Program: 121119
Project: 121119
Buggy source:
/** 
 * Init proposals of Text control, and StyledText in tab "Expression editor".
 * @param textControl
 * @param zones
 * @param tableViewerCreator
 * @param currentModifiedEntry
 */
protected void initExpressionProposals(final ExtendedTextCellEditorWithProposal cellEditor,Zone[] zones,final TableViewerCreator tableViewerCreator,ITableEntry currentModifiedEntry){
  if (this.expressionProposalProvider == null) {
    this.expressionProposalProvider=createExpressionProposalProvider();
  }
  this.expressionProposalProvider.init(abstractDataMapTable,zones,currentModifiedEntry);
  cellEditor.setContentProposalProvider(this.expressionProposalProvider);
  cellEditor.setData(expressionProposalProvider.getVariables());
  StringBuffer id=new StringBuffer();
  id.append(mapperManager.getAbstractMapComponent().getLabel() + "String_Node_Str");
  TableItem[] items=tableViewerCreator.getTable().getSelection();
  if (items.length == 1) {
    Object item=items[0].getData();
    if (item instanceof AbstractInOutTableEntry) {
      AbstractInOutTableEntry entry=(AbstractInOutTableEntry)item;
      id.append(entry.getParent().getName() + "String_Node_Str");
      id.append(entry.getMetadataColumn().getLabel());
    }
 else     if (item instanceof VarTableEntry) {
      VarTableEntry entry=(VarTableEntry)item;
      id.append(entry.getParent().getName() + "String_Node_Str");
      id.append(entry.getName());
    }
  }
  cellEditor.setOwnerId(id.toString());
  StyledTextHandler styledTextHandler=mapperManager.getUiManager().getTabFolderEditors().getStyledTextHandler();
  styledTextHandler.getStyledText().setEnabled(true);
  ContentProposalAdapterExtended expressionProposalStyledText=styledTextHandler.getContentProposalAdapter();
  expressionProposalStyledText.setContentProposalProvider(this.expressionProposalProvider);
}

Fixed version (ground truth):
/** 
 * Init proposals of Text control, and StyledText in tab "Expression editor".
 * @param textControl
 * @param zones
 * @param tableViewerCreator
 * @param currentModifiedEntry
 */
protected void initExpressionProposals(final ExtendedTextCellEditorWithProposal cellEditor,Zone[] zones,final TableViewerCreator tableViewerCreator,ITableEntry currentModifiedEntry){
  if (this.expressionProposalProvider == null) {
    this.expressionProposalProvider=createExpressionProposalProvider();
  }
  this.expressionProposalProvider.init(abstractDataMapTable,zones,currentModifiedEntry);
  cellEditor.setContentProposalProvider(this.expressionProposalProvider);
  cellEditor.setData(expressionProposalProvider.getVariables());
  StringBuffer id=new StringBuffer();
  id.append(mapperManager.getAbstractMapComponent().getLabel() + "String_Node_Str");
  TableItem[] items=tableViewerCreator.getTable().getSelection();
  if (items.length == 1) {
    Object item=items[0].getData();
    if (item instanceof AbstractInOutTableEntry) {
      AbstractInOutTableEntry entry=(AbstractInOutTableEntry)item;
      id.append(entry.getParent().getName() + "String_Node_Str");
      id.append(entry.getMetadataColumn().getLabel());
    }
 else     if (item instanceof VarTableEntry) {
      VarTableEntry entry=(VarTableEntry)item;
      id.append(entry.getParent().getName() + "String_Node_Str");
      id.append(entry.getName());
    }
  }
  cellEditor.setOwnerId(id.toString());
  if (!needInitProposals) {
    StyledTextHandler styledTextHandler=mapperManager.getUiManager().getTabFolderEditors().getStyledTextHandler();
    styledTextHandler.getStyledText().setEnabled(true);
    ContentProposalAdapterExtended expressionProposalStyledText=styledTextHandler.getContentProposalAdapter();
    expressionProposalStyledText.setContentProposalProvider(this.expressionProposalProvider);
  }
}