【发布时间】：2023-04-11 05:11:01
【问题描述】：
渲染图像时，我收到以下运行时错误。奇怪的是，图像在设备上显示得很好，并且在其他页面上显示时没有此错误。错误消息没有提供任何有用的信息。
这是一段代码的 sn-p，后面是转储：
Container(
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
),
padding: EdgeInsets.all(20.0),
margin: EdgeInsets.all(20.0),
child: Column(
children: <Widget>[
Padding(
child: Center(child: Image.network(url)),
padding: EdgeInsets.only(bottom: 12.0)),
//Text(image.name),
],
)),
I/flutter (6080): #17 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #18 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #19 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #20 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#21 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)I/flutter (6080):#22 SingleChildRenderObjectElement.mount (包：flutter/src/widgets/framework.dart:4876:14） I/flutter (6080): #23 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #24 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #25 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #26 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #27 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #28 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #29 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #30 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #31 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #32 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #33 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #34 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #35 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #36 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #37 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080): #38 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #39 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#40 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #41 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #42 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #43 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #44 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #45 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#46 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #47 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #48 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #49 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #50 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080): #51 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #52 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#53 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #54 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #55 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #56 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #57 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #58 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #59 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #60 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #61 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#62 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #63 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #64 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #65 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #66 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #67 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #68 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #69 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080): #70 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #71 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#72 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #73 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #74 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #75 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #76 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #77 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#78 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #79 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #80 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #81 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #82 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #83 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #84 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #85 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #86 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#87 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #88 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #89 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #90 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #91 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080): #92 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #93 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#94 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #95 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #96 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #97 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #98 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080): #99 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #100 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#101 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32) I/flutter (6080): #102 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #103 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #104 _TheatreElement.mount (package:flutter/src/widgets/overlay.dart:494:16) I/flutter (6080): #105 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #106 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #107 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #108 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #109 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #110 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#111 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#112 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#113 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #114 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #115 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #116 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080):#117 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#118 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#119 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #120 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #121 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #122 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #123 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #124 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #125 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #126 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#127 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#128 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#129 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #219 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #220 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #221 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #222 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #223 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #224 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #225 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#226 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#227 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#228 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #229 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #230 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #231 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080):#232 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#233 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#234 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #235 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #236 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #237 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #238 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#239 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#240 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#241 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #242 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #243 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #244 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080):#245 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#246 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#247 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #248 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #249 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #250 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #251 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#252 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#253 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#254 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #255 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #256 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #257 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080):#258 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#259 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#260 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #261 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #262 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #263 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #264 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #265 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #266 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #267 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080): #268 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#269 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #270 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #271 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #272 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #273 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #274 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #275 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #276 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #277 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #278 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080): #327 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14) I/flutter (6080): #328 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14) I/flutter (6080): #329 Element.updateChild (package:flutter/src/widgets/框架.dart:2759:12) I/flutter (6080):#330 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #331 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080):#332 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080):#333 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#334 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#335 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #336 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #337 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #338 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #339 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#340 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#341 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#342 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080):#343 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #344 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #345 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5) I/flutter (6080): #346 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11) I/flutter (6080):#347 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)I/flutter (6080):#348 Element.inflateWidget (package:flutter/src/widgets/ framework.dart:2956:14)I/flutter (6080):#349 Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12) I/flutter (6080): #350 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4659:32) I/flutter (6080): #351 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4992:17) I/flutter (6080): #352 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080):#353 _TheatreElement.update (package:flutter/src/widgets/overlay.dart:508:16) I/flutter (6080): #354 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080):#355 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #356 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #357 StatefulElement.update (package:flutter/src/widgets/framework.dart:3894:5)I/flutter (6080): #358 Element.updateChild (package:flutter/src/widgets/框架.dart:2748:15) I/flutter (6080):#359 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #360 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #361 ProxyElement.update (package:flutter/src/widgets/framework.dart:4006:5) I/flutter (6080): #362 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080): #363 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4883:14) I/flutter (6080): #364 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080):#365 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #366 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter (6080): #367 StatefulElement.update (package:flutter/src/widgets/framework.dart:3894:5)I/flutter (6080): #368 Element.updateChild (package:flutter/src/widgets/框架.dart:2748:15) I/flutter (6080): #369 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4883:14) I/flutter (6080): #370 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080): #371 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4883:14) I/flutter (6080): #372 Element.updateChild (package:flutter/src/widgets/framework.dart:2748:15) I/flutter (6080):#373 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16) I/flutter (6080): #374 Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5) I/flutter（6080）：#375 BuildOwner.buildScope（包：flutter/src/widgets/framework.dart：2273:33）I/flutter（6080）：#376 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame（包：flutter绑定.dart:700:20) I/flutter (6080): #377 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:268:5) I/flutter (6080): #378 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:988:15) I/flutter (6080): #379 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:928:9) I/flutter (6080): #380 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:840:5) I/flutter (6080):#384 _invoke (dart:ui/hooks.dart:209:10) I/flutter (6080): #385 _drawFrame (dart:ui/hooks.dart:168:3) I/flutter（6080）：（从类 _AssertionError 和包 dart:async 中删除了 5 帧） 我/颤振（6080）：══════════════════════════════════════════════════════ ══════════════════════════════════════════════════ ═══════ I/flutter（6080）：引发了另一个异常：'package:flutter/src/painting/image_provider.dart'： 断言失败：第 455 行 pos 14: 'url != null': is not true.
【问题讨论】：