Memory Leak: _ScreenshotPaintingContext.toImage does not dispose created _ScreenshotContainerLayer. #135827
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
_ScreenshotPaintingContext.toImage does not dispose created _ScreenshotContainerLayer instance.
Test to reveal the leak:
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
import 'widget_inspector_test_utils.dart';
void main() {
_TestWidgetInspectorService.runTests();
}
class _TestWidgetInspectorService extends TestWidgetInspectorService {
// These tests need access to protected members of WidgetInspectorService.
static void runTests() {
final TestWidgetInspectorService service = TestWidgetInspectorService();
WidgetInspectorService.instance = service;
testWidgetsWithLeakTracking('_ScreenshotPaintingContext.toImage leak',
(WidgetTester tester) async {
final TestWidgetInspectorService service = TestWidgetInspectorService();
WidgetInspectorService.instance = service;
await tester.pumpWidget(
const Center(
child: RepaintBoundary(
child: ColoredBox(
color: Colors.red,
child: Padding(
padding: EdgeInsets.all(100.0),
child: SizedBox(
height: 100.0,
width: 100.0,
),
),
),
),
),
);
final Element repaintBoundary =
find.byType(RepaintBoundary).evaluate().single;
final ui.Image? screenshot1 = await service.screenshot(
repaintBoundary,
width: 300.0,
height: 300.0,
);
addTearDown(() => screenshot1?.dispose());
}, leakTrackingTestConfig: LeakTrackingTestConfig.debugNotDisposed());
}
}Test output
Expected: leak free
Actual: <Instance of 'Leaks'>
Which: contains leaks:
# The text is generated by leak_tracker.
# For leak troubleshooting tips open:
# https://github.com/dart-lang/leak_tracker/blob/main/doc/TROUBLESHOOT.md
notDisposed:
total: 2
objects:
_ScreenshotContainerLayer:
test: _ScreenshotPaintingContext.toImage leak
identityHashCode: 557158822
context:
start: >
#6_______flutterEventToLeakTracker_
test_widgets.dart:24
#7______MemoryAllocations.dispatchObjectEvent_
memory_allocations.dart:241
#8______MemoryAllocations.dispatchObjectCreated_
memory_allocations.dart:275
#9______new_Layer_
layer.dart:143
#10_____new_ContainerLayer_(package:flutter/src/rendering/layer.dart)
layer.dart:1
#11_____new_OffsetLayer_(package:flutter/src/rendering/layer.dart)
layer.dart:1
#12_____new__ScreenshotContainerLayer_(package:flutter/src/widgets/widget_inspector.dart)
widget_inspector.dart:1
#13_____new__ScreenshotData_
widget_inspector.dart:339
#14______ScreenshotPaintingContext.toImage_
widget_inspector.dart:563
#15_____WidgetInspectorService.screenshot_
widget_inspector.dart:2096
#16______TestWidgetInspectorService.runTests.<anonymous_closure>_
widget_inspector_1_test.dart:45
<asynchronous_suspension>
#17_____testWidgetsWithLeakTracking.wrappedCallBack_
test_widgets.dart:127
<asynchronous_suspension>
#18_____testWidgets.<anonymous_closure>.<anonymous_closure>_
widget_tester.dart:168
<asynchronous_suspension>
#19_____TestWidgetsFlutterBinding._runTestBody_
binding.dart:1013
<asynchronous_suspension>
#20_____StackZoneSpecification._registerCallback.<anonymous_closure>_
stack_zone_specification.dart:114
<asynchronous_suspension>
_ProxyLayer:
test: _ScreenshotPaintingContext.toImage leak
identityHashCode: 232357060
context:
start: >
#6_______flutterEventToLeakTracker_
test_widgets.dart:24
#7______MemoryAllocations.dispatchObjectEvent_
memory_allocations.dart:241
#8______MemoryAllocations.dispatchObjectCreated_
memory_allocations.dart:275
#9______new_Layer_
layer.dart:143
#10_____new__ProxyLayer_(package:flutter/src/widgets/widget_inspector.dart)
widget_inspector.dart:1
#11______ScreenshotPaintingContext.toImage_
widget_inspector.dart:574
#12_____WidgetInspectorService.screenshot_
widget_inspector.dart:2096
#13______TestWidgetInspectorService.runTests.<anonymous_closure>_
widget_inspector_1_test.dart:45
<asynchronous_suspension>
#14_____testWidgetsWithLeakTracking.wrappedCallBack_
test_widgets.dart:127
<asynchronous_suspension>
#15_____testWidgets.<anonymous_closure>.<anonymous_closure>_
widget_tester.dart:168
<asynchronous_suspension>
#16_____TestWidgetsFlutterBinding._runTestBody_
binding.dart:1013
<asynchronous_suspension>
#17_____StackZoneSpecification._registerCallback.<anonymous_closure>_
stack_zone_specification.dart:114
<asynchronous_suspension>
package:matcher expect
expect
widget_tester.dart:458
_tearDownTestingWithLeakTracking
test_widgets.dart:82
===== asynchronous gap ===========================
dart:async _CustomZone.registerBinaryCallback
configureLeakTrackingTearDown.<fn>Flutter Doctor output
Doctor output
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• Flutter version 3.14.0-14.0.pre.580 on channel master at /Users/ksokolovskyi/dev/flutter_master
• Upstream repository [email protected]:ksokolovskyi/flutter.git
• FLUTTER_GIT_URL = [email protected]:ksokolovskyi/flutter.git
• Framework revision ba1d6147ba (28 hours ago), 2023-09-30 04:52:24 -0400
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• Android SDK at /Users/ksokolovskyi/Library/Android/sdk
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• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
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[✓] Connected device (2 available)
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• Chrome (web) • chrome • web-javascript • Google Chrome 117.0.5938.92
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• All expected network resources are available.
• No issues found!