Program: 30882
Project: 30882
Buggy source:
@Override public MethodSpec generateMethodSpec(TypeUtil typeUtil){
  String returnVarName=getReturnVarName(RETURN_VAR_NAME_ROOT);
  MethodSpec.Builder methodBuilder=MethodSpec.methodBuilder(name).addAnnotation(Override.class).addModifiers(PUBLIC).returns(ClassName.get(typeUtil.intentType)).addStatement("String_Node_Str",ClassName.get(typeUtil.intentType),returnVarName,ClassName.get(typeUtil.intentType));
  if (action != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,action);
  }
  addDataAndOrType(methodBuilder,returnVarName,typeUtil);
  if (className != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,ClassName.get(className));
  }
  if (flags != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,flags);
  }
  for (  String category : categories) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,category);
  }
  for (  IntentFieldBinding fieldBinding : fields) {
    methodBuilder.addParameter(ClassName.get(fieldBinding.getType()),fieldBinding.getName());
    if (StringUtils.equals(fieldBinding.getName(),dataParam)) {
      continue;
    }
    if (fieldBinding.isArrayList()) {
      methodBuilder.addStatement("String_Node_Str",returnVarName,fieldBinding.getIntentType(),fieldBinding.getKey().getName(),fieldBinding.getName());
    }
 else {
      methodBuilder.addStatement("String_Node_Str",returnVarName,fieldBinding.getKey().getName(),fieldBinding.getName());
    }
  }
  methodBuilder.addStatement("String_Node_Str",returnVarName);
  return methodBuilder.build();
}

Fixed version (ground truth):
@Override public MethodSpec generateMethodSpec(TypeUtil typeUtil){
  String returnVarName=getReturnVarName(RETURN_VAR_NAME_ROOT);
  MethodSpec.Builder methodBuilder=MethodSpec.methodBuilder(name).addAnnotation(Override.class).addModifiers(PUBLIC).returns(ClassName.get(typeUtil.intentType)).addStatement("String_Node_Str",ClassName.get(typeUtil.intentType),returnVarName,ClassName.get(typeUtil.intentType));
  if (action != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,action);
  }
  addDataAndOrType(methodBuilder,returnVarName,typeUtil);
  if (className != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,ClassName.get(className));
  }
  if (flags != null) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,flags);
  }
  for (  String category : categories) {
    methodBuilder.addStatement("String_Node_Str",returnVarName,category);
  }
  for (  IntentFieldBinding fieldBinding : fields) {
    methodBuilder.addParameter(ClassName.get(fieldBinding.getType()),fieldBinding.getName());
    if (StringUtils.equals(fieldBinding.getName(),dataParam)) {
      continue;
    }
    String stmt="String_Node_Str";
    if (fieldBinding.isArrayList()) {
      stmt=stmt.concat("String_Node_Str");
    }
 else {
      stmt=stmt.concat("String_Node_Str");
    }
    String keyValue;
    KeySpec key=fieldBinding.getKey();
    if (StringUtils.isBlank(key.getName())) {
      keyValue=key.getValue();
      stmt=stmt.concat("String_Node_Str");
    }
 else {
      keyValue=key.getName();
      stmt=stmt.concat("String_Node_Str");
    }
    stmt=stmt.concat("String_Node_Str");
    if (fieldBinding.isArrayList()) {
      methodBuilder.addStatement(stmt,returnVarName,fieldBinding.getIntentType(),keyValue,fieldBinding.getName());
    }
 else {
      methodBuilder.addStatement(stmt,returnVarName,keyValue,fieldBinding.getName());
    }
  }
  methodBuilder.addStatement("String_Node_Str",returnVarName);
  return methodBuilder.build();
}