Flutter Hive.box（'；box#u name'；）.listenable（）get，`The method'；设置'；在null“”时调用，在颤振时出错

当我尝试使用没有键的Hive.box（'box_name'）.listenable（）时，发生错误：

════════ Exception caught by widgets library ═══════════════════════════════════
The following NoSuchMethodError was thrown building FutureBuilder<dynamic>(dirty, state: _FutureBuilderState<dynamic>#566bb):
The method 'toSet' was called on null.
Receiver: null
Tried calling: toSet()

The relevant error-causing widget was
    FutureBuilder<dynamic> 
package:hive_benchmark/sketcpad/sketchpad.dart:109
When the exception was thrown, this was the stack
#0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:53:5)
#1      BoxX.listenable 
package:hive_flutter/src/box_extensions.dart:11
#2      _DrawingScreenState.build.<anonymous closure> 
package:hive_benchmark/sketcpad/sketchpad.dart:120
#3      _FutureBuilderState.build 
package:flutter/…/widgets/async.dart:732
#4      StatefulElement.build 
package:flutter/…/widgets/framework.dart:4619
...
════════════════════════════════════════════════════════════════════════════════

════════ widgets库捕获到异常═══════════════════════════════════
生成FutureBuilder时引发了以下NoSuchMethodError（脏，状态：_FutureBuilderState#566bb）：
对null调用了方法“toSet”。
收件人：空
已尝试呼叫：toSet（）
导致错误的相关小部件已被删除
未来建设者
包装：hive_benchmark/sketcpad/sketchpad。省道：109
当抛出异常时，这是堆栈
#0 Object.noSuchMethod（省道：核心补片/对象补片。省道：53:5）
#1.x.listenable
包装：蜂箱颤振/src/box\u扩展。省道：11
#2_DrawingScreenState.build。
包装：hive_benchmark/sketcpad/sketchpad。省道：120
#3_FutureBuilderState.build
包：flatter/../widgets/async.dart:732
#4 StatefulElement.build
包：flatter/../widgets/framework.dart:4619
...
════════════════════════════════════════════════════════════════════════════════

这个问题已经解决，因为

蜂巢颤振：^0.3.0+2

只需升级依赖项