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### Is there an existing issue for this?
- [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues)
- [X] I have read the [guide to filing a bug](https://flutter.dev/docs/…
-
### Is there an existing issue for this?
- [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues)
- [X] I have read the [guide to filing a bug](https://flutter.dev/docs/…
-
### Is there an existing issue for this?
- [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues)
- [X] I have read the [guide to filing a bug](https://flutter.dev/do…
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```
unhandled error during test:
/b/build/slave/Linux/build/flutter/packages/flutter/test/widgets/sliver_list_test.dart
NoSuchMethodError: The getter 'pathSegments' was called on null.
Receiver: n…
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## Steps to Reproduce
Hi,
When I launch in Release/Profile mode, the following code will cause the problem shown in the picture.
**Expected results:**
in debug model
![image](https://use…
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As talked about on matrix I found that the layout phase of `NeonListView` takes to long.
This is probably the case because the main content isn't built lazily.
Just asking about how we would appro…
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## Use case
Many other frameworks come with this feature out of the box. There are 5 packages that provide sticky headers, none of which work properly in a CustomScrollView with a center key on…
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Steps to reporo:
1. Run DevTools on macos
2. Connect to an app
3. Kill the app to cause disconnect
4. Click button "Review History"
Expected: history of the application execution
Actual: emp…
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I am trying to build an app with slivers, but this seems wrong. I have an appbar which changes its size and it is pinned.. some widgets.. then another sliver which is pinned too and then some widgets.…
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as titled
code sample
```dart
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
static const String _title = 'Flutter Code…