Program: 151477
Project: 151477
Buggy source:
@SuppressWarnings("String_Node_Str") @Override public void complete(final CompleteOperation completeOperation,final InputComponent<?,Object> input,final ShellContext context,final String typedValue,final ConverterFactory converterFactory){
  SelectComponent<?,Object> selectComponent=(SelectComponent<?,Object>)input;
  Converter<Object,String> itemLabelConverter=(Converter<Object,String>)InputComponents.getItemLabelConverter(converterFactory,selectComponent);
  Iterable<Object> valueChoices=selectComponent.getValueChoices();
  List<String> choices=new ArrayList<String>();
  for (  Object choice : valueChoices) {
    String convert=itemLabelConverter.convert(choice);
    if (convert != null) {
      choices.add(convert);
    }
  }
  if (choices.size() > 1) {
    String startsWith=Parser.findStartsWith(choices);
    if (startsWith != null && startsWith.length() > 0 && startsWith.length() > typedValue.length()) {
      String substring=startsWith.substring(typedValue.length());
      String candidate=Parser.switchSpacesToEscapedSpacesInWord(substring);
      completeOperation.addCompletionCandidate(candidate);
      completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
    }
 else {
      completeOperation.addCompletionCandidates(choices);
      if (!completeOperation.getCompletionCandidates().isEmpty() && !typedValue.isEmpty()) {
        completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
      }
    }
  }
 else   if (choices.size() == 1) {
    completeOperation.addCompletionCandidate(choices.get(0).substring(typedValue.length()));
    if (!completeOperation.getCompletionCandidates().isEmpty() && !typedValue.isEmpty()) {
      completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
    }
  }
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") @Override public void complete(final CompleteOperation completeOperation,final InputComponent<?,Object> input,final ShellContext context,final String typedValue,final ConverterFactory converterFactory){
  SelectComponent<?,Object> selectComponent=(SelectComponent<?,Object>)input;
  Converter<Object,String> itemLabelConverter=(Converter<Object,String>)InputComponents.getItemLabelConverter(converterFactory,selectComponent);
  Iterable<Object> valueChoices=selectComponent.getValueChoices();
  List<String> choices=new ArrayList<String>();
  for (  Object choice : valueChoices) {
    String convert=itemLabelConverter.convert(choice);
    if (convert != null) {
      choices.add(convert);
    }
  }
  if (choices.size() > 1) {
    String startsWith=Parser.findStartsWith(choices);
    if (startsWith.length() > typedValue.length()) {
      String substring=startsWith.substring(typedValue.length());
      String candidate=Parser.switchSpacesToEscapedSpacesInWord(substring);
      completeOperation.addCompletionCandidate(candidate);
      completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
      completeOperation.doAppendSeparator(false);
    }
 else {
      completeOperation.addCompletionCandidates(choices);
      if (!completeOperation.getCompletionCandidates().isEmpty() && !typedValue.isEmpty()) {
        completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
      }
    }
  }
 else   if (choices.size() == 1) {
    completeOperation.addCompletionCandidate(choices.get(0).substring(typedValue.length()));
    completeOperation.setOffset(completeOperation.getCursor() - typedValue.length());
  }
}