Program: 151485
Project: 151485
Buggy source:
@SuppressWarnings({}) @Override public void complete(CompleteOperation completeOperation){
  try {
    ParameterInt param=context.getParser().getParameter();
    if (param.getName().startsWith(completeOperation.getBuffer()))     completeOperation.addCompletionCandidate(param.getName());
 else     if (param.getName().equals(completeOperation.getBuffer().trim())) {
      defaultCompletion(completeOperation);
    }
 else     if (completeOperation.getBuffer().startsWith(param.getName())) {
      ParsedCompleteObject completeObject=null;
      completeObject=new CommandLineCompletionParser(context.getParser()).findCompleteObject(completeOperation.getBuffer());
      if (completeObject.doDisplayOptions()) {
        if (completeObject.getName() != null && completeObject.getName().length() > 0) {
          if (param.findPossibleLongNamesWitdDash(completeObject.getName()).size() > 0) {
            if (param.findPossibleLongNamesWitdDash(completeObject.getName()).size() == 1) {
              completeOperation.addCompletionCandidate(param.findPossibleLongNamesWitdDash(completeObject.getName()).get(0));
              completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
            }
 else             completeOperation.addCompletionCandidates(param.findPossibleLongNamesWitdDash(completeObject.getName()));
          }
        }
 else {
          if (param.getOptionLongNamesWithDash().size() > 1) {
            completeOperation.addCompletionCandidates(param.getOptionLongNamesWithDash());
          }
 else {
            completeOperation.addCompletionCandidates(param.getOptionLongNamesWithDash());
            completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
          }
        }
      }
 else       if (completeObject.isOption()) {
        optionCompletion(completeOperation,completeObject);
      }
 else       if (completeObject.isArgument()) {
        argumentCompletion(completeOperation,completeObject);
      }
    }
  }
 catch (  CommandLineParserException e) {
    logger.warning(e.getMessage());
    return;
  }
}

Fixed version (ground truth):
@SuppressWarnings({}) @Override public void complete(CompleteOperation completeOperation){
  try {
    ParameterInt param=context.getParser().getParameters().get(0);
    if (param.getName().startsWith(completeOperation.getBuffer()))     completeOperation.addCompletionCandidate(param.getName());
 else     if (param.getName().equals(completeOperation.getBuffer().trim())) {
      defaultCompletion(completeOperation);
    }
 else     if (completeOperation.getBuffer().startsWith(param.getName())) {
      ParsedCompleteObject completeObject=null;
      completeObject=new CommandLineCompletionParser(context.getParser()).findCompleteObject(completeOperation.getBuffer());
      if (completeObject.doDisplayOptions()) {
        if (completeObject.getName() != null && completeObject.getName().length() > 0) {
          if (param.findPossibleLongNamesWitdDash(completeObject.getName()).size() > 0) {
            if (param.findPossibleLongNamesWitdDash(completeObject.getName()).size() == 1) {
              completeOperation.addCompletionCandidate(param.findPossibleLongNamesWitdDash(completeObject.getName()).get(0));
              completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
            }
 else             completeOperation.addCompletionCandidates(param.findPossibleLongNamesWitdDash(completeObject.getName()));
          }
        }
 else {
          if (param.getOptionLongNamesWithDash().size() > 1) {
            completeOperation.addCompletionCandidates(param.getOptionLongNamesWithDash());
          }
 else {
            completeOperation.addCompletionCandidates(param.getOptionLongNamesWithDash());
            completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
          }
        }
      }
 else       if (completeObject.isOption()) {
        optionCompletion(completeOperation,completeObject);
      }
 else       if (completeObject.isArgument()) {
        argumentCompletion(completeOperation,completeObject);
      }
    }
  }
 catch (  CommandLineParserException e) {
    logger.warning(e.getMessage());
    return;
  }
}