[core] check null data in query source features

src/mbgl/tile/geometry_tile.cpp

@@ -165,6 +165,11 @@ void GeometryTile::queryRenderedFeatures(
 void GeometryTile::querySourceFeatures(
     std::vector<Feature>& result,
     const style::SourceQueryOptions& options) {
+
+    // Data not yet available
+    if (!data) {
+        return;
+    }
     
     // No source layers, specified, nothing to do
     if (!options.sourceLayers) {

test/tile/vector_tile.test.cpp

@@ -86,3 +86,12 @@ TEST(VectorTile, Issue7615) {
 
     EXPECT_EQ(symbolBucket.get(), tile.getBucket(symbolLayer));
 }
+
+TEST(VectorTile, Issue8542) {
+    VectorTileTest test;
+    VectorTile tile(OverscaledTileID(0, 0, 0), "source", test.updateParameters, test.tileset);
+
+    // Query before data is set
+    std::vector<Feature> result;
+    tile.querySourceFeatures(result, { { {"layer"} }, {} });
+}