Geom2dAPI_InterCurveCurve with Geom2d_OffsetCurve

Hello,

I've got an issue when using Geom2dAPI_InterCurveCurve with Geom2d_OffsetCurve. This is a simplified version of what I'm doing: am I missing something?

Handle( Geom2d_Line ) hLine1 = new Geom2d_Line( gp_Pnt2d( 1.0, 0.0 ), gp_Dir2d( 0.0, 1.0 ) );

Handle( Geom2d_Line ) hLine2 = new Geom2d_Line( gp_Pnt2d( 0.0, 1.0 ), gp_Dir2d( 1.0, 0.0 ) );

//This works fine
Geom2dAPI_InterCurveCurve oTest1( hLine1, hLine1, Precision::Confusion() );

Handle( Geom2d_OffsetCurve ) hOffsetLine1 = new Geom2d_OffsetCurve( hLine1, 0.3 );
Handle( Geom2d_OffsetCurve ) hOffsetLine2 = new Geom2d_OffsetCurve( hLine2, 0.3 );

//This throws Standard_DomainError exception.
Geom2dAPI_InterCurveCurve oTest2( hOffsetLine1, hOffsetLine2, Precision::Confusion() );

Please let me know if this type of question should be posted elsewhere.

Cheers,
Ian