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Bad state: Stream has already been listened to CombineLatestStream #763

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victorcode1 opened this issue Aug 7, 2024 · 2 comments
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@victorcode1
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I have this problem when navigating between widgets either with go router or with navigator I think a dispose() event is necessary for this class

`

When the exception was thrown, this was the stack:
#4 _StreamBuilderBaseState._subscribe (package:flutter/src/widgets/async.dart:130:38)
async.dart:130
#5 _StreamBuilderBaseState.initState (package:flutter/src/widgets/async.dart:104:5)
async.dart:104
#6 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5748:55)
framework.dart:5748
#7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5593:5)
framework.dart:5593
... Normal element mounting (9 frames)
#16 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4468:16)
framework.dart:4468
#17 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
framework.dart:3963
#18 _LayoutBuilderElement._rebuildWithConstraints.updateChildCallback (package:flutter/src/widgets/layout_builder.dart:207:18)
layout_builder.dart:207
#19 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3038:19)
framework.dart:3038
#20 _LayoutBuilderElement._rebuildWithConstraints (package:flutter/src/widgets/layout_builder.dart:231:12)
layout_builder.dart:231
#21 RenderObject.invokeLayoutCallback. (package:flutter/src/rendering/object.dart:2719:59)
object.dart:2719
#22 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1098:15)
object.dart:1098
#23 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:2719:14)
object.dart:2719
#24 RenderConstrainedLayoutBuilder.rebuildIfNecessary (package:flutter/src/widgets/layout_builder.dart:278:5)
layout_builder.dart:278
#25 _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:369:5)
layout_builder.dart:369
#26 RenderObject.layout (package:flutter/src/rendering/object.dart:2608:7)
object.dart:2608
#27 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:111:21)
proxy_box.dart:111
#28 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2446:7)
object.dart:2446
#29 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1052:18)
object.dart:1052
#30 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1065:15)
object.dart:1065
#31 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:602:23)
binding.dart:602
#32 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1164:13)
binding.dart:1164
#33 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:468:5)
binding.dart:468
#34 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1397:15)
binding.dart:1397
#35 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1318:9)
binding.dart:1318
#36 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1176:5)
binding.dart:1176
#40 _invoke (dart:ui/hooks.dart:314:10)
hooks.dart:314
#41 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:419:5)
platform_dispatcher.dart:419
#42 _drawFrame (dart:ui/hooks.dart:283:31)
hooks.dart:283
(elided 7 frames from dart:async)

`

@hoc081098
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It is single-subscription stream, consider converting it to broadcast stream by using share(), shareValue(), shareValueSeeded(), ...

@hoc081098
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late final valueStream = originalStream.publishValueSeeded(...)
late final StreamSubscription<void> sub;

initState() {
  sub = valueStream.connect();
}

dispose() {
  sub.cancel()
}

// Use valueStream with StreamBuilder...

@hoc081098 hoc081098 added question waiting for response Waiting for follow up labels Aug 13, 2024
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