demo运行就直接崩溃

[yangzai100]

✓ Built build/app/outputs/flutter-apk/app-debug.apk.
Installing build/app/outputs/flutter-apk/app.apk...
I/flutter ( 6453): ══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════
I/flutter ( 6453): [exception: Null check operator used on a null value]
I/flutter ( 6453): [library: Flutter framework]
I/flutter ( 6453): [stack: #0 RenderViewportBase.hitTestChildren (package:flutter/src/rendering/viewport.dart:727:26)
I/flutter ( 6453): #1 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #2 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #3 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #4 RenderIgnorePointer.hitTest (package:flutter/src/rendering/proxy_box.dart:3618:31)
I/flutter ( 6453): #5 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #6 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #7 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #8 RenderProxyBoxWithHitTestBehavior.hitTest (package:flutter/src/rendering/proxy_box.dart:183:19)
I/flutter ( 6453): #9 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #10 RenderProxyBoxWithHitTestBehavior.hitTest (package:flutter/src/rendering/proxy_box.dart:183:19)
I/flutter ( 6453): #11 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #12 RenderProxyBoxWithHitTestBehavior.hitTest (package:flutter/src/rendering/proxy_box.dart:183:19)
I/flutter ( 6453): #13 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #14 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #15 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #16 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #17 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #18 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #19 RenderProxyBoxMixin.hitTestChildren (package:flutter/src/rendering/proxy_box.dart:135:19)
I/flutter ( 6453): #20 RenderBox.hitTest (package:flutter/src/rendering/box.dart:2511:11)
I/flutter ( 6453): #21 RenderSliverHelpers.hitTestBoxChild. (package:flutter/src/rendering/sliver.dart:1669:22)
I/flutter ( 6453): #22 BoxHitTestResult.addWithOutOfBandPosition (package:flutter/src/rendering/box.dart:902:31)
I/flutter ( 6453): #23 RenderSliverHelpers.hitTestBoxChild (package:flutter/src/rendering/sliver.dart:1666:19)
I/flutter ( 6453): #24 RenderSliverMultiBoxAdaptor.hitTestChildren (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:564:11)
I/flutter ( 6453): #25 RenderSliver.hitTest (package:flutter/src/rendering/sliver.dart:1287:11)
I/flutter ( 6453): #26 SliverHitTestResult.addWithAxisOffset (package:flutter/src/rendering/sliver.dart:858:31)

[yangzai100]

Flutter 版本是3.3