In reverse mode, the localToGlobal method of SliverMainAxisGroup's children returned incorrect positions. #159787
Description
Steps to reproduce
import 'package:flutter/material.dart';
GlobalKey key = GlobalKey();
void main() {
runApp(
MaterialApp(
home: Scaffold(
body: Align(
alignment: Alignment.topLeft,
child: SizedBox(
height: 400,
child: CustomScrollView(
reverse: true,
slivers: [
SliverMainAxisGroup(
slivers: [
SliverToBoxAdapter(child: Container(height: 70, color: Colors.red)),
SliverToBoxAdapter(
child: SizedBox(
height: 20,
child: Text("1", key: key),
),
),
SliverToBoxAdapter(child: Container(height: 700, color: Colors.blue)),
],
),
],
),
),
),
floatingActionButton: IconButton(
onPressed: () {
RenderBox rb = key.currentContext!.findRenderObject() as RenderBox;
print(rb.localToGlobal(Offset.zero));
},
icon: const Icon(Icons.add),
),
),
),
);
}Run the code above and click the button.
Expected results
Output: Offset(0.0, 310.0).
Actual results
Output: Offset(0.0, 70.0).
Screenshots or Video
Flutter Doctor output
Doctor output
Doctor summary (to see all details, run flutter doctor -v):
[!] Flutter (Channel [user-branch], 3.27.0-1.0.pre.699, on macOS 15.1 24B83 darwin-arm64, locale zh-Hans-CN)
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! Doctor found issues in 3 categories.Metadata
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Important issues not at the top of the work listViewports, list views, slivers, etc.Found to occur in 3.24Found to occur in 3.27flutter/packages/flutter repository. See also f: labels.There is a PR awaiting someone to take it across the finish lineThe issue has been confirmed reproducible and is ready to work onIssue is closed as already fixed in a newer versionOwned by Framework teamTriaged by Framework team