dde-dconfig-editor工具中，配置项值含有较多字符时，访问后工具异常退出

[yicold]

SUMMARY | 问题概要

1. 通过终端启动dde-dconfig-editor；
2. 访问配置项-a org.deepin.dde.authentication -r org.deepin.dde.authentication.limit -k Limits，使Limits的配置输入框为编辑状态；
3. 切换至任意其它配置项后，dde-dconfig-editor工具异常退出。

DTK and OS VERSIONS | DTK&系统版本信息

系统版本：uos 1060
dtk：

ii  libdtkcommon                                  5.6.8-1                            
ii  libdtkcore5:amd64                             5.6.8-1                            
ii  libdtkgui5:amd64                              5.6.8.3-1                           
ii  libdtkwidget5:amd64                           5.6.11.5-1                          

Minimal Reproducible Case Code | 最小复现案例代码

无代码示例，参考问题概要。

OBSERVED RESULT | 观察到的结果

终端内输出错误信息：

cold@cold-UOS:~$ dde-dconfig-editor 
QDBusMarshaller: type `std::nullptr_t' (51) is not registered with D-BUS. Use qDBusRegisterMetaType to register it
dbus[19532]: Array or variant type requires that type variant be written, but end_dict_entry was written.
The overall signature expected here was '' and we are on byte 24 of that signature.
  D-Bus not built with -rdynamic so unable to print a backtrace
已放弃

EXPECTED RESULT | 期望的结果

No response

ADDITIONAL INFORMATION | 额外补充

No response