fix(web_ui): handle non-invertible matrices in ImageFilter.matrix#181742
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In CanvasKit, `MakeMatrixTransform` returns null if the matrix is non-invertible (e.g., all zeros or zero scale). Previously, the web engine assumed this would always return a valid object, leading to a crash when calling methods like `delete()` or `getOutputBounds()` on the null result. This change: - Updates `MakeMatrixTransform` signature to allow returning null. - Gracefully handles null filters in `CkMatrixImageFilter` by skipping the borrow callback. - Defaults `filterBounds` to `ui.Rect.zero` when the filter is null, indicating that no content is rendered. - Adds a comprehensive test suite to ensure non-invertible matrices do not cause crashes during scene building or painting.
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This pull request addresses a crash caused by non-invertible matrices in ImageFilter.matrix. The fix correctly handles the nullable return value from MakeMatrixTransform in CanvasKit. The changes are well-tested with a new suite of tests covering non-invertible matrix scenarios. My feedback includes a minor suggestion to improve code robustness.
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Roll Flutter from bf701fefec86 to f916dd6887bf (44 revisions) flutter/flutter@bf701fe...f916dd6 2026-02-05 nemeth@marcell.it Implement macOS wide gamut (Display P3) support (flutter/flutter#181769) 2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from d23ecfbfdff9 to 8543ce512d5c (3 revisions) (flutter/flutter#181923) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 8001c99d952b to 8f778ffd318b (3 revisions) (flutter/flutter#181927) 2026-02-04 jason-simmons@users.noreply.github.com Re-enable AddressSanitizer on the linux_unopt builder (flutter/flutter#181741) 2026-02-04 1063596+reidbaker@users.noreply.github.com Add exception to log message in ContentSizingFlag.java (flutter/flutter#181813) 2026-02-04 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181925) 2026-02-04 nshahan@google.com [flutter_tools] Deprecate web hot reload flag (flutter/flutter#181884) 2026-02-04 magder@google.com Marks platform_views_scroll_perf_impeller__timeline_summary unflaky (flutter/flutter#181649) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 204db085d970 to 8001c99d952b (1 revision) (flutter/flutter#181902) 2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from f37a22506eb4 to d23ecfbfdff9 (23 revisions) (flutter/flutter#181915) 2026-02-04 jason-simmons@users.noreply.github.com In the Web codec tests, skip an undecodable image that is used to test a Skia error handling code path. (flutter/flutter#181870) 2026-02-04 engine-flutter-autoroll@skia.org Roll Packages from 5b1bea8 to 3bddf2c (5 revisions) (flutter/flutter#181918) 2026-02-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from UmQaaNuhkiuE8Dzug... to J2QdLcY2gyt4NP_xV... (flutter/flutter#181893) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 54322a0b1109 to 204db085d970 (3 revisions) (flutter/flutter#181890) 2026-02-04 nurdaulet.97@gmail.com Cleanup cross imports (flutter/flutter#181807) 2026-02-04 kazbek.sultanov.doc@gmail.com [Material] Remove Material import from backdrop_filter_test.dart widget tests (flutter/flutter#181386) 2026-02-04 kazbek.sultanov.doc@gmail.com Move CheckedModeBanner tests to material and remove Material import from widgets banner_test (flutter/flutter#181261) 2026-02-04 git@reb0.org feat: Pass parameters from DropdownMenuFormField to DropDownMenu (flutter/flutter#181373) 2026-02-04 116356835+AbdeMohlbi@users.noreply.github.com Remove `Config complete` log when using `flutter build apk --config-only` (flutter/flutter#181864) 2026-02-04 flar@google.com [Impeller] Fix flattening of very large zoomed curves with tiny stroke widths (flutter/flutter#181505) 2026-02-03 prbillingsley89@gmail.com Propagates Overlay's MediaQueryData to OverlayPortal child (flutter/flutter#181579) 2026-02-03 ahmedsameha1@gmail.com Make sure that an AnimatedScale doesn't crash in 0x0 environment (flutter/flutter#181481) 2026-02-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 56294a92d5cc to 54322a0b1109 (1 revision) (flutter/flutter#181872) 2026-02-03 zemanux@users.noreply.github.com Fix decorated box (flutter/flutter#179802) 2026-02-03 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181871) 2026-02-03 70534390+Erengun@users.noreply.github.com Remove Material library dependency from expansible_test.dart (flutter/flutter#181657) 2026-02-03 evanwall@buffalo.edu Organize and update fragment shader uniform tests. (flutter/flutter#181822) 2026-02-03 1961493+harryterkelsen@users.noreply.github.com fix(web_ui): handle non-invertible matrices in ImageFilter.matrix (flutter/flutter#181742) 2026-02-03 nhan13574@gmail.com Remove unnecessary Material import from cupertino/slider_test.dart (flutter/flutter#180957) 2026-02-03 15619084+vashworth@users.noreply.github.com Remove the Flutter.xcframework as a swift dependency (flutter/flutter#181739) 2026-02-03 matt.kosarek@canonical.com feature: implementation of tooltips in the `_TestWindowingOwner` and minor bugfixes to the multiple windows example app (flutter/flutter#181510) 2026-02-03 737941+loic-sharma@users.noreply.github.com [Web] Fix flt-platform-view comment (flutter/flutter#181576) 2026-02-03 fluttergithubbot@gmail.com Marks Linux_pixel_7pro android_verified_input_test to be unflaky (flutter/flutter#179120) 2026-02-03 34871572+gmackall@users.noreply.github.com Unmark `hybrid_android_views_integration_test` as bringup (flutter/flutter#181628) 2026-02-03 brackenavaron@gmail.com Remove material from sliver_tree_test.dart (flutter/flutter#181415) 2026-02-03 34871572+gmackall@users.noreply.github.com Make `android_plugin_new_output_dir_test` only build release (flutter/flutter#181677) 2026-02-03 737941+loic-sharma@users.noreply.github.com Roll customer tests (flutter/flutter#181825) 2026-02-03 41432658+jonathimer@users.noreply.github.com Add Linux Foundation Health Score badge to README (flutter/flutter#175587) 2026-02-03 116356835+AbdeMohlbi@users.noreply.github.com Remove unused getters on AndroidProject class (flutter/flutter#181860) 2026-02-03 47866232+chunhtai@users.noreply.github.com Adds batch release doc for flutter/package (flutter/flutter#181676) 2026-02-03 bkonyi@google.com [ Tool ] Don't use `globals.platform` in `getFlutterRoot()` (flutter/flutter#181859) 2026-02-03 engine-flutter-autoroll@skia.org Roll Packages from 837dbbd to 5b1bea8 (10 revisions) (flutter/flutter#181857) 2026-02-03 brackenavaron@gmail.com Remove material from basic_test.dart (flutter/flutter#181444) 2026-02-03 bkonyi@google.com [ Tool ] Fix regression introduced in flutter/flutter#181421 (flutter/flutter#181826) If this roll has caused a breakage, revert this CL and stop the roller ...
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…utter#181742) In CanvasKit, `MakeMatrixTransform` returns null if the matrix is non-invertible (e.g., all zeros or zero scale). Previously, the web engine assumed this would always return a valid object, leading to a crash when calling methods like `delete()` or `getOutputBounds()` on the null result. This change: - Updates `MakeMatrixTransform` signature to allow returning null. - Gracefully handles null filters in `CkMatrixImageFilter` by skipping the borrow callback. - Defaults `filterBounds` to `ui.Rect.zero` when the filter is null, indicating that no content is rendered. - Adds a comprehensive test suite to ensure non-invertible matrices do not cause crashes during scene building or painting. Fixes flutter#181411 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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…utter#181742) In CanvasKit, `MakeMatrixTransform` returns null if the matrix is non-invertible (e.g., all zeros or zero scale). Previously, the web engine assumed this would always return a valid object, leading to a crash when calling methods like `delete()` or `getOutputBounds()` on the null result. This change: - Updates `MakeMatrixTransform` signature to allow returning null. - Gracefully handles null filters in `CkMatrixImageFilter` by skipping the borrow callback. - Defaults `filterBounds` to `ui.Rect.zero` when the filter is null, indicating that no content is rendered. - Adds a comprehensive test suite to ensure non-invertible matrices do not cause crashes during scene building or painting. Fixes flutter#181411 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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…utter#181742) In CanvasKit, `MakeMatrixTransform` returns null if the matrix is non-invertible (e.g., all zeros or zero scale). Previously, the web engine assumed this would always return a valid object, leading to a crash when calling methods like `delete()` or `getOutputBounds()` on the null result. This change: - Updates `MakeMatrixTransform` signature to allow returning null. - Gracefully handles null filters in `CkMatrixImageFilter` by skipping the borrow callback. - Defaults `filterBounds` to `ui.Rect.zero` when the filter is null, indicating that no content is rendered. - Adds a comprehensive test suite to ensure non-invertible matrices do not cause crashes during scene building or painting. Fixes flutter#181411 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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…r#10967) Roll Flutter from bf701fefec86 to f916dd6887bf (44 revisions) flutter/flutter@bf701fe...f916dd6 2026-02-05 nemeth@marcell.it Implement macOS wide gamut (Display P3) support (flutter/flutter#181769) 2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from d23ecfbfdff9 to 8543ce512d5c (3 revisions) (flutter/flutter#181923) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 8001c99d952b to 8f778ffd318b (3 revisions) (flutter/flutter#181927) 2026-02-04 jason-simmons@users.noreply.github.com Re-enable AddressSanitizer on the linux_unopt builder (flutter/flutter#181741) 2026-02-04 1063596+reidbaker@users.noreply.github.com Add exception to log message in ContentSizingFlag.java (flutter/flutter#181813) 2026-02-04 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181925) 2026-02-04 nshahan@google.com [flutter_tools] Deprecate web hot reload flag (flutter/flutter#181884) 2026-02-04 magder@google.com Marks platform_views_scroll_perf_impeller__timeline_summary unflaky (flutter/flutter#181649) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 204db085d970 to 8001c99d952b (1 revision) (flutter/flutter#181902) 2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from f37a22506eb4 to d23ecfbfdff9 (23 revisions) (flutter/flutter#181915) 2026-02-04 jason-simmons@users.noreply.github.com In the Web codec tests, skip an undecodable image that is used to test a Skia error handling code path. (flutter/flutter#181870) 2026-02-04 engine-flutter-autoroll@skia.org Roll Packages from 5b1bea8 to 3bddf2c (5 revisions) (flutter/flutter#181918) 2026-02-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from UmQaaNuhkiuE8Dzug... to J2QdLcY2gyt4NP_xV... (flutter/flutter#181893) 2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 54322a0b1109 to 204db085d970 (3 revisions) (flutter/flutter#181890) 2026-02-04 nurdaulet.97@gmail.com Cleanup cross imports (flutter/flutter#181807) 2026-02-04 kazbek.sultanov.doc@gmail.com [Material] Remove Material import from backdrop_filter_test.dart widget tests (flutter/flutter#181386) 2026-02-04 kazbek.sultanov.doc@gmail.com Move CheckedModeBanner tests to material and remove Material import from widgets banner_test (flutter/flutter#181261) 2026-02-04 git@reb0.org feat: Pass parameters from DropdownMenuFormField to DropDownMenu (flutter/flutter#181373) 2026-02-04 116356835+AbdeMohlbi@users.noreply.github.com Remove `Config complete` log when using `flutter build apk --config-only` (flutter/flutter#181864) 2026-02-04 flar@google.com [Impeller] Fix flattening of very large zoomed curves with tiny stroke widths (flutter/flutter#181505) 2026-02-03 prbillingsley89@gmail.com Propagates Overlay's MediaQueryData to OverlayPortal child (flutter/flutter#181579) 2026-02-03 ahmedsameha1@gmail.com Make sure that an AnimatedScale doesn't crash in 0x0 environment (flutter/flutter#181481) 2026-02-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 56294a92d5cc to 54322a0b1109 (1 revision) (flutter/flutter#181872) 2026-02-03 zemanux@users.noreply.github.com Fix decorated box (flutter/flutter#179802) 2026-02-03 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181871) 2026-02-03 70534390+Erengun@users.noreply.github.com Remove Material library dependency from expansible_test.dart (flutter/flutter#181657) 2026-02-03 evanwall@buffalo.edu Organize and update fragment shader uniform tests. (flutter/flutter#181822) 2026-02-03 1961493+harryterkelsen@users.noreply.github.com fix(web_ui): handle non-invertible matrices in ImageFilter.matrix (flutter/flutter#181742) 2026-02-03 nhan13574@gmail.com Remove unnecessary Material import from cupertino/slider_test.dart (flutter/flutter#180957) 2026-02-03 15619084+vashworth@users.noreply.github.com Remove the Flutter.xcframework as a swift dependency (flutter/flutter#181739) 2026-02-03 matt.kosarek@canonical.com feature: implementation of tooltips in the `_TestWindowingOwner` and minor bugfixes to the multiple windows example app (flutter/flutter#181510) 2026-02-03 737941+loic-sharma@users.noreply.github.com [Web] Fix flt-platform-view comment (flutter/flutter#181576) 2026-02-03 fluttergithubbot@gmail.com Marks Linux_pixel_7pro android_verified_input_test to be unflaky (flutter/flutter#179120) 2026-02-03 34871572+gmackall@users.noreply.github.com Unmark `hybrid_android_views_integration_test` as bringup (flutter/flutter#181628) 2026-02-03 brackenavaron@gmail.com Remove material from sliver_tree_test.dart (flutter/flutter#181415) 2026-02-03 34871572+gmackall@users.noreply.github.com Make `android_plugin_new_output_dir_test` only build release (flutter/flutter#181677) 2026-02-03 737941+loic-sharma@users.noreply.github.com Roll customer tests (flutter/flutter#181825) 2026-02-03 41432658+jonathimer@users.noreply.github.com Add Linux Foundation Health Score badge to README (flutter/flutter#175587) 2026-02-03 116356835+AbdeMohlbi@users.noreply.github.com Remove unused getters on AndroidProject class (flutter/flutter#181860) 2026-02-03 47866232+chunhtai@users.noreply.github.com Adds batch release doc for flutter/package (flutter/flutter#181676) 2026-02-03 bkonyi@google.com [ Tool ] Don't use `globals.platform` in `getFlutterRoot()` (flutter/flutter#181859) 2026-02-03 engine-flutter-autoroll@skia.org Roll Packages from 837dbbd to 5b1bea8 (10 revisions) (flutter/flutter#181857) 2026-02-03 brackenavaron@gmail.com Remove material from basic_test.dart (flutter/flutter#181444) 2026-02-03 bkonyi@google.com [ Tool ] Fix regression introduced in flutter/flutter#181421 (flutter/flutter#181826) If this roll has caused a breakage, revert this CL and stop the roller ...
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In CanvasKit,
MakeMatrixTransformreturns null if the matrix is non-invertible (e.g., all zeros or zero scale). Previously, the web engine assumed this would always return a valid object, leading to a crash when calling methods likedelete()orgetOutputBounds()on the null result.This change:
MakeMatrixTransformsignature to allow returning null.CkMatrixImageFilterby skipping the borrow callback.filterBoundstoui.Rect.zerowhen the filter is null, indicating that no content is rendered.Fixes #181411
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.
Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the
gemini-code-assistbot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.