Program: 71008
Project: 71008
Buggy source:
public void render(GLRenderer renderer,int flags){
  RenderProps props=getRenderProps();
  Material faceMat=props.getFaceMaterial();
  if (isSelected()) {
    faceMat=renderer.getSelectionMaterial();
  }
  GL2 gl=renderer.getGL2().getGL2();
  gl.glPushMatrix();
  Shading shading=props.getShading();
  if (!renderer.isSelecting()) {
    if (shading != Shading.NONE) {
      if (isSelected()) {
        renderer.getSelectionMaterial().apply(gl,GL2.GL_FRONT_AND_BACK);
      }
 else {
        faceMat.apply(gl,GL2.GL_FRONT_AND_BACK);
        gl.glLightModelf(GL2.GL_LIGHT_MODEL_TWO_SIDE,1);
      }
    }
  }
  if (props.getFaceStyle() != RenderProps.Faces.NONE) {
    int[] savedShadeModel=new int[1];
    gl.glGetIntegerv(GL2.GL_SHADE_MODEL,savedShadeModel,0);
    if (shading == Shading.NONE) {
      renderer.setLightingEnabled(false);
      if (isSelected()) {
        renderer.getSelectionColor().getColorComponents(myColorBuf);
        renderer.setColor(myColorBuf,false);
      }
 else {
        renderer.setColor(props.getFaceColorArray(),false);
      }
    }
 else     if (((shading != Shading.FLAT) || useVertexColouring) && !renderer.isSelecting()) {
      gl.glShadeModel(GL2.GL_SMOOTH);
    }
 else {
      gl.glShadeModel(GL2.GL_FLAT);
    }
    if (props.getDrawEdges()) {
      gl.glEnable(GL2.GL_POLYGON_OFFSET_FILL);
      gl.glPolygonOffset(1f,1f);
    }
    if (useVertexColouring) {
      renderer.setLightingEnabled(false);
    }
    if (displayList == 0 && useDisplayLists) {
      displayList=DisplayListManager.allocList(gl);
      displayListValid=false;
    }
    if (!displayListValid && !renderer.isSelecting()) {
      if (useDisplayLists) {
        gl.glNewList(displayList,GL2.GL_COMPILE);
      }
      drawFaces(gl,renderer,props,faceMat);
      if (useDisplayLists) {
        gl.glEndList();
        gl.glCallList(displayList);
        displayListValid=true;
      }
    }
 else     if (renderer.isSelecting()) {
      drawFaces(gl,renderer,props,faceMat);
    }
 else {
      gl.glCallList(displayList);
    }
    if (useVertexColouring) {
      renderer.setLightingEnabled(true);
    }
    if (props.getDrawEdges()) {
      gl.glDisable(GL2.GL_POLYGON_OFFSET_FILL);
    }
    if (shading == Shading.NONE) {
      renderer.setLightingEnabled(true);
    }
    gl.glShadeModel(savedShadeModel[0]);
  }
  if (!renderer.isSelecting()) {
    if (props.getBackMaterial() != null) {
      gl.glLightModelf(GL2.GL_LIGHT_MODEL_TWO_SIDE,1f);
    }
  }
  if (props.getDrawEdges()) {
    boolean reenableLighting=false;
    int[] savedLineWidth=new int[1];
    gl.glGetIntegerv(GL2.GL_LINE_WIDTH,savedLineWidth,0);
    int[] savedShadeModel=new int[1];
    gl.glGetIntegerv(GL2.GL_SHADE_MODEL,savedShadeModel,0);
    gl.glLineWidth(props.getLineWidth());
    if (props.getLineColor() != null && !renderer.isSelecting()) {
      reenableLighting=renderer.isLightingEnabled();
      renderer.setLightingEnabled(false);
      float[] color;
      if (isSelected()) {
        color=myColorBuf;
        renderer.getSelectionColor().getRGBColorComponents(color);
      }
 else {
        color=props.getLineColorArray();
      }
      renderer.setColor(color);
    }
    if (useVertexColouring && !renderer.isSelecting()) {
      gl.glShadeModel(GL2.GL_SMOOTH);
    }
 else {
      gl.glShadeModel(GL2.GL_FLAT);
    }
    if (edgeDisplayList == 0) {
      edgeDisplayList=DisplayListManager.allocList(gl);
      edgeDisplayListValid=false;
    }
    if (!edgeDisplayListValid && !renderer.isSelecting()) {
      if (useDisplayLists) {
        gl.glNewList(edgeDisplayList,GL2.GL_COMPILE);
      }
      drawEdges(gl,props);
      if (useDisplayLists) {
        gl.glEndList();
        gl.glCallList(edgeDisplayList);
        edgeDisplayListValid=true;
      }
    }
 else     if (renderer.isSelecting()) {
      drawEdges(gl,props);
    }
 else {
      gl.glCallList(edgeDisplayList);
    }
    if (reenableLighting) {
      renderer.setLightingEnabled(true);
    }
    gl.glLineWidth(savedLineWidth[0]);
    gl.glShadeModel(savedShadeModel[0]);
  }
  gl.glPopMatrix();
}

Fixed version (ground truth):
public void render(GLRenderer renderer,int flags){
  RenderProps props=getRenderProps();
  Material faceMat=props.getFaceMaterial();
  if (isSelected()) {
    faceMat=renderer.getSelectionMaterial();
  }
  GL2 gl=renderer.getGL2();
  gl.glPushMatrix();
  Shading shading=props.getShading();
  if (!renderer.isSelecting()) {
    if (shading != Shading.NONE) {
      if (isSelected()) {
        renderer.getSelectionMaterial().apply(gl,GL2.GL_FRONT_AND_BACK);
      }
 else {
        faceMat.apply(gl,GL2.GL_FRONT_AND_BACK);
        gl.glLightModelf(GL2.GL_LIGHT_MODEL_TWO_SIDE,1);
      }
    }
  }
  if (props.getFaceStyle() != RenderProps.Faces.NONE) {
    int[] savedShadeModel=new int[1];
    gl.glGetIntegerv(GL2.GL_SHADE_MODEL,savedShadeModel,0);
    if (shading == Shading.NONE) {
      renderer.setLightingEnabled(false);
      if (isSelected()) {
        renderer.getSelectionColor().getColorComponents(myColorBuf);
        renderer.setColor(myColorBuf,false);
      }
 else {
        renderer.setColor(props.getFaceColorArray(),false);
      }
    }
 else     if (((shading != Shading.FLAT) || useVertexColouring) && !renderer.isSelecting()) {
      gl.glShadeModel(GL2.GL_SMOOTH);
    }
 else {
      gl.glShadeModel(GL2.GL_FLAT);
    }
    if (props.getDrawEdges()) {
      gl.glEnable(GL2.GL_POLYGON_OFFSET_FILL);
      gl.glPolygonOffset(1f,1f);
    }
    if (useVertexColouring) {
      renderer.setLightingEnabled(false);
    }
    if (displayList == 0 && useDisplayLists) {
      displayList=DisplayListManager.allocList(gl);
      displayListValid=false;
    }
    if (!displayListValid && !renderer.isSelecting()) {
      if (useDisplayLists) {
        gl.glNewList(displayList,GL2.GL_COMPILE);
      }
      drawFaces(gl,renderer,props,faceMat);
      if (useDisplayLists) {
        gl.glEndList();
        gl.glCallList(displayList);
        displayListValid=true;
      }
    }
 else     if (renderer.isSelecting()) {
      drawFaces(gl,renderer,props,faceMat);
    }
 else {
      gl.glCallList(displayList);
    }
    if (useVertexColouring) {
      renderer.setLightingEnabled(true);
    }
    if (props.getDrawEdges()) {
      gl.glDisable(GL2.GL_POLYGON_OFFSET_FILL);
    }
    if (shading == Shading.NONE) {
      renderer.setLightingEnabled(true);
    }
    gl.glShadeModel(savedShadeModel[0]);
  }
  if (!renderer.isSelecting()) {
    if (props.getBackMaterial() != null) {
      gl.glLightModelf(GL2.GL_LIGHT_MODEL_TWO_SIDE,1f);
    }
  }
  if (props.getDrawEdges()) {
    boolean reenableLighting=false;
    int[] savedLineWidth=new int[1];
    gl.glGetIntegerv(GL2.GL_LINE_WIDTH,savedLineWidth,0);
    int[] savedShadeModel=new int[1];
    gl.glGetIntegerv(GL2.GL_SHADE_MODEL,savedShadeModel,0);
    gl.glLineWidth(props.getLineWidth());
    if (props.getLineColor() != null && !renderer.isSelecting()) {
      reenableLighting=renderer.isLightingEnabled();
      renderer.setLightingEnabled(false);
      float[] color;
      if (isSelected()) {
        color=myColorBuf;
        renderer.getSelectionColor().getRGBColorComponents(color);
      }
 else {
        color=props.getLineColorArray();
      }
      renderer.setColor(color);
    }
    if (useVertexColouring && !renderer.isSelecting()) {
      gl.glShadeModel(GL2.GL_SMOOTH);
    }
 else {
      gl.glShadeModel(GL2.GL_FLAT);
    }
    if (edgeDisplayList == 0) {
      edgeDisplayList=DisplayListManager.allocList(gl);
      edgeDisplayListValid=false;
    }
    if (!edgeDisplayListValid && !renderer.isSelecting()) {
      if (useDisplayLists) {
        gl.glNewList(edgeDisplayList,GL2.GL_COMPILE);
      }
      drawEdges(gl,props);
      if (useDisplayLists) {
        gl.glEndList();
        gl.glCallList(edgeDisplayList);
        edgeDisplayListValid=true;
      }
    }
 else     if (renderer.isSelecting()) {
      drawEdges(gl,props);
    }
 else {
      gl.glCallList(edgeDisplayList);
    }
    if (reenableLighting) {
      renderer.setLightingEnabled(true);
    }
    gl.glLineWidth(savedLineWidth[0]);
    gl.glShadeModel(savedShadeModel[0]);
  }
  gl.glPopMatrix();
}