Program: 35439
Project: 35439
Buggy source:
private void initComponent(){
  this.setPlain(true);
  this.setModal(true);
  this.setBlinkModal(true);
  this.setLayout(new FitLayout());
  this.setSize(650,300);
  this.setHeadingHtml(I18N.CONSTANTS.dedupeContactWindowTitle());
  possibleDuplicatesGrid=generatePossibleDuplicatesGrid();
  firstStepMainButton=generateFirstStepMainButton();
  LayoutContainer firstStepButtonsContainer=Layouts.border();
  firstStepButtonsContainer.add(firstStepMainButton,Layouts.borderLayoutData(Style.LayoutRegion.EAST));
  LayoutContainer firstStepContainer=Layouts.border();
  firstStepContainer.setScrollMode(Style.Scroll.AUTOY);
  firstStepContainer.add(generateMessageLabel(),Layouts.borderLayoutData(Style.LayoutRegion.NORTH,50f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.HALF_BOTTOM,Layouts.Margin.HALF_LEFT));
  firstStepContainer.add(possibleDuplicatesGrid,Layouts.borderLayoutData(Style.LayoutRegion.CENTER,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_BOTTOM));
  firstStepContainer.add(firstStepButtonsContainer,Layouts.borderLayoutData(Style.LayoutRegion.SOUTH,20f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.BOTTOM,Layouts.Margin.DOUBLE_LEFT));
  duplicatedPropertiesGrid=generateDuplicatedPropertiesGrid();
  secondStepMainButton=generateSecondStepMainButton();
  LayoutContainer secondStepButtonsContainer=Layouts.border();
  secondStepButtonsContainer.add(secondStepMainButton,Layouts.borderLayoutData(Style.LayoutRegion.EAST));
  secondStepContainer=Layouts.border();
  secondStepContainer.setScrollMode(Style.Scroll.AUTOY);
  secondStepContainer.add(duplicatedPropertiesGrid,Layouts.borderLayoutData(Style.LayoutRegion.CENTER,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_BOTTOM));
  secondStepContainer.add(secondStepButtonsContainer,Layouts.borderLayoutData(Style.LayoutRegion.SOUTH,20f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.BOTTOM,Layouts.Margin.DOUBLE_LEFT));
  cardLayout=new CardLayout();
  LayoutContainer mainContainer=new LayoutContainer(cardLayout);
  mainContainer.add(firstStepContainer);
  mainContainer.add(secondStepContainer);
  cardLayout.setActiveItem(firstStepContainer);
  add(mainContainer);
}

Fixed version (ground truth):
private void initComponent(){
  this.setPlain(true);
  this.setModal(true);
  this.setBlinkModal(true);
  this.setLayout(new FitLayout());
  this.setSize(650,300);
  this.setHeadingHtml(I18N.CONSTANTS.dedupeContactWindowTitle());
  possibleDuplicatesGrid=generatePossibleDuplicatesGrid();
  firstStepMainButton=generateFirstStepMainButton();
  LayoutContainer firstStepButtonsContainer=Layouts.border();
  firstStepButtonsContainer.add(firstStepMainButton,Layouts.borderLayoutData(Style.LayoutRegion.EAST));
  LayoutContainer firstStepContainer=Layouts.border();
  firstStepContainer.setScrollMode(Style.Scroll.AUTOY);
  firstStepContainer.add(generateMessageLabel(),Layouts.borderLayoutData(Style.LayoutRegion.NORTH,50f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.HALF_BOTTOM,Layouts.Margin.HALF_LEFT));
  firstStepContainer.add(possibleDuplicatesGrid,Layouts.borderLayoutData(Style.LayoutRegion.CENTER,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_BOTTOM));
  firstStepContainer.add(firstStepButtonsContainer,Layouts.borderLayoutData(Style.LayoutRegion.SOUTH,20f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.BOTTOM,Layouts.Margin.DOUBLE_LEFT));
  duplicatedPropertiesGrid=generateDuplicatedPropertiesGrid();
  secondStepMainButton=generateSecondStepMainButton();
  LayoutContainer secondStepButtonsContainer=Layouts.border();
  secondStepButtonsContainer.add(secondStepMainButton,Layouts.borderLayoutData(Style.LayoutRegion.EAST));
  cancelSecondStepButton=generateCancelSecondStepButton();
  secondStepButtonsContainer.add(cancelSecondStepButton,Layouts.borderLayoutData(Style.LayoutRegion.WEST));
  secondStepContainer=Layouts.border();
  secondStepContainer.setScrollMode(Style.Scroll.AUTOY);
  secondStepContainer.add(duplicatedPropertiesGrid,Layouts.borderLayoutData(Style.LayoutRegion.CENTER,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_BOTTOM));
  secondStepContainer.add(secondStepButtonsContainer,Layouts.borderLayoutData(Style.LayoutRegion.SOUTH,20f,Layouts.Margin.HALF_TOP,Layouts.Margin.HALF_RIGHT,Layouts.Margin.BOTTOM,Layouts.Margin.DOUBLE_LEFT));
  cardLayout=new CardLayout();
  LayoutContainer mainContainer=new LayoutContainer(cardLayout);
  mainContainer.add(firstStepContainer);
  mainContainer.add(secondStepContainer);
  cardLayout.setActiveItem(firstStepContainer);
  add(mainContainer);
}