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when resetting FlutterPlatformViewsController, clear out some additional internal state to prevent it from carrying over across a Hot Restart #164456

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merged 2 commits into from
Mar 5, 2025

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PaulAllanSturm
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@PaulAllanSturm PaulAllanSturm commented Mar 2, 2025

When performing a Hot Restart on iOS in an app that uses PlatformViews, a "recreating_view" PlatformException can be thrown. This happens because some of the state of FlutterPlatformViewsController is not cleared as part of the Hot Restart. Specifically, self.previousCompositionOrder will have its previous value from before the Hot Restart. The fix here clears that state as part of the Hot Restart.

Fixes #163935

Pre-launch Checklist

If you need help, consider asking for advice on the #hackers-new channel on Discord.

…nal internal state to prevent it from carrying over across a Hot Restart
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!).

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

@github-actions github-actions bot added platform-ios iOS applications specifically engine flutter/engine repository. See also e: labels. team-ios Owned by iOS platform team labels Mar 2, 2025
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unit test added

@jonahwilliams jonahwilliams requested a review from cbracken March 3, 2025 23:39
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lgtm! Thanks for the fix.

Technically, the style guide says we should end line comments with a period, but your code is consistent with the surrounding code in the file. I can send a followup patch that cleans up the iOS embedder tests as a whole.

@cbracken cbracken requested a review from hellohuanlin March 4, 2025 22:08
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LGTM!

@cbracken cbracken added the autosubmit Merge PR when tree becomes green via auto submit App label Mar 4, 2025
@auto-submit auto-submit bot added this pull request to the merge queue Mar 5, 2025
Merged via the queue into flutter:master with commit 99d265e Mar 5, 2025
175 of 176 checks passed
@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Mar 5, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 5, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 6, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 6, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Mar 6, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
auto-submit bot pushed a commit to flutter/packages that referenced this pull request Mar 6, 2025
flutter/flutter@2578d97...321fbc0

2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from fefecd49e03a to ccd8cc23aa94 (1 revision) (flutter/flutter#164712)
2025-03-06 mdebbar@google.com [web] Detect scrollable semantics nodes more reliably (flutter/flutter#164491)
2025-03-06 matt.kosarek@canonical.com [windows] wire the focus request and the focus events through the Windows platform (flutter/flutter#164296)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 02897747c7d5 to fefecd49e03a (1 revision) (flutter/flutter#164701)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from e315b0ab7c84 to 02897747c7d5 (1 revision) (flutter/flutter#164677)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 0c3880f94970 to e315b0ab7c84 (1 revision) (flutter/flutter#164669)
2025-03-06 jonahwilliams@google.com [Impeller] use device private on non-iOS devices. (flutter/flutter#164601)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 43294a662fd0 to 0c3880f94970 (1 revision) (flutter/flutter#164661)
2025-03-05 codefu@google.com Add a workflow (only triggered from rest events) for hasing experiment (flutter/flutter#164657)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 4cf9f0b77d41 to 43294a662fd0 (4 revisions) (flutter/flutter#164649)
2025-03-05 50643541+Mairramer@users.noreply.github.com Adds animateToItem to the CarouselController (flutter/flutter#162694)
2025-03-05 30870216+gaaclarke@users.noreply.github.com Cleanup content context (flutter/flutter#164229)
2025-03-05 34465683+rkishan516@users.noreply.github.com Fix: Update CupertinoSheetRoute transition rounded corner (flutter/flutter#163700)
2025-03-05 jonahwilliams@google.com [Impeller] fix macOS managed memory. (flutter/flutter#164635)
2025-03-05 jacksongardner@google.com [skwasm] Clear font collection cache when font is loaded manually. (flutter/flutter#164588)
2025-03-05 victorsanniay@gmail.com Fix race condition causing crash when interacting with an animating scrollable (flutter/flutter#164392)
2025-03-05 58529443+srujzs@users.noreply.github.com Use dwds 24.3.6 and pass uri for the reload scripts path to FrontendServerDdcLibraryBundleProvider (flutter/flutter#164582)
2025-03-05 engine-flutter-autoroll@skia.org Roll Packages from 9e4684e to abba683 (8 revisions) (flutter/flutter#164630)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 7e4323f72c9d to 4cf9f0b77d41 (1 revision) (flutter/flutter#164622)
2025-03-05 harri.kirik@lab.mobi Fix to Linux_pixel_7pro integration_ui_keyboard_resize test flakiness (flutter/flutter#162308)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 03a3f653d64e to 7e4323f72c9d (1 revision) (flutter/flutter#164599)
2025-03-05 34871572+gmackall@users.noreply.github.com Implement `clipPath` Mutator for hcpp (flutter/flutter#164525)
2025-03-05 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[Impeller] use DeviceLocal textures for gifs on non-iOS devices. (#164573)" (flutter/flutter#164600)
2025-03-05 jonahwilliams@google.com [macos] prefer integrated GPU. (flutter/flutter#164569)
2025-03-05 muhatashim@google.com Enforce minSdk constraint for Android Flutter (flutter/flutter#164251)
2025-03-05 dkwingsmt@users.noreply.github.com Add `clipRSuperellipse`, and use them for dialogs (flutter/flutter#161111)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 46705a22edc3 to 03a3f653d64e (1 revision) (flutter/flutter#164590)
2025-03-05 psturm@esri.com when resetting FlutterPlatformViewsController, clear out some additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
2025-03-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Rt6pxGFLVAJHduM0V... to fhm5z889sA5T1AQao... (flutter/flutter#164583)

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 stuartmorgan@google.com,tarrinneal@google.com 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
feinstein pushed a commit to feinstein/flutter that referenced this pull request May 8, 2025
…nal internal state to prevent it from carrying over across a Hot Restart (flutter#164456)

<!--
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When performing a Hot Restart on iOS in an app that uses PlatformViews,
a "recreating_view" PlatformException can be thrown. This happens
because some of the state of FlutterPlatformViewsController is not
cleared as part of the Hot Restart. Specifically,
`self.previousCompositionOrder` will have its previous value from before
the Hot Restart. The fix here clears that state as part of the Hot
Restart.

Fixes flutter#163935

## 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].

<!-- 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
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[Flutter Style Guide]:
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[Features we expect every widget to implement]:
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[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
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[Data Driven Fixes]:
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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 20, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 20, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 21, 2025
… additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
androidseb pushed a commit to androidseb/packages that referenced this pull request Jun 8, 2025
flutter/flutter@2578d97...321fbc0

2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from fefecd49e03a to ccd8cc23aa94 (1 revision) (flutter/flutter#164712)
2025-03-06 mdebbar@google.com [web] Detect scrollable semantics nodes more reliably (flutter/flutter#164491)
2025-03-06 matt.kosarek@canonical.com [windows] wire the focus request and the focus events through the Windows platform (flutter/flutter#164296)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 02897747c7d5 to fefecd49e03a (1 revision) (flutter/flutter#164701)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from e315b0ab7c84 to 02897747c7d5 (1 revision) (flutter/flutter#164677)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 0c3880f94970 to e315b0ab7c84 (1 revision) (flutter/flutter#164669)
2025-03-06 jonahwilliams@google.com [Impeller] use device private on non-iOS devices. (flutter/flutter#164601)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 43294a662fd0 to 0c3880f94970 (1 revision) (flutter/flutter#164661)
2025-03-05 codefu@google.com Add a workflow (only triggered from rest events) for hasing experiment (flutter/flutter#164657)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 4cf9f0b77d41 to 43294a662fd0 (4 revisions) (flutter/flutter#164649)
2025-03-05 50643541+Mairramer@users.noreply.github.com Adds animateToItem to the CarouselController (flutter/flutter#162694)
2025-03-05 30870216+gaaclarke@users.noreply.github.com Cleanup content context (flutter/flutter#164229)
2025-03-05 34465683+rkishan516@users.noreply.github.com Fix: Update CupertinoSheetRoute transition rounded corner (flutter/flutter#163700)
2025-03-05 jonahwilliams@google.com [Impeller] fix macOS managed memory. (flutter/flutter#164635)
2025-03-05 jacksongardner@google.com [skwasm] Clear font collection cache when font is loaded manually. (flutter/flutter#164588)
2025-03-05 victorsanniay@gmail.com Fix race condition causing crash when interacting with an animating scrollable (flutter/flutter#164392)
2025-03-05 58529443+srujzs@users.noreply.github.com Use dwds 24.3.6 and pass uri for the reload scripts path to FrontendServerDdcLibraryBundleProvider (flutter/flutter#164582)
2025-03-05 engine-flutter-autoroll@skia.org Roll Packages from 9e4684e to abba683 (8 revisions) (flutter/flutter#164630)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 7e4323f72c9d to 4cf9f0b77d41 (1 revision) (flutter/flutter#164622)
2025-03-05 harri.kirik@lab.mobi Fix to Linux_pixel_7pro integration_ui_keyboard_resize test flakiness (flutter/flutter#162308)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 03a3f653d64e to 7e4323f72c9d (1 revision) (flutter/flutter#164599)
2025-03-05 34871572+gmackall@users.noreply.github.com Implement `clipPath` Mutator for hcpp (flutter/flutter#164525)
2025-03-05 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[Impeller] use DeviceLocal textures for gifs on non-iOS devices. (#164573)" (flutter/flutter#164600)
2025-03-05 jonahwilliams@google.com [macos] prefer integrated GPU. (flutter/flutter#164569)
2025-03-05 muhatashim@google.com Enforce minSdk constraint for Android Flutter (flutter/flutter#164251)
2025-03-05 dkwingsmt@users.noreply.github.com Add `clipRSuperellipse`, and use them for dialogs (flutter/flutter#161111)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 46705a22edc3 to 03a3f653d64e (1 revision) (flutter/flutter#164590)
2025-03-05 psturm@esri.com when resetting FlutterPlatformViewsController, clear out some additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
2025-03-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Rt6pxGFLVAJHduM0V... to fhm5z889sA5T1AQao... (flutter/flutter#164583)

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 stuartmorgan@google.com,tarrinneal@google.com 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
FMorschel pushed a commit to FMorschel/packages that referenced this pull request Jun 9, 2025
flutter/flutter@2578d97...321fbc0

2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from fefecd49e03a to ccd8cc23aa94 (1 revision) (flutter/flutter#164712)
2025-03-06 mdebbar@google.com [web] Detect scrollable semantics nodes more reliably (flutter/flutter#164491)
2025-03-06 matt.kosarek@canonical.com [windows] wire the focus request and the focus events through the Windows platform (flutter/flutter#164296)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 02897747c7d5 to fefecd49e03a (1 revision) (flutter/flutter#164701)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from e315b0ab7c84 to 02897747c7d5 (1 revision) (flutter/flutter#164677)
2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 0c3880f94970 to e315b0ab7c84 (1 revision) (flutter/flutter#164669)
2025-03-06 jonahwilliams@google.com [Impeller] use device private on non-iOS devices. (flutter/flutter#164601)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 43294a662fd0 to 0c3880f94970 (1 revision) (flutter/flutter#164661)
2025-03-05 codefu@google.com Add a workflow (only triggered from rest events) for hasing experiment (flutter/flutter#164657)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 4cf9f0b77d41 to 43294a662fd0 (4 revisions) (flutter/flutter#164649)
2025-03-05 50643541+Mairramer@users.noreply.github.com Adds animateToItem to the CarouselController (flutter/flutter#162694)
2025-03-05 30870216+gaaclarke@users.noreply.github.com Cleanup content context (flutter/flutter#164229)
2025-03-05 34465683+rkishan516@users.noreply.github.com Fix: Update CupertinoSheetRoute transition rounded corner (flutter/flutter#163700)
2025-03-05 jonahwilliams@google.com [Impeller] fix macOS managed memory. (flutter/flutter#164635)
2025-03-05 jacksongardner@google.com [skwasm] Clear font collection cache when font is loaded manually. (flutter/flutter#164588)
2025-03-05 victorsanniay@gmail.com Fix race condition causing crash when interacting with an animating scrollable (flutter/flutter#164392)
2025-03-05 58529443+srujzs@users.noreply.github.com Use dwds 24.3.6 and pass uri for the reload scripts path to FrontendServerDdcLibraryBundleProvider (flutter/flutter#164582)
2025-03-05 engine-flutter-autoroll@skia.org Roll Packages from 9e4684e to abba683 (8 revisions) (flutter/flutter#164630)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 7e4323f72c9d to 4cf9f0b77d41 (1 revision) (flutter/flutter#164622)
2025-03-05 harri.kirik@lab.mobi Fix to Linux_pixel_7pro integration_ui_keyboard_resize test flakiness (flutter/flutter#162308)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 03a3f653d64e to 7e4323f72c9d (1 revision) (flutter/flutter#164599)
2025-03-05 34871572+gmackall@users.noreply.github.com Implement `clipPath` Mutator for hcpp (flutter/flutter#164525)
2025-03-05 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[Impeller] use DeviceLocal textures for gifs on non-iOS devices. (#164573)" (flutter/flutter#164600)
2025-03-05 jonahwilliams@google.com [macos] prefer integrated GPU. (flutter/flutter#164569)
2025-03-05 muhatashim@google.com Enforce minSdk constraint for Android Flutter (flutter/flutter#164251)
2025-03-05 dkwingsmt@users.noreply.github.com Add `clipRSuperellipse`, and use them for dialogs (flutter/flutter#161111)
2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 46705a22edc3 to 03a3f653d64e (1 revision) (flutter/flutter#164590)
2025-03-05 psturm@esri.com when resetting FlutterPlatformViewsController, clear out some additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456)
2025-03-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Rt6pxGFLVAJHduM0V... to fhm5z889sA5T1AQao... (flutter/flutter#164583)

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 stuartmorgan@google.com,tarrinneal@google.com 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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[iOS] regression: Hot Restart with a Platform View on a Navigator push throws PlatformException "recreating_view"
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