipperLib::PolyTree & polytree, ClipperLib::PolyFillType subjFillType, ClipperLib::PolyFillType clipFillType) Line 1907 C++
test.exe!mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor>::operator()(mapnik::geometry::polygon<__int64,mapnik::geometry::rings_container> & geom) Line 292 C++
test.exe!mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> >::operator()(const mapnik::geometry::polygon<double,mapnik::geometry::rings_container> & geom) Line 238 C++
test.exe!mapbox::util::detail::dispatcher<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double>,void,mapnik::geometry::polygon<double,mapnik::geometry::rings_container>,mapnik::geometry::multi_point<double>,mapnik::geometry::multi_line_string<double>,mapnik::geometry::multi_polygon<double>,mapnik::geometry::geometry_collection<double> >::apply_const(const mapnik::geometry::geometry<double> & v, mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f) Line 313 C++
test.exe!mapbox::util::detail::dispatcher<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double>,void,mapnik::geometry::line_string<double>,mapnik::geometry::polygon<double,mapnik::geometry::rings_container>,mapnik::geometry::multi_point<double>,mapnik::geometry::multi_line_string<double>,mapnik::geometry::multi_polygon<double>,mapnik::geometry::geometry_collection<double> >::apply_const(const mapnik::geometry::geometry<double> & v, mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f) Line 319 C++
test.exe!mapbox::util::detail::dispatcher<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double>,void,mapnik::geometry::point<double>,mapnik::geometry::line_string<double>,mapnik::geometry::polygon<double,mapnik::geometry::rings_container>,mapnik::geometry::multi_point<double>,mapnik::geometry::multi_line_string<double>,mapnik::geometry::multi_polygon<double>,mapnik::geometry::geometry_collection<double> >::apply_const(const mapnik::geometry::geometry<double> & v, mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f) Line 319 C++
test.exe!mapbox::util::detail::dispatcher<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double>,void,mapnik::geometry::geometry_empty,mapnik::geometry::point<double>,mapnik::geometry::line_string<double>,mapnik::geometry::polygon<double,mapnik::geometry::rings_container>,mapnik::geometry::multi_point<double>,mapnik::geometry::multi_line_string<double>,mapnik::geometry::multi_polygon<double>,mapnik::geometry::geometry_collection<double> >::apply_const(const mapnik::geometry::geometry<double> & v, mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f) Line 319 C++
test.exe!mapbox::util::variant<mapnik::geometry::geometry_empty,mapnik::geometry::point<double>,mapnik::geometry::line_string<double>,mapnik::geometry::polygon<double,mapnik::geometry::rings_container>,mapnik::geometry::multi_point<double>,mapnik::geometry::multi_line_string<double>,mapnik::geometry::multi_polygon<double>,mapnik::geometry::geometry_collection<double> >::visit<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double>,void>(const mapnik::geometry::geometry<double> & v, mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f) Line 865 C++
test.exe!mapnik::util::apply_visitor<mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & __ptr64,mapnik::geometry::geometry<double> >(mapnik::vector_tile_impl::transform_visitor<mapnik::vector_tile_impl::vector_tile_strategy,mapnik::vector_tile_impl::geometry_clipper<mapnik::vector_tile_impl::geometry_to_feature_pbf_visitor> > & f, const mapnik::geometry::geometry<double> & v) Line 43 C++
test.exe!mapnik::vector_tile_impl::detail::create_geom_layer(mapnik::vector_tile_impl::tile_layer & layer, double simplify_distance, double area_threshold, mapnik::vector_tile_impl::polygon_fill_type fill_type, bool strictly_simple, bool multi_polygon_union, bool process_all_rings) Line 161 C++
test.exe!mapnik::vector_tile_impl::processor::update_tile(mapnik::vector_tile_impl::tile & t, double scale_denom, int offset_x, int offset_y) Line 311 C++
test.exe!main(int argc, char * * argv) Line 43 C++
```

This is a bug or am I doing something wrong?
(ClipperLib is here)
Thanx!