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Make sure that an AnimatedCrossFade does not crash in 0x0 environment - #180088
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This pull request adds a regression test for an issue where AnimatedCrossFade would crash when given a zero size. The test correctly reproduces the scenario. I've suggested an improvement to make the test more robust by also verifying that the cross-fade animation does not crash in this zero-size environment, as the original crash was related to AnimatedSize which is active during the animation.
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| testWidgets('AnimatedCrossFade does not crash at zero area', (WidgetTester tester) async { | ||
| await tester.pumpWidget( | ||
| const Directionality( | ||
| textDirection: TextDirection.ltr, | ||
| child: Center( | ||
| child: SizedBox.shrink( | ||
| child: AnimatedCrossFade( | ||
| firstChild: Text('X'), | ||
| secondChild: Text('Y'), | ||
| crossFadeState: CrossFadeState.showFirst, | ||
| duration: Duration(seconds: 1), | ||
| ), | ||
| ), | ||
| ), | ||
| ), | ||
| ); | ||
| expect(tester.getSize(find.byType(AnimatedCrossFade)), Size.zero); | ||
| }); |
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The test is good as it verifies the initial state doesn't crash. However, to make it more robust, it would be beneficial to also test the cross-fade animation itself. The original crash was related to RenderAnimatedSize, which is most active during the animation phase. This ensures that the widget is safe not just in its static states but also during transitions in a zero-size environment.
You could add the following to the test:
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: SizedBox.shrink(
child: AnimatedCrossFade(
firstChild: const Text('X'),
secondChild: const Text('Y'),
crossFadeState: CrossFadeState.showSecond,
duration: Duration(seconds: 1),
),
),
),
),
);
await tester.pump(const Duration(milliseconds: 500));
expect(tester.getSize(find.byType(AnimatedCrossFade)), Size.zero);Also, consider making the Text widgets const for minor performance improvement.
victorsanni
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dkwingsmt
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Checklist:
- The test is in the correct file
- The test name goes “does not crash at zero area”
- The target widget is wrapped by
Center(or is fullscreen) - The target widget does not have an overlay, or the overlay is tested
- The target widget is expected to have a size of exactly
Size.zero
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Roll Flutter from 6ff7f30 to 60d8165 (32 revisions) flutter/flutter@6ff7f30...60d8165 2025-12-29 [email protected] Roll Fuchsia Linux SDK from xn1U9DUFEpB4f6vG-... to DdllqZRZYriOd7Q8v... (flutter/flutter#180356) 2025-12-28 [email protected] Roll Dart SDK from 17d51009282c to df175c998021 (1 revision) (flutter/flutter#180349) 2025-12-28 [email protected] Roll Dart SDK from d4a92c2c69bf to 17d51009282c (1 revision) (flutter/flutter#180346) 2025-12-28 [email protected] Roll Fuchsia Linux SDK from jVkEEUxyGeemuu2HE... to xn1U9DUFEpB4f6vG-... (flutter/flutter#180343) 2025-12-27 [email protected] Roll Dart SDK from 3b84125003a1 to d4a92c2c69bf (1 revision) (flutter/flutter#180331) 2025-12-27 [email protected] Roll Skia from e6e535aec613 to c29a475066f5 (1 revision) (flutter/flutter#180322) 2025-12-27 [email protected] Make sure that a WidgetsApp doesn't crash in 0x0 environment (flutter/flutter#180224) 2025-12-27 [email protected] Make sure that an AnimatedSize doesn't crash in 0x0 environment (flutter/flutter#180174) 2025-12-27 [email protected] Make sure that an AnimatedGrid doesn't crash in 0x0 environment (flutter/flutter#180159) 2025-12-27 [email protected] Make sure that an AnimatedCrossFade does not crash in 0x0 environment (flutter/flutter#180088) 2025-12-27 [email protected] Make sure that an AnimatedList doesn't crash in 0x0 environment (flutter/flutter#180123) 2025-12-26 [email protected] Roll Fuchsia Linux SDK from mZlbuHta7S71Quawk... to jVkEEUxyGeemuu2HE... (flutter/flutter#180317) 2025-12-26 [email protected] Roll Dart SDK from 6b2c3716be54 to 3b84125003a1 (1 revision) (flutter/flutter#180316) 2025-12-26 [email protected] Roll Dart SDK from 18f6751c5ccc to 6b2c3716be54 (1 revision) (flutter/flutter#180252) 2025-12-26 [email protected] Roll Skia from 07c59737d265 to e6e535aec613 (1 revision) (flutter/flutter#180303) 2025-12-25 [email protected] Roll Fuchsia Linux SDK from 2q71ydbnIhmBUiNOF... to mZlbuHta7S71Quawk... (flutter/flutter#180290) 2025-12-25 [email protected] Roll Skia from 6d0a1b03e9c7 to 07c59737d265 (1 revision) (flutter/flutter#180289) 2025-12-25 [email protected] Roll Skia from 2b5d93b62a3f to 6d0a1b03e9c7 (1 revision) (flutter/flutter#180279) 2025-12-25 [email protected] Roll Skia from 3544942c9d42 to 2b5d93b62a3f (1 revision) (flutter/flutter#180276) 2025-12-24 [email protected] Roll Fuchsia Linux SDK from 5EgkVbjGVZmCFPdtR... to 2q71ydbnIhmBUiNOF... (flutter/flutter#180274) 2025-12-24 [email protected] Roll Packages from 5e3a766 to 2164da9 (4 revisions) (flutter/flutter#180271) 2025-12-24 [email protected] Roll Skia from 988a48f7a944 to 3544942c9d42 (1 revision) (flutter/flutter#180267) 2025-12-24 [email protected] Marks Mac_arm64_mokey native_assets_android to be unflaky (flutter/flutter#180263) 2025-12-24 [email protected] Roll Skia from 51a05ce05880 to 988a48f7a944 (1 revision) (flutter/flutter#180256) 2025-12-24 [email protected] fix: exclude semantics for disabled dates (flutter/flutter#178981) 2025-12-24 [email protected] Roll Skia from 7fe9b93153f8 to 51a05ce05880 (1 revision) (flutter/flutter#180253) 2025-12-24 [email protected] Enhance documentation for sortable column behavior (flutter/flutter#180011) 2025-12-24 [email protected] Roll Skia from a0f18947bc1b to 7fe9b93153f8 (4 revisions) (flutter/flutter#180247) 2025-12-23 [email protected] Roll Skia from bdb147ae3040 to a0f18947bc1b (2 revisions) (flutter/flutter#180241) 2025-12-23 [email protected] Roll Dart SDK from 94b05f717ba3 to 18f6751c5ccc (1 revision) (flutter/flutter#180236) 2025-12-23 [email protected] docs: clarify dropdown menu text clearing (flutter/flutter#179676) 2025-12-23 [email protected] New optimized general convex path shadow algorithm (flutter/flutter#178370) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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Roll Flutter from 6ff7f30 to 60d8165 (32 revisions) flutter/flutter@6ff7f30...60d8165 2025-12-29 [email protected] Roll Fuchsia Linux SDK from xn1U9DUFEpB4f6vG-... to DdllqZRZYriOd7Q8v... (flutter/flutter#180356) 2025-12-28 [email protected] Roll Dart SDK from 17d51009282c to df175c998021 (1 revision) (flutter/flutter#180349) 2025-12-28 [email protected] Roll Dart SDK from d4a92c2c69bf to 17d51009282c (1 revision) (flutter/flutter#180346) 2025-12-28 [email protected] Roll Fuchsia Linux SDK from jVkEEUxyGeemuu2HE... to xn1U9DUFEpB4f6vG-... (flutter/flutter#180343) 2025-12-27 [email protected] Roll Dart SDK from 3b84125003a1 to d4a92c2c69bf (1 revision) (flutter/flutter#180331) 2025-12-27 [email protected] Roll Skia from e6e535aec613 to c29a475066f5 (1 revision) (flutter/flutter#180322) 2025-12-27 [email protected] Make sure that a WidgetsApp doesn't crash in 0x0 environment (flutter/flutter#180224) 2025-12-27 [email protected] Make sure that an AnimatedSize doesn't crash in 0x0 environment (flutter/flutter#180174) 2025-12-27 [email protected] Make sure that an AnimatedGrid doesn't crash in 0x0 environment (flutter/flutter#180159) 2025-12-27 [email protected] Make sure that an AnimatedCrossFade does not crash in 0x0 environment (flutter/flutter#180088) 2025-12-27 [email protected] Make sure that an AnimatedList doesn't crash in 0x0 environment (flutter/flutter#180123) 2025-12-26 [email protected] Roll Fuchsia Linux SDK from mZlbuHta7S71Quawk... to jVkEEUxyGeemuu2HE... (flutter/flutter#180317) 2025-12-26 [email protected] Roll Dart SDK from 6b2c3716be54 to 3b84125003a1 (1 revision) (flutter/flutter#180316) 2025-12-26 [email protected] Roll Dart SDK from 18f6751c5ccc to 6b2c3716be54 (1 revision) (flutter/flutter#180252) 2025-12-26 [email protected] Roll Skia from 07c59737d265 to e6e535aec613 (1 revision) (flutter/flutter#180303) 2025-12-25 [email protected] Roll Fuchsia Linux SDK from 2q71ydbnIhmBUiNOF... to mZlbuHta7S71Quawk... (flutter/flutter#180290) 2025-12-25 [email protected] Roll Skia from 6d0a1b03e9c7 to 07c59737d265 (1 revision) (flutter/flutter#180289) 2025-12-25 [email protected] Roll Skia from 2b5d93b62a3f to 6d0a1b03e9c7 (1 revision) (flutter/flutter#180279) 2025-12-25 [email protected] Roll Skia from 3544942c9d42 to 2b5d93b62a3f (1 revision) (flutter/flutter#180276) 2025-12-24 [email protected] Roll Fuchsia Linux SDK from 5EgkVbjGVZmCFPdtR... to 2q71ydbnIhmBUiNOF... (flutter/flutter#180274) 2025-12-24 [email protected] Roll Packages from 5e3a766 to 2164da9 (4 revisions) (flutter/flutter#180271) 2025-12-24 [email protected] Roll Skia from 988a48f7a944 to 3544942c9d42 (1 revision) (flutter/flutter#180267) 2025-12-24 [email protected] Marks Mac_arm64_mokey native_assets_android to be unflaky (flutter/flutter#180263) 2025-12-24 [email protected] Roll Skia from 51a05ce05880 to 988a48f7a944 (1 revision) (flutter/flutter#180256) 2025-12-24 [email protected] fix: exclude semantics for disabled dates (flutter/flutter#178981) 2025-12-24 [email protected] Roll Skia from 7fe9b93153f8 to 51a05ce05880 (1 revision) (flutter/flutter#180253) 2025-12-24 [email protected] Enhance documentation for sortable column behavior (flutter/flutter#180011) 2025-12-24 [email protected] Roll Skia from a0f18947bc1b to 7fe9b93153f8 (4 revisions) (flutter/flutter#180247) 2025-12-23 [email protected] Roll Skia from bdb147ae3040 to a0f18947bc1b (2 revisions) (flutter/flutter#180241) 2025-12-23 [email protected] Roll Dart SDK from 94b05f717ba3 to 18f6751c5ccc (1 revision) (flutter/flutter#180236) 2025-12-23 [email protected] docs: clarify dropdown menu text clearing (flutter/flutter#179676) 2025-12-23 [email protected] New optimized general convex path shadow algorithm (flutter/flutter#178370) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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Roll Flutter from 6ff7f30 to 60d8165 (32 revisions) flutter/flutter@6ff7f30...60d8165 2025-12-29 [email protected] Roll Fuchsia Linux SDK from xn1U9DUFEpB4f6vG-... to DdllqZRZYriOd7Q8v... (flutter/flutter#180356) 2025-12-28 [email protected] Roll Dart SDK from 17d51009282c to df175c998021 (1 revision) (flutter/flutter#180349) 2025-12-28 [email protected] Roll Dart SDK from d4a92c2c69bf to 17d51009282c (1 revision) (flutter/flutter#180346) 2025-12-28 [email protected] Roll Fuchsia Linux SDK from jVkEEUxyGeemuu2HE... to xn1U9DUFEpB4f6vG-... (flutter/flutter#180343) 2025-12-27 [email protected] Roll Dart SDK from 3b84125003a1 to d4a92c2c69bf (1 revision) (flutter/flutter#180331) 2025-12-27 [email protected] Roll Skia from e6e535aec613 to c29a475066f5 (1 revision) (flutter/flutter#180322) 2025-12-27 [email protected] Make sure that a WidgetsApp doesn't crash in 0x0 environment (flutter/flutter#180224) 2025-12-27 [email protected] Make sure that an AnimatedSize doesn't crash in 0x0 environment (flutter/flutter#180174) 2025-12-27 [email protected] Make sure that an AnimatedGrid doesn't crash in 0x0 environment (flutter/flutter#180159) 2025-12-27 [email protected] Make sure that an AnimatedCrossFade does not crash in 0x0 environment (flutter/flutter#180088) 2025-12-27 [email protected] Make sure that an AnimatedList doesn't crash in 0x0 environment (flutter/flutter#180123) 2025-12-26 [email protected] Roll Fuchsia Linux SDK from mZlbuHta7S71Quawk... to jVkEEUxyGeemuu2HE... (flutter/flutter#180317) 2025-12-26 [email protected] Roll Dart SDK from 6b2c3716be54 to 3b84125003a1 (1 revision) (flutter/flutter#180316) 2025-12-26 [email protected] Roll Dart SDK from 18f6751c5ccc to 6b2c3716be54 (1 revision) (flutter/flutter#180252) 2025-12-26 [email protected] Roll Skia from 07c59737d265 to e6e535aec613 (1 revision) (flutter/flutter#180303) 2025-12-25 [email protected] Roll Fuchsia Linux SDK from 2q71ydbnIhmBUiNOF... to mZlbuHta7S71Quawk... (flutter/flutter#180290) 2025-12-25 [email protected] Roll Skia from 6d0a1b03e9c7 to 07c59737d265 (1 revision) (flutter/flutter#180289) 2025-12-25 [email protected] Roll Skia from 2b5d93b62a3f to 6d0a1b03e9c7 (1 revision) (flutter/flutter#180279) 2025-12-25 [email protected] Roll Skia from 3544942c9d42 to 2b5d93b62a3f (1 revision) (flutter/flutter#180276) 2025-12-24 [email protected] Roll Fuchsia Linux SDK from 5EgkVbjGVZmCFPdtR... to 2q71ydbnIhmBUiNOF... (flutter/flutter#180274) 2025-12-24 [email protected] Roll Packages from 5e3a766 to 2164da9 (4 revisions) (flutter/flutter#180271) 2025-12-24 [email protected] Roll Skia from 988a48f7a944 to 3544942c9d42 (1 revision) (flutter/flutter#180267) 2025-12-24 [email protected] Marks Mac_arm64_mokey native_assets_android to be unflaky (flutter/flutter#180263) 2025-12-24 [email protected] Roll Skia from 51a05ce05880 to 988a48f7a944 (1 revision) (flutter/flutter#180256) 2025-12-24 [email protected] fix: exclude semantics for disabled dates (flutter/flutter#178981) 2025-12-24 [email protected] Roll Skia from 7fe9b93153f8 to 51a05ce05880 (1 revision) (flutter/flutter#180253) 2025-12-24 [email protected] Enhance documentation for sortable column behavior (flutter/flutter#180011) 2025-12-24 [email protected] Roll Skia from a0f18947bc1b to 7fe9b93153f8 (4 revisions) (flutter/flutter#180247) 2025-12-23 [email protected] Roll Skia from bdb147ae3040 to a0f18947bc1b (2 revisions) (flutter/flutter#180241) 2025-12-23 [email protected] Roll Dart SDK from 94b05f717ba3 to 18f6751c5ccc (1 revision) (flutter/flutter#180236) 2025-12-23 [email protected] docs: clarify dropdown menu text clearing (flutter/flutter#179676) 2025-12-23 [email protected] New optimized general convex path shadow algorithm (flutter/flutter#178370) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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This is my attempt to handle #6537 for the AnimatedCrossFade widget.