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@flar flar commented Nov 13, 2025

Fixes a bug where executing a SaveLayer when the matrix is singular (non-invertible) will currently crash.

Fixes: #177603

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@flar flar requested a review from gaaclarke November 13, 2025 23:51
@github-actions github-actions bot added the engine flutter/engine related. See also e: labels. label Nov 13, 2025
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flar commented Nov 13, 2025

The check and comment failed to acknowledge that DLBuilder does not track the NOP status of the matrix which can also cause the Accumulate method to return false. See #178506

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Code Review

This pull request addresses a crash in SaveLayer when used with a non-invertible transform. The fix involves removing a DCHECK that was based on a faulty assumption, which is the correct approach. The PR also includes a good set of unit tests that cover various scenarios leading to non-invertible matrices, such as zero scaling and linear skewing, which will help prevent regressions. My review includes a few suggestions to improve code style by adhering to const correctness as per the project's C++ style guide.

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lgtm!

@flar flar added the autosubmit Merge PR when tree becomes green via auto submit App label Nov 14, 2025
@auto-submit auto-submit bot added this pull request to the merge queue Nov 14, 2025
Merged via the queue into flutter:master with commit b3d79da Nov 14, 2025
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@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Nov 14, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 15, 2025
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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 16, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 16, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 16, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 17, 2025
auto-submit bot pushed a commit to flutter/packages that referenced this pull request Nov 18, 2025
…#10455)

Manual roll Flutter from 9b5ad8031646 to cc14ef529014 (143 revisions)

Manual roll requested by tarrinneal@google.com

flutter/flutter@9b5ad80...cc14ef5

2025-11-17 bkonyi@google.com [ Widget Preview ] Fix crash when `widget_preview_scaffold/.dart_tool` doesn't exist (flutter/flutter#178662)
2025-11-17 william.oprandi@gmail.com Dev proxy correctly copy query parameters from original request (flutter/flutter#178162)
2025-11-17 engine-flutter-autoroll@skia.org Roll Dart SDK from ac5942fe75d0 to cf94632d94a1 (1 revision) (flutter/flutter#178664)
2025-11-17 116356835+AbdeMohlbi@users.noreply.github.com Improve code quality `FlutterViewTest.java`  (flutter/flutter#178594)
2025-11-17 katelovett@google.com Roll customer tests (flutter/flutter#178652)
2025-11-17 42980667+srivats22@users.noreply.github.com Corrects invalid Flutter wiki links (flutter/flutter#178158)
2025-11-17 sokolovskyi.konstantin@gmail.com Fix LateInitializationError in didChangeTextScaleFactor code example. (flutter/flutter#178375)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from d877de9fc23e to 84c83c0dfb4a (3 revisions) (flutter/flutter#178653)
2025-11-17 116356835+AbdeMohlbi@users.noreply.github.com Small refactor in `DartMessenger.java` to use method reference (flutter/flutter#178584)
2025-11-17 116356835+AbdeMohlbi@users.noreply.github.com fix typos in `PlatformChannel.java‎` docs (flutter/flutter#178589)
2025-11-17 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Enable UIScene Migration and update create templates (#178328)" (flutter/flutter#178665)
2025-11-17 116356835+AbdeMohlbi@users.noreply.github.com Remove unnecessary `String.valueOf` in `‎ListenableEditingState.java‎` (flutter/flutter#178597)
2025-11-17 116356835+AbdeMohlbi@users.noreply.github.com Update `Metadata.java‎` to use `getBytes` in a static context (flutter/flutter#178587)
2025-11-17 jason-simmons@users.noreply.github.com Reduce the data copying in CanvasPath related to the SkPathBuilder API migration (flutter/flutter#178512)
2025-11-17 engine-flutter-autoroll@skia.org Roll Packages from 799b62c to ce44ebb (10 revisions) (flutter/flutter#178649)
2025-11-17 15619084+vashworth@users.noreply.github.com Enable UIScene Migration and update create templates (flutter/flutter#178328)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from 5fb44352b232 to d877de9fc23e (1 revision) (flutter/flutter#178647)
2025-11-17 15619084+vashworth@users.noreply.github.com Revert "Separate copying dsym into its own target (#178261)" (flutter/flutter#178545)
2025-11-17 mdebbar@google.com [web] Reduce Skwasm test shards to 2 (flutter/flutter#178239)
2025-11-17 engine-flutter-autoroll@skia.org Roll Dart SDK from ee793f732959 to ac5942fe75d0 (1 revision) (flutter/flutter#178637)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from b30859d35b89 to 5fb44352b232 (1 revision) (flutter/flutter#178636)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from 5b7f8f61528e to b30859d35b89 (1 revision) (flutter/flutter#178634)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from aad0515710a9 to 5b7f8f61528e (7 revisions) (flutter/flutter#178631)
2025-11-17 engine-flutter-autoroll@skia.org Roll Skia from 761e1fe67e15 to aad0515710a9 (1 revision) (flutter/flutter#178624)
2025-11-16 engine-flutter-autoroll@skia.org Roll Skia from 5f9157717150 to 761e1fe67e15 (1 revision) (flutter/flutter#178614)
2025-11-16 engine-flutter-autoroll@skia.org Roll Skia from 1b435b65e754 to 5f9157717150 (1 revision) (flutter/flutter#178612)
2025-11-16 engine-flutter-autoroll@skia.org Roll Dart SDK from dffc5f3f9be6 to ee793f732959 (1 revision) (flutter/flutter#178607)
2025-11-16 engine-flutter-autoroll@skia.org Roll Skia from ce2168cf2b6c to 1b435b65e754 (1 revision) (flutter/flutter#178604)
2025-11-15 engine-flutter-autoroll@skia.org Roll Dart SDK from 50eca21d80c4 to dffc5f3f9be6 (1 revision) (flutter/flutter#178603)
2025-11-15 matej.knopp@gmail.com [macOS] Implement dialog window (flutter/flutter#176893)
2025-11-15 engine-flutter-autoroll@skia.org Roll Dart SDK from f6f88ed5e5a1 to 50eca21d80c4 (1 revision) (flutter/flutter#178599)
2025-11-15 engine-flutter-autoroll@skia.org Roll Dart SDK from 9eda5b525ca9 to f6f88ed5e5a1 (1 revision) (flutter/flutter#178576)
2025-11-15 engine-flutter-autoroll@skia.org Roll Skia from c5c3399b3a84 to ce2168cf2b6c (1 revision) (flutter/flutter#178577)
2025-11-15 bernaferrari2@gmail.com Add a `RepeatingAnimationBuilder` API (flutter/flutter#174014)
2025-11-15 engine-flutter-autoroll@skia.org Roll Dart SDK from 486be9c17488 to 9eda5b525ca9 (1 revision) (flutter/flutter#178562)
2025-11-15 engine-flutter-autoroll@skia.org Roll Skia from f5d29842bf45 to c5c3399b3a84 (1 revision) (flutter/flutter#178559)
2025-11-14 engine-flutter-autoroll@skia.org Roll Skia from f58b1b8052a2 to f5d29842bf45 (3 revisions) (flutter/flutter#178556)
2025-11-14 engine-flutter-autoroll@skia.org Roll Dart SDK from c6c5f6c169a9 to 486be9c17488 (1 revision) (flutter/flutter#178555)
2025-11-14 bkonyi@google.com [ Widget Preview ] Gracefully handle unexpected analysis context disposal (flutter/flutter#178550)
2025-11-14 codefu@google.com docs: Add documentation for running devicelab tests in a PR (flutter/flutter#178554)
2025-11-14 matt.boetger@gmail.com [Reland] Generate new Gradle lockfiles and delete ignore files (flutter/flutter#178553)
2025-11-14 flar@google.com Fix crash when doing a SaveLayer under a non-invertible transform (flutter/flutter#178507)
2025-11-14 matt.boetger@gmail.com [Reland] Generate ignore lockfiles and Update Android Embedder Dependencies (flutter/flutter#178538)
2025-11-14 engine-flutter-autoroll@skia.org Roll Skia from 4c02d9fc79c1 to f58b1b8052a2 (1 revision) (flutter/flutter#178543)
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[impeller] crash in save layer when contents scaled by zero

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