creator 1.4.2xcode编译时，报 Conversion function from 'nullptr_t' to 'JS::MutableHandleValue' (aka 'MutableHandle<JS::Value>') invokes a deleted function

Creator 2.x
#1

如题
creator 1.4.2xcode编译时，报 Conversion function from ‘nullptr_t’ to ‘JS::MutableHandleValue’ (aka ‘MutableHandleJS::Value’) invokes a deleted function错误

#2

代码为
ScriptingCore::getInstance()->evalString(ttflag, nullptr);