test.gml

<?xml version="1.0" encoding="utf-8" ?>
<ogr:FeatureCollection
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://ogr.maptools.org/ PDI_ATF_ID_MSK_CLOLOW_L0c_DB001_DD00_B00.xsd"
     xmlns:ogr="http://ogr.maptools.org/"
     xmlns:gml="http://www.opengis.net/gml">
  <gml:boundedBy><gml:null>missing</gml:null></gml:boundedBy>
                                                                                                                                                                                                                                                                                               
</ogr:FeatureCollection>

public class TestOGR {

    public static void main(String args[])
    {
   
            ogr.RegisterAll();

            Driver driver = ogr.GetDriverByName("GML");
        String fileName= "/tmp/PDI_ATF_ID_MSK_CLOLOW_L0c_DB001_DD00_B00.gml";
            DataSource ds = driver.Open(fileName);
            if (ds == null) {  /* ds is NULL with gdal 1.9.0 (RH6) and does not crash */
             System.out.println("DS == NULL");
            }

            Layer layer = ds.GetLayerByIndex(0);
        int fc = layer.GetFeatureCount(); //code crashes here.... with gdal 1.11.4 because  "ds == null" condition evaluates to false
      
    }

}

With GDAL 1.9.0 if (ds == null) { condition is false for the given gml, but for GDAL 1.11.4 it is false.