#14895: Improve stability when importing malformed input files

* #14895: Fix null grid dereference when importing mismatching GRDECL
* #14895: Fix out-of-bounds read in perforation interval import
* #14895: Validate connectivity indices in VTK import
* #14895: Fix heap overflow for odd PORV count in dual porosity cases
* #14895: Update roffcpp to validate array lengths when parsing ROFF files

ApplicationLibCode/GeoMech/GeoMechFileInterface/RifVtkReader.cpp

@@ -33,6 +33,7 @@
 
 #include <QString>
 
+#include <algorithm>
 #include <map>
 
 namespace RifVtkFieldNames
@@ -292,6 +293,11 @@ std::expected<RigElementType, std::string>
             std::vector<unsigned> connectivity = RifVtkImportUtil::readConnectivity( piece );
             if ( connectivity.empty() ) return std::unexpected( "No connectivity found: " + d.filepath.string() );
 
+            if ( std::ranges::any_of( connectivity, [&vertices]( unsigned index ) { return index >= vertices.size(); } ) )
+            {
+                return std::unexpected( "Connectivity refers to a point that does not exist: " + d.filepath.string() );
+            }
+
             std::vector<std::pair<int, cvf::Vec3d>> partNodes;
             for ( int i = 0; i < static_cast<int>( vertices.size() ); i++ )
             {