Fullscreen video player causing widget tree error

[h4ck0v3rflow]

When using the media_kit video player package in a Flutter video player app, I encounter an error when I fullscreen the video player and then return to the portrait screen. The error message suggests that there is an issue with the widget tree and the dependencies between the widgets. Specifically, it seems that a widget is trying to access an ancestor that is no longer in the widget tree.

I have tried disposing of the video player properly when it is closed, but the issue persists. I have also checked that I am not adding any unnecessary dependencies to the video player, but the issue still occurs.

Here is the error message I receive:

'package:flutter/src/widgets/framework.dart': Failed assertion: line 6055 pos 14: '() {
        // check that it really is our descendant
        Element? ancestor = dependent._parent;
        while (ancestor != this && ancestor != null) {
          ancestor = ancestor._parent;
        }
        return ancestor == this;
      }()': is not true.

logs:

═══════ Exception caught by widgets library ═══════════════════════════════════
'package:flutter/src/widgets/framework.dart': Failed assertion: line 6055 pos 14: '() {
        // check that it really is our descendant
        Element? ancestor = dependent._parent;
        while (ancestor != this && ancestor != null) {
          ancestor = ancestor._parent;
        }
        return ancestor == this;
      }()': is not true.
The relevant error-causing widget was:
════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by widgets library ═══════════════════════════════════
'package:flutter/src/widgets/framework.dart': Failed assertion: line 5917 pos 14: '_dependents.isEmpty': is not true.
The relevant error-causing widget was:
════════════════════════════════════════════════════════════════════════════════
I/media_kit(21275): com.alexmercerind.media_kit_video.VideoOutputManager.create: -5476376645871447984

════════ Exception caught by scheduler library ═════════════════════════════════
Tried to build dirty widget in the wrong build scope.
════════════════════════════════════════════════════════════════════════════════
I/media_kit(21275): flutterJNIAPIAvailable = true
I/media_kit(21275): com.alexmercerind.media_kit_video.VideoOutput: id = 1
I/flutter (21275): {id: 1}
I/flutter (21275): media_kit: wakelock: _count = 2

════════ Exception caught by widgets library ═══════════════════════════════════
'package:flutter/src/widgets/framework.dart': Failed assertion: line 6055 pos 14: '() {
        // check that it really is our descendant
        Element? ancestor = dependent._parent;
        while (ancestor != this && ancestor != null) {
          ancestor = ancestor._parent;
        }
        return ancestor == this;
      }()': is not true.
The relevant error-causing widget was:

I have created a minimal reproducible example that demonstrates the issue and have attached it to this issue.

@zezo357

I would appreciate it if you could investigate this issue and provide a fix. Thank you.

[abdelaziz-mahdy]

Please provide a code sample, from what I am seeing the global key is not updated

[abdelaziz-mahdy]

I don't see the full screen logic, can you add it?

Since the problem is there!

[abdelaziz-mahdy]

well i dont see the reason of the error, so can you provide more logs? i dont see the error mentioning, media_kit, so a more detailed logs will help

and on our example it works correctly so i dont get the error. the code i am testing on are in this branch https://github.com/zezo357/media_kit/tree/examples since i am using custom controls like you, just to match the controls code

[h4ck0v3rflow]

well i dont see the reason of the error, so can you provide more logs? i dont see the error mentioning, media_kit, so a more detailed logs will help

and on our example it works correctly so i dont get the error. the code i am testing on are in this branch https://github.com/zezo357/media_kit/tree/examples since i am using custom controls like you, just to match the controls code

ok bro I will give you more logs detail as soon as possible.

[abdelaziz-mahdy]

There is another error before the one you mentioned

════════ Exception caught by rendering library ═════════════════════════════════
The following assertion was thrown during performLayout():
RenderFlex children have non-zero flex but incoming height constraints are unbounded.
When a column is in a parent that does not provide a finite height constraint, for example if it is in a vertical scrollable, it will try to shrink-wrap its children along the vertical axis. Setting a flex on a child (e.g. using Expanded) indicates that the child is to expand to fill the remaining space in the vertical direction.
These two directives are mutually exclusive. If a parent is to shrink-wrap its child, the child cannot simultaneously expand to fit its parent.
Consider setting mainAxisSize to MainAxisSize.min and using FlexFit.loose fits for the flexible children (using Flexible rather than Expanded). This will allow the flexible children to size themselves to less than the infinite remaining space they would otherwise be forced to take, and then will cause the RenderFlex to shrink-wrap the children rather than expanding to fit the maximum constraints provided by the parent.
If this message did not help you determine the problem, consider using debugDumpRenderTree():
https://flutter.dev/debugging/#rendering-layer
http://api.flutter.dev/flutter/rendering/debugDumpRenderTree.html
The affected RenderFlex is: RenderFlex#ed54c relayoutBoundary=up12 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
needs compositing
parentData: (can use size)
constraints: BoxConstraints(0.0<=w<=360.0, 0.0<=h<=Infinity)
size: Size(360.0, 751.0)

And duplicate global keys used, please fix those first and let me know, most probably its not a problem with media_kit it's the above errors causing the problem

[h4ck0v3rflow]

Ok brother I will try your suggestions.