Program: 123451
Project: 123451
Buggy source:
public void focusGained(FocusEvent e){
  redrawExpressionFilter();
  Control text=(Control)e.getSource();
  if (defaultText.equals(ControlUtils.getText(text))) {
    ControlUtils.setText(text,"String_Node_Str");
  }
  ExpressionFilterEntry currentExpressionFilterEntry=table.getExpressionFilter();
  mapperManager.getUiManager().selectLinks(DataMapTableView.this,Arrays.<ITableEntry>asList(currentExpressionFilterEntry),true,false);
  expressionFilterText.setBackground(null);
  expressionFilterText.setForeground(null);
  StyledTextHandler styledTextHandler=mapperManager.getUiManager().getTabFolderEditors().getStyledTextHandler();
  styledTextHandler.setCurrentEntry(currentExpressionFilterEntry);
  previousTextForExpressionFilter=currentExpressionFilterEntry.getExpression() == null ? "String_Node_Str" : currentExpressionFilterEntry.getExpression();
  styledTextHandler.getStyledText().setText(previousTextForExpressionFilter);
  expressionFilterText.setToolTipText(null);
  styledTextHandler.getStyledText().setEnabled(true);
  styledTextHandler.getStyledText().setEditable(true);
  expressionProposalStyledText=styledTextHandler.getContentProposalAdapter();
  expressionProposalProviderForExpressionFilter.init(table,getValidZonesForExpressionFilterField(),table.getExpressionFilter());
  expressionProposalStyledText.setContentProposalProvider(expressionProposalProviderForExpressionFilter);
  mapperManager.getUiManager().selectLinks(DataMapTableView.this,Arrays.<ITableEntry>asList(currentExpressionFilterEntry),true,false);
  colorExpressionFilterFromProblems(table,false);
}

Fixed version (ground truth):
public void focusGained(FocusEvent e){
  redrawExpressionFilter();
  Control text=(Control)e.getSource();
  if (defaultText.equals(ControlUtils.getText(text))) {
    ControlUtils.setText(text,"String_Node_Str");
  }
  ExpressionFilterEntry currentExpressionFilterEntry=table.getExpressionFilter();
  mapperManager.getUiManager().selectLinks(DataMapTableView.this,Arrays.<ITableEntry>asList(currentExpressionFilterEntry),true,false);
  expressionFilterText.setBackground(null);
  expressionFilterText.setForeground(null);
  StyledTextHandler styledTextHandler=mapperManager.getUiManager().getTabFolderEditors().getStyledTextHandler();
  styledTextHandler.setCurrentEntry(currentExpressionFilterEntry);
  previousTextForExpressionFilter=currentExpressionFilterEntry.getExpression() == null ? "String_Node_Str" : currentExpressionFilterEntry.getExpression();
  styledTextHandler.getStyledText().setText(previousTextForExpressionFilter);
  expressionFilterText.setToolTipText(null);
  styledTextHandler.getStyledText().setEnabled(true);
  styledTextHandler.getStyledText().setEditable(true);
  expressionProposalStyledText=styledTextHandler.getContentProposalAdapter();
  expressionProposalProviderForExpressionFilter.init(table,getValidZonesForExpressionFilterField(),table.getExpressionFilter());
  if (expressionProposalStyledText != null) {
    expressionProposalStyledText.setContentProposalProvider(expressionProposalProviderForExpressionFilter);
  }
  mapperManager.getUiManager().selectLinks(DataMapTableView.this,Arrays.<ITableEntry>asList(currentExpressionFilterEntry),true,false);
  colorExpressionFilterFromProblems(table,false);
}