[gdal-dev] Crash in GEOS iterating through the layers in a PBF-file loaded with the MVT driver in GDAL 3.12.4#2

[dg0yt at darc.de]

FTR an update to the vcpkg port is waiting in https://github.com/microsoft/vcpkg/pull/51627.
But it needs an update or patch to VTK, and this isn't trivial (At least not as long as I did not replace my broken desktop PC.)

Regards,
Kai


> On 06/08/2026 1:16 PM CEST Roman Plöhn via gdal-dev <gdal-dev at lists.osgeo.org> wrote:
> 
> 
> Hello,
> 
> 
> in our company we since many years use GDAL (for building C++ software for Windows only) from VCPKG.
> 
> 
> The GDAL version used in the most recent VCPKG is 3.12.4#2, in which I encounter a reproducable crash in RELEASE builds when opening a file downloaded from a Map-Tiles server, as soon as I iterate through its layers.
> 
> 
> My main question about this problem is if this problem is already fixed in a more recent GDAL version ... if so I could send the VCPKG-maintainers a feature request to ask them to update the GDAL package in there to a version, where it doesn't crash anymore.
> 
> 
> Below is a description of the problem. If needed I can send the file in question.
> 
> 
> For us this is a serioes issue, because it hinders us from using a recent version of VCPKG at all (we even use the dependend lib mapnik, which needs GDAL).
> 
> 
> I really hope someone can help me ...
> 
> 
> Best regards,
> 
> 
> have a nice day,
> 
> 
> Roman
> 
> 
> 
> 
> 
> 
> 
> 
> The function I use to reproduce the crash is quite simpel:
> 
> 
> auto GetLayerFeaureFIDs( OGRLayer& layer ) -> std::vector< GIntBig >
> {
> std::cout << "Processing layer '" << layer.GetName() << "'...\n";
>  
> 
> std::vector< GIntBig > fids;
> 
> 
> OGRFeature* feature = layer.GetNextFeature();
> 
> 
> for ( ; feature != nullptr; feature = layer.GetNextFeature() )
> {
> if ( nullptr == feature )
> {
> std::cout << "Got a null feature from layer '" << layer.GetName() << "'. Skipping it.\n";
> continue;
> }
> 
> 
> fids.push_back( feature->GetFID() );
> }
> 
> 
> return fids;
> }
> 
> 
> It doesn't happen for each layer, i.e. in my DEBUG build, where no crash happens, an error is reported about a thrown TopologyException:
> 
> 
> Debug: GDAL: GDALOpen(C:\Projects\TestGdal\x64\Debug\43.pbf, this=000001D7A8789410) succeeds as MVT. (code: 0)
> Processing layer 'boundary'...
> Processing layer 'landcover'...
> Failure: TopologyException: side location conflict at 3934.7142857142858 3859.8571428571427. This can occur if the input geometry is invalid. (code: 1)
> Processing layer 'landuse'...
> Failure: TopologyException: side location conflict at 494.19230769230768 2796.5769230769229. This can occur if the input geometry is invalid. (code: 1)
> ...
> 
> 
> The crash is a Access Violation, the top of the call-stack looks like this:
> 
> 
> [Inline Frame] geos.dll!geos::geom::CoordinateXY::equals2D(const geos::geom::CoordinateXY &) Line 106 C++
> [Inline Frame] geos.dll!geos::index::kdtree::KdTree::queryNodePoint(geos::index::kdtree::KdNode * currentNode, const geos::geom::Coordinate & odd, bool) Line 235 C++
> geos.dll!geos::index::kdtree::KdTree::query(const geos::geom::Coordinate & queryPt) Line 289 C++
> [Inline Frame] geos.dll!geos::noding::snapround::HotPixelIndex::find(const geos::geom::Coordinate &) Line 146 C++
> geos.dll!geos::noding::snapround::HotPixelIndex::addRounded(const geos::geom::CoordinateXYZM & pRound) Line 48 C++
> [Inline Frame] geos.dll!geos::noding::snapround::HotPixelIndex::add(const geos::geom::CoordinateXYZM &) Line 90 C++
> [Inline Frame] geos.dll!geos::noding::snapround::HotPixelIndex::addNodes::__l2::<lambda_8c47a75e4bac7a256ab75080e3e5d5f0>::operator()(const geos::geom::CoordinateXYZM &) Line 127 C++
> geos.dll!geos::geom::CoordinateSequence::forEach<<lambda_8c47a75e4bac7a256ab75080e3e5d5f0>>(geos::noding::snapround::HotPixelIndex::addNodes::__l2::<lambda_8c47a75e4bac7a256ab75080e3e5d5f0> && fun) Line 701 C++
> geos.dll!geos::noding::snapround::HotPixelIndex::addNodes(const geos::geom::CoordinateSequence * pts) Line 130 C++
> geos.dll!geos::noding::snapround::SnapRoundingNoder::addIntersectionPixels(std::vector<geos::noding::SegmentString *,std::allocator<geos::noding::SegmentString *>> & segStrings) Line 85 C++
> geos.dll!geos::noding::snapround::SnapRoundingNoder::snapRound(std::vector<geos::noding::SegmentString *,std::allocator<geos::noding::SegmentString *>> & inputSegStrings, std::vector<geos::noding::SegmentString *,std::allocator<geos::noding::SegmentString *>> & resultNodedSegments) Line 70 C++
> geos.dll!geos::operation::overlayng::EdgeNodingBuilder::node(std::vector<geos::noding::SegmentString *,std::allocator<geos::noding::SegmentString *>> * segStrings) Line 122 C++
> geos.dll!geos::operation::overlayng::EdgeNodingBuilder::build(const geos::geom::Geometry * geom0, const geos::geom::Geometry * geom1) Line 104 C++
> geos.dll!geos::operation::overlayng::OverlayNG::computeEdgeOverlay() Line 227 C++
> geos.dll!geos::operation::overlayng::OverlayNG::getResult() Line 195 C++
> geos.dll!geos::operation::overlayng::OverlayNG::overlay(const geos::geom::Geometry * geom0, const geos::geom::Geometry * geom1, int opCode, const geos::geom::PrecisionModel * pm) Line 100 C++
> geos.dll!geos::operation::overlayng::OverlayNGRobust::overlaySR(const geos::geom::Geometry * geom0, const geos::geom::Geometry * geom1, int opCode) Line 295 C++
> geos.dll!geos::operation::overlayng::OverlayNGRobust::Overlay(const geos::geom::Geometry * geom0, const geos::geom::Geometry * geom1, int opCode) Line 147 C++
> geos.dll!geos::geom::HeuristicOverlay(const geos::geom::Geometry * g0, const geos::geom::Geometry * g1, int opCode) Line 194 C++
> geos.dll!geos::geom::Geometry::intersection(const geos::geom::Geometry * other) Line 616 C++
> [Inline Frame] geos_c.dll!GEOSIntersection_r::__l2::<lambda_3988e1633fcf92bee6886158a6950fe9>::operator()() Line 1322 C++
> geos_c.dll!execute<`anonymous namespace'::InterruptManager,<lambda_3988e1633fcf92bee6886158a6950fe9>,0>(GEOSContextHandle_HS * extHandle, GEOSIntersection_r::__l2::<lambda_3988e1633fcf92bee6886158a6950fe9> && f) Line 521 C++
> geos_c.dll!GEOSIntersection_r(GEOSContextHandle_HS * extHandle, const geos::geom::Geometry * g1, const geos::geom::Geometry * g2) Line 1326 C++
> gdal.dll!BuildGeometryFromTwoGeoms(const OGRGeometry * poSelf, const OGRGeometry * poOtherGeom, GEOSGeom_t *(*)(GEOSContextHandle_HS *, const GEOSGeom_t *, const GEOSGeom_t *) pfnGEOSFunction_r) Line 3814 C++
> gdal.dll!OGRMVTLayer::GetNextRawFeature() Line 1381 C++
> [Inline Frame] gdal.dll!OGRGetNextFeatureThroughRaw<OGRMVTLayerBase>::GetNextFeature() Line 513 C++
> gdal.dll!OGRMVTLayerBase::GetNextFeature() Line 144 C++
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