The release of the Flutter 3.16 beta contains the changes noted below.

To try out the newest beta run:

flutter channel beta
flutter upgrade

Flutter 3.16 beta (October 11, 2023)

Framework

• CupertinoAlertDialog should not create ScrollController on every build, if null values are passed in constructor. by @polina-c in #133918
• _SearchBarState should dispose FocusNode, if it created it. by @polina-c in #133947
• RenderParagraph should dispose instances of SelectableFragments. by @polina-c in #133915
• _MaterialAppState should dispose MaterialHeroController. by @polina-c in #133951
• Cover more tests with leak tracking. by @polina-c in #133958
• Dispose AnimationSheetRecorder to avoid leaks by @dkwingsmt in #133365
• Revert "_SearchBarState should dispose FocusNode, if it created it." by @polina-c in #134072
• Revert "CupertinoAlertDialog should not create ScrollController on every build, if null values are passed in constructor." by @polina-c in #134071
• _DropdownMenuState should dispose TextEditingController. by @polina-c in #133914
• Fix not disposed items in Cupertino app and route. by @polina-c in #134085
• MinimumTextContrastGuideline should dispose image. by @polina-c in #133861
• Add CheckedPopupMenuItem.onTap callback by @piedcipher in #134000
• Fix subtitleTextStyle.color isn't applied to the ListTile.subtitle in Material 2 by @burakJs in #133422
• Clean the fixed TODOs. by @polina-c in #133859
• DraggableScrollableActuator should dispose notifier. by @polina-c in #133917
• Reland "Fix Chip.shape's side is not used when provided in Material 3" by @TahaTesser in #133856
• Fix DataTable's headingTextStyle & dataTextStyle are not merged with default text style by @TahaTesser in #134138
• Fix TabBar doesn't use labelStyle & unselectedLabelStyle color by @TahaTesser in #133989
• Fixed [NavigationRailDestination]'s label opacity while disabled not being coherent with the icon by @matheus-kirchesch-btor in #132345
• SearchDelegate should dispose resources. by @polina-c in #133948
• Cover some test/widgets tests with leak tracking by @ksokolovskyi in #133803
• DropdownRoutePage should dispose the created ScrollController. by @polina-c in #133941
• Fix ExpansionTile properties cannot be updated with setState by @TahaTesser in #134218
• [integration_test] Allow capture of screenshots for FlutterFragmentActivitys by @gmackall in #132406
• _SearchBarState should dispose FocusNode, if it created it. by @polina-c in #134076
• CupertinoAlertDialog should not create ScrollController on every build, if null values are passed in constructor. by @polina-c in #134075
• TestWidgetsFlutterBinding should dispose old RestorationManager on reset. by @polina-c in #133999
• EditableTextState should dispose cursorVisibilityNotifier. by @polina-c in #133858
• Remove non needed controllers in SegmentedButton. by @polina-c in #134064
• _TabBarViewState should dispose created instances of PageController. by @polina-c in #134091
• Fix Drawer examples are missing dartpad tag by @TahaTesser in #134219
• fix a Scrollbar example crash by @xu-baolin in #127925
• Update links to iOS embedder docs to point to new Doxygen docs by @gspencergoog in #134246
• Make CupertinoTextField at least as tall as its first line of placeholder by @LongCatIsLooong in #134198
• Update chip docs to clarify how to specify a shape with no border & explain default values for Material 3 by @TahaTesser in #134298
• InputDecoration.error should activate error state by @Renzo-Olivares in #134001
• Remove TextPainter migration flag from the framework by @LongCatIsLooong in #134274
• RestorationManager should dispatch creation in constructor. by @polina-c in #133911
• Fix memory leak in _DraggableScrollableSheetState by @ksokolovskyi in #134212
• Day picker should dispose created MaterialStatesController's. by @polina-c in #133884
• SelectableRegion onSelectionChange should be called when the selection changes by @Renzo-Olivares in #134215
• Cover more tests with leak tracking. by @polina-c in #134363
• Mark leak: instances of OpacityLayer, created by _RenderChip, should be disposed. by @polina-c in #134395
• Fix memory leak in RenderAnimatedSize by @ksokolovskyi in #133653
• Cover focus tests with leak tracking by @ksokolovskyi in #134457
• Fix DataTable example not being scrollable by @Chinmay-KB in #131556
• ScaleGestureRecognizer: make pointerCount public by @kseino in #127310
• [New feature] Allowing the ListView slivers to have different extents while still having scrolling performance by @xu-baolin in #131393
• Revert "Adds a parent scope TraversalEdgeBehavior and fixes modal rou… by @chunhtai in #134550
• Remove deprecated TextSelectionOverlay.fadeDuration by @Piinks in #134485
• Remove chip tooltip deprecations by @Piinks in #134486
• Enable private field promotion for examples by @goderbauer in #134478
• Enable private field promotion for other packages by @goderbauer in #134475
• Fix SliverList example descriptions by @Piinks in #134483
• Ensure OverlayPortal.overlayChild's renderObject is reachable via treewalk by @LongCatIsLooong in #134497
• Fix TabBarView desynchronized after animation interruption by @bleroux in #132748
• Cover more test/widgets tests with leak tracking #2 by @ksokolovskyi in #134387
• _YearPicker should dispose ScrollController and MaterialSatesController. by @polina-c in #134393
• Update BottomSheetTest by @Hangyujin in #134562
• removed unused variable in the example code of semantic event by @chrisdlangham in #134551
• Cover more test/widgets tests with leak tracking #4 by @ksokolovskyi in #134663
• Updated MaterialStatesController class api doc by @HansMuller in #134592
• Bump gradle heap size limit in everywhere by @zanderso in #134665
• [framework] reduce ink sparkle uniform count. by @jonahwilliams in #133897
• Dispose routes in navigator when throwing exception by @Hangyujin in #134596
• [bug] Fix null check crash by ReorderableList by @opxdelwin in #132153
• Update KeepAlive.debugTypicalAncestorWidgetClass by @Piinks in #133498
• Remove Path.combine call from CupertionoTextSelectionToolbar by @LongCatIsLooong in #134369
• _DayPicker should build days using separate stetefull widget _Day. by @polina-c in #134607
• LinkedText (Linkify) by @justinmc in #125927
• Fix NavigationRail hover misplaced when using large icons by @bleroux in #134719
• 🐛 Setup color tween for RefreshIndicator in a better way by @AlexV525 in #134492
• Cover some Services tests with leak tracing by @NobodyForNothing in #134381
• Cover more test/widgets tests with leak tracking #3 by @ksokolovskyi in #134576
• Allows page removal that contains Localhistoryentry by @chunhtai in #134757
• Fix memory leak in ListWheelScrollView by @ksokolovskyi in #134732
• Fix navigation rail hover misplaced when direction is RTL and extended is true by @bleroux in #134815
• Date picker dialog state should dispose members. by @polina-c in #134804
• Dispose layers in test. by @polina-c in #134802
• Add disposal mechanism for created Layers to TestRecordingPaintingContext. by @polina-c in #134768
• Fix memory leak in CupertinoActionSheet by @ksokolovskyi in #134885
• Improve DropdownMenu sample code for requestFocusOnTap on mobile platforms by @huycozy in #134867
• Fix memory leak in _DarwinViewState. by @ksokolovskyi in #134938
• [flutter roll] Revert "LinkedText (Linkify)" by @XilaiZhang in #134955
• Cover more test/widgets tests with leak tracking #5 by @ksokolovskyi in #134869
• Cover more tests with leak tracking. by @polina-c in #134805
• Cover more test/widgets tests with leak tracking #6 by @ksokolovskyi in #134884
• Enable private field promotion for framework by @goderbauer in #134473
• Fixes focus traversal crash if the current node can't request focus by @chunhtai in #134954
• Resolve breaking change of adding a method to ChangeNotifier. by @polina-c in #134953
• Reland Resolve breaking change of adding a method to ChangeNotifier. by @polina-c in #134983
• Remove 'must be non-null' and 'must not be null' comments from non-framework libraries by @gspencergoog in #134994
• Specify suggested format in doc comment. by @polina-c in #134887
• [web] Encode AssetManifest.bin as JSON and use that on the web. by @ditman in #131382
• cover more tests with leak tracking by @NobodyForNothing in #134837
• Remove 'must not be null' comments from painting and rendering libraries. by @gspencergoog in #134993
• Unpin url launcher (remake) by @gmackall in #134958
• Cover more test/widgets tests with leak tracking #9 by @ksokolovskyi in #135054
• Cover more test/widgets tests with leak tracking #8 by @ksokolovskyi in #135045
• Remove 'must not be null' comments from various libraries. by @gspencergoog in #134984
• Remove 'must be non-null' and 'must not be null' comments in widgets library by @gspencergoog in #134992
• cover more tests with leak tracing by @NobodyForNothing in #134833
• Cover more test/widgets tests with leak tracking #10 by @ksokolovskyi in #135143
• Enable strict-inference by @goderbauer in #135043
• Cover more test/widgets tests with leak tracking #7 by @ksokolovskyi in #134943
• Cover cupertino/form_section_test with leak tracing by @NobodyForNothing in #135158
• [deps] Update package:web dependency. by @ditman in #135174
• Fix memory leak in _SelectableTextState by @ksokolovskyi in #135049
• Fix leak in hardware_keyboard_test.dart by @NobodyForNothing in #134380
• cover more tests with leak tracing by @NobodyForNothing in #134834
• Mark ReastaurationManager not disposed by @NobodyForNothing in #134832
• Rename debugProfilePlatformChannels to a constant that works in release mode by @jiahaog in #134922
• Form fields onChange callback should be called on reset by @bleroux in #134295
• Cover some cupertino tests with leak tracing by @NobodyForNothing in #135149
• Handle breaking changes in leak_tracker. by @polina-c in #135185
• Add RestorationManager disposals in test/services/restoration_test.dart. by @ksokolovskyi in #135218
• Add a parameter to configure InputDecorator hint fade animations duration by @bleroux in #135211
• Fix a TextSpan test by @LongCatIsLooong in #135187
• Update alwaysNeedsCompositing in RenderParagraph by @Hangyujin in #135076
• Cover more test/widgets tests with leak tracking #11 by @ksokolovskyi in #135231
• Fix memory leak in NestedScrollViewState. by @ksokolovskyi in #135248
• Size CupertinoTextSelectionToolbar to children by @tgucio in #133386
• Remove extra padding if a dropdown menu entry also has a leading icon by @QuncCccccc in #135004
• Added option to disable [NavigationDrawerDestination]s by @matheus-kirchesch-btor in #132349
• _RenderChip should not create OpacityLayer without disposing. by @polina-c in #134708
• Fix memory leak in _MatchesReferenceImage by @ksokolovskyi in #135150
• Fix _paintAvatar in chip.dart to dispose layer. by @polina-c in #135228
• TabController should dispatch creation in constructor. by @polina-c in #133952
• Convert relative to absolute import. by @polina-c in #135337
• [iOS,macOS] Clean up obsolete PlatformView warning by @cbracken in #135040
• Fix failing test at master. by @polina-c in #135394
• Add a basic golden test for CupertinoTextSelectionToolbar by @LongCatIsLooong in #135267
• simulatedAccessibilityTraversal account for force merging by @chunhtai in #135178
• [Velocity Tracker] Fix: Issue 97761: Flutter Scrolling does not match iOS; inadvertent scrolling when user lifts up finger by @chipweinberger in #132291
• Fix and Test Conditional Validator Behavior in FormField by @EdgarJan in #132714
• Add "Frame Request Pending" lag to collected metrics by @moffatman in #135279
• SelectionArea long press selection overlay behavior should match native by @Renzo-Olivares in #133967
• Allow multiple ParentDataWidgets to write to ParentData by @Piinks in #133581
• [documentation] remove repeated "For example," in RenderSliverEdgeInsetsPadding documentation by @mateusfccp in #135297
• Fix SearchAnchor's search view isn't updated when the theme changes & widgets inside the search view do not inherit local themes by @TahaTesser in #132749
• made top level if checks gaurd clauses by @caseycrogers in #135070
• Support ensureVisible/showOnScreen/showInViewport for 2D Scrolling by @Piinks in #135182
• Implement SelectionArea single click/tap gestures by @Renzo-Olivares in #132682
• Update TextField.style documentation for Material 3 by @TahaTesser in #135556
• Fix RangeSlider throws an exception in a ListView by @TahaTesser in #135667
• [web] fix: do not call onSubmitted of TextField when switching browser tabs on mobile web by @tauu in #134870
• Add API to read flavor from framework at run time by @andrewkolos in #134179
• 🚀 Add more fields to RefreshProgressIndicator by @AlexV525 in #135207
• Added option to disable [NavigationDestination]s ([NavigationBar] destination widget) by @matheus-kirchesch-btor in #132361
• Fix TabBarView.viewportFraction change is ignored by @bleroux in #135590
• Remove assertions on getOffsetToReveal by @Piinks in #135634

Tooling

• Retry connecting to device in CI after lost connection by @vashworth in #133769
• [flutter_tools] Fix "FormatException: Invalid date format" during version freshness check by @christopherfujino in #134088
• Add ios analyzer command for universal links by @chunhtai in #134155
• Native assets support for MacOS and iOS by @dcharkes in #130494
• [flutter_tools] disallow -O0 for flutter build web by @christopherfujino in #134185
• Enable private field promotion for flutter_tools by @goderbauer in #134474
• Clean up analytics opt in/out flags by @eliasyishak in #132588
• Set the CONFIGURATION_BUILD_DIR in generated xcconfig when debugging core device by @vashworth in #134493
• [flutter_tools] Run ShutdownHooks when handling signals by @christopherfujino in #134590
• Update plugin_ffi generated file to match FFIgen 9.0.0 by @dcharkes in #134614
• [web] provide serviceWorkerVersion to the getNewServiceWorker function by @p-mazhnik in #131240
• Speed up native assets target by @dcharkes in #134523
• Makes scheme and target optional parameter when getting universal lin… by @chunhtai in #134571
• Native assets support for Linux by @dcharkes in #134031
• Don't uninstall before retrying to connect during app launch by @vashworth in #134542
• [flutter roll] Revert "Native assets support for Linux" by @XilaiZhang in #135069
• [Android] Add Java/AGP/Gradle incompatibility warning to flutter create by @camsim99 in #131444
• codeisn extension safe iOS framework by @cyanglaz in #134966
• finer grained logging of Chromium launch sequence by @yjbanov in #135078
• Add --frontend-server-starter-path option to flutter run and flutter test by @derekxu16 in #135038
• Send analytics on 'build ios' and 'build ipa' for plist impeller value by @zanderso in #135193
• remove field override, assign to super field instead by @jakemac53 in #135165
• Reland "Native assets support for Linux" by @dcharkes in #135097
• Refactor "app plugin loader" Gradle Plugin so it can be applied using the declarative plugins {} block by @bartekpacia in #127897
• Roll pub packages by @flutter-pub-roller-bot in #135315
• [macOS,iOS] Improve CocoaPods upgrade instructions by @cbracken in #135453
• Wait for CONFIGURATION_BUILD_DIR to update when debugging with Xcode by @vashworth in #135444
• Switch flutter_tools to run frontend server from AOT snapshot by @derekxu16 in #135255
• [flutter_tools] fix tests with no native assets running native asset build by @christopherfujino in #135474
• Revert "Switch flutter_tools to run frontend server from AOT snapshot" by @CaseyHillers in #135537
• ✨ flutter config --list by @AlexV525 in #135401
• Native assets support for Windows by @dcharkes in #134203
• Roll pub packages by @flutter-pub-roller-bot in #135455
• [tool] fallback to sigkill when closing Chromium by @yjbanov in #135521
• Pin leak_tracker before publishing breaking change. by @polina-c in #135720
• [flutter_tools] remove VmService screenshot for native devices. by @jonahwilliams in #135462

New Contributors

• @burakJs made their first contribution in #133422
• @chrisdlangham made their first contribution in #134551
• @K9i-0 made their first contribution in #134339
• @chipweinberger made their first contribution in #132291
• @EdgarJan made their first contribution in #132714

Engine

Android

• Adds a comment on clang_arm64_apilevel26 toolchain usage by @zanderso in flutter/engine#45467
• Add trace-to-file switch by @derekxu16 in flutter/engine#45553
• [Impeller] moved validation layers on by default logic to gni scripts by @gaaclarke in flutter/engine#45682
• Tighten up ImageReaderPlatformViewRenderTarget code by @johnmccutchan in flutter/engine#45889
• Disable HardwareBuffer backed Platform Views temporarily by @johnmccutchan in flutter/engine#45986
• [Android] Add support for setting thread affinity based on core speed. by @jonahwilliams in flutter/engine#45673
• [Impeller] Affinity adjustments for Vulkan backend. by @jonahwilliams in flutter/engine#46063
• Re-enable HardwareBuffer backed Platform Views on Android >= 29 by @johnmccutchan in flutter/engine#46071
• [Android] Fix enableSuggestions set to false not honored by @bleroux in flutter/engine#46037
• [Android] Rename allowChannelBufferOverflow to `setWarnsOnChannelOv… by @bleroux in flutter/engine#46361
• Fix damage calculation when not providing populate_existing_damage for gl embedder by @ajihyf in flutter/engine#45611

iOS

• Fix iOS unittests leak in shared.invoke method channel that causes crash by @cyanglaz in flutter/engine#45416
• Reverts part of "fix auto-correction highlight on top left corner (Again)" by @hellohuanlin in flutter/engine#45523
• [ios] Fix testDeallocated failing locally. by @cyanglaz in flutter/engine#45663
• Reland "Build iOS unittest target in unopt builds" (#44356)"" (#45346)" by @cyanglaz in flutter/engine#45519
• [iOS] Remove selectionDidChange call in UndoManager by @LongCatIsLooong in flutter/engine#45657
• [macOS,iOS] Expose channel buffers 'resize' and 'overflow' control co… by @bleroux in flutter/engine#44848
• Made the warning about downgrading wide gamut happen at the correct time by @gaaclarke in flutter/engine#46064
• [Impeller] adds hardware gate for wide gamut by @gaaclarke in flutter/engine#46051
• Make a variety of low-impact Clang tidy fixes. by @matanlurey in flutter/engine#46114
• [ios] fix asset url not found when loading app extension by @cyanglaz in flutter/engine#46073
• [Impeller] fail if software backend is chosen and Impeller is enabled on iOS by @dnfield in flutter/engine#46124
• [iOS] Disable spelling corrections when auto correction is disabled by @bleroux in flutter/engine#46144
• Revert "[Impeller] fail if software backend is chosen and Impeller is enabled on iOS" by @CaseyHillers in flutter/engine#46217
• [ios] Fix default assets url by @cyanglaz in flutter/engine#46214
• [ios] Fix app extension not able to find assets from unloaded bundle by @cyanglaz in flutter/engine#46283
• Reverts "[ios] Fix app extension not able to find assets from unloaded bundle" by @auto-submit in flutter/engine#46328
• Reland "[ios] Fix app extension not able to find assets from… by @cyanglaz in flutter/engine#46329

Web

• Update deps on DDC build targets by @nshahan in flutter/engine#45404
• [Web] Fix insertions/deletions at inverted selection for TextEditingDeltas by @Renzo-Olivares in flutter/engine#44693
• Remove usage of the Jazzy document formatter for Objective C, in favor of Doxygen. by @gspencergoog in flutter/engine#45561
• Remove some of our hacks around JSPromise now that we have better APIs. by @eyebrowsoffire in flutter/engine#45591
• Update skwasm build to use safer flush call by @kjlubick in flutter/engine#45652
• Revert "Remove some of our hacks around JSPromise now that we have better APIs." by @eyebrowsoffire in flutter/engine#45660
• [Web] Properly report inverted selection by @knopp in flutter/engine#44806
• Fix JS interop signatures to use only JS types. by @eyebrowsoffire in flutter/engine#45668
• Use a single OffscreenCanvas for rendering in CanvasKit by @harryterkelsen in flutter/engine#42672
• Revert "Use a single OffscreenCanvas for rendering in CanvasKit" by @harryterkelsen in flutter/engine#45744
• [web] Use DOM to render paragraphs with letter spacing by @mdebbar in flutter/engine#45651
• Compile a platform dill for dart2wasm by @eyebrowsoffire in flutter/engine#45797
• Update webdriver imports. by @godofredoc in flutter/engine#45816
• Declare the js context as nullable in skwasm surface callback by @eyebrowsoffire in flutter/engine#45810
• Enable private field promotion by @goderbauer in flutter/engine#45722
• Migrate GrMipmapped->skgpu::Mipmapped by @kjlubick in flutter/engine#45881
• [web] De-singletonize MouseCursor for multi-view by @mdebbar in flutter/engine#45295
• [web] ScreenOrientation singleton by @mdebbar in flutter/engine#45304
• Add missing include of SkPath by @kjlubick in flutter/engine#45996
• [web] DOM objects implement JS object by @mdebbar in flutter/engine#46047
• Update CI to Chrome 117 by @eyebrowsoffire in flutter/engine#45842
• Implement JSObject instead of extending by @srujzs in flutter/engine#46070
• Enable strict-inference by @goderbauer in flutter/engine#46062
• Properly transfer objects between the main thread and web worker. by @eyebrowsoffire in flutter/engine#46061
• [web] Make PlatformViewManager a clear singleton by @mdebbar in flutter/engine#46044
• [web] Move context menu handling to its own class by @mdebbar in flutter/engine#46042
• Revert "[web] fix clicks on merged semantic nodes (#43620)" by @yjbanov in flutter/engine#46067
• Add description to assert in history.dart by @kenzieschmoll in flutter/engine#46072
• [canvaskit] Use DirectionalLight_Shadow flag for drawing shadows by @harryterkelsen in flutter/engine#46292
• Update to use GrDirectContexts::MakeGL by @kjlubick in flutter/engine#46308
• [canvaskit] Do not double-apply ImageFilter transform to children by @harryterkelsen in flutter/engine#46336

Desktop

• Add macOS support for plugin value publishing by @stuartmorgan in flutter/engine#45502
• Merge Window into FlutterWindow by @yaakovschectman in flutter/engine#45542
• Use start instead of extent for Windows IME cursor position by @yaakovschectman in flutter/engine#45667
• Handle external window's WM_CLOSE in lifecycle manager by @yaakovschectman in flutter/engine#45840
• Revert "[Windows] Update vsync on raster thread (#45310)" by @cbracken in flutter/engine#46000
• Rename layoutGoals to kLayoutGoals to enforce lints on headers. by @matanlurey in flutter/engine#46054
• Add TODO(name) to comply with Clang Tidy. by @matanlurey in flutter/engine#46057
• FlutterMouse.* -> kFlutterMouse.*, so we can lint header files. by @matanlurey in flutter/engine#46056
• [macOS] Synchronise modifiers from mouse events for RawKeyboard by @knopp in flutter/engine#46230
• [Windows] Improve logic to update swap intervals by @loic-sharma in flutter/engine#46172
• [macOS] performKeyEquivalent cleanup by @knopp in flutter/engine#45946
• Revert "[macOS] performKeyEquivalent cleanup (#45946)" by @cbracken in flutter/engine#46374
• [macOS] FlutterTextInputPlugin should clip to bounds by @knopp in flutter/engine#46142
• [macOS] TextInputPlugin should mark navigation events in IME popover as handled by @knopp in flutter/engine#46141
• Reland: [macOS] performKeyEquivalent cleanup by @knopp in flutter/engine#46377

New Contributors

• @kenzieschmoll made their first contribution in flutter/engine#46072
• @ajihyf made their first contribution in flutter/engine#45611