Program: 151472
Project: 151472
Buggy source:
@Override public void complete(CompleteOperation completeOperation){
  String line=completeOperation.getBuffer();
  ShellContext shellContext=shell.newShellContext(null);
  final AbstractShellInteraction cmd=shell.findCommand(shellContext,line);
  if (cmd == null) {
    Collection<AbstractShellInteraction> commands=shell.findMatchingCommands(shellContext,line);
    for (    AbstractShellInteraction command : commands) {
      completeOperation.addCompletionCandidate(command.getName());
    }
  }
 else   if (line.equals(cmd.getName())) {
    completeOperation.addCompletionCandidate("String_Node_Str");
  }
 else {
    try {
      ParsedCompleteObject completeObject=cmd.parseCompleteObject(line);
      if (completeObject.doDisplayOptions()) {
        List<String> options=cmd.getCompletionOptions(completeObject.getName(),line);
        completeOperation.addCompletionCandidates(options);
        if (completeOperation.getCompletionCandidates().size() == 1) {
          completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
        }
      }
 else {
        final InputComponent<?,Object> input;
        if (completeObject.isOption()) {
          input=cmd.getInputs().get(completeObject.getName());
        }
 else         if (completeObject.isArgument()) {
          input=cmd.getInputs().get(ARGUMENTS_INPUT_NAME);
        }
 else {
          input=null;
        }
        String typedValue=completeObject.getValue();
        if (input != null) {
          CompletionStrategy completionObj=CompletionStrategyFactory.getCompletionFor(input);
          completionObj.complete(completeOperation,input,shellContext,typedValue,shell.getConverterFactory());
        }
      }
    }
 catch (    ArgumentParserException e) {
      if (!cmd.getInputs().isEmpty()) {
        completeOperation.doAppendSeparator(false);
        completeOperation.addCompletionCandidate(line + "String_Node_Str");
      }
    }
catch (    Exception e) {
      logger.log(Level.WARNING,"String_Node_Str",e);
      return;
    }
  }
}

Fixed version (ground truth):
@Override public void complete(CompleteOperation completeOperation){
  String line=completeOperation.getBuffer();
  ShellContext shellContext=shell.newShellContext(null);
  final AbstractShellInteraction cmd=shell.findCommand(shellContext,line);
  if (cmd == null) {
    Collection<AbstractShellInteraction> commands=shell.findMatchingCommands(shellContext,line);
    for (    AbstractShellInteraction command : commands) {
      completeOperation.addCompletionCandidate(command.getName());
    }
  }
 else   if (line.equals(cmd.getName())) {
    completeOperation.addCompletionCandidate("String_Node_Str");
  }
 else {
    try {
      ParsedCompleteObject completeObject=cmd.parseCompleteObject(line);
      if (completeObject.doDisplayOptions()) {
        List<String> options=cmd.getCompletionOptions(completeObject.getName(),line);
        completeOperation.addCompletionCandidates(options);
        if (completeOperation.getCompletionCandidates().size() == 1) {
          completeOperation.setOffset(completeOperation.getCursor() - completeObject.getOffset());
        }
      }
 else {
        final InputComponent<?,Object> input;
        if (completeObject.isOption()) {
          input=cmd.getInputs().get(completeObject.getName());
        }
 else         if (completeObject.isArgument()) {
          input=cmd.getInputs().get(ARGUMENTS_INPUT_NAME);
        }
 else {
          input=null;
        }
        String typedValue=completeObject.getValue();
        if (input != null) {
          CompletionStrategy completionObj=CompletionStrategyFactory.getCompletionFor(input);
          completionObj.complete(completeOperation,input,shellContext,typedValue,shell.getConverterFactory());
        }
        if (completeOperation.getCompletionCandidates().size() > 1) {
          completeOperation.removeEscapedSpacesFromCompletionCandidates();
        }
      }
    }
 catch (    ArgumentParserException e) {
      if (!cmd.getInputs().isEmpty()) {
        completeOperation.doAppendSeparator(false);
        completeOperation.addCompletionCandidate(line + "String_Node_Str");
      }
    }
catch (    Exception e) {
      logger.log(Level.WARNING,"String_Node_Str",e);
      return;
    }
  }
}