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Check video widget is mounted on call to setState - #18467

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xster merged 1 commit into
flutter:masterfrom
cbracken:check-setstate
Jun 14, 2018
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Check video widget is mounted on call to setState#18467
xster merged 1 commit into
flutter:masterfrom
cbracken:check-setstate

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@cbracken

@cbracken cbracken commented Jun 14, 2018 •
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When setState() calls occur asynchronously, it's possible that the
Futures on which they're waiting don't complete until the widget is
removed. To avoid this, we check the widget is mounted before calling
setState().

Fixes a devicelab test failure in test_driver/transitions_perf.dart

@cbracken
Check video widget is mounted on call to setState
3cdf6f5 
When setState() calls occur asynchronously, it's possible that the
Futures on which they're waiting don't complete until the widget is
offscreen. To avoid this, we check the widget is mounted before calling
setState().
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cbracken requested a review from xster June 14, 2018 00:49
@xster

xster commented Jun 14, 2018

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LGTM

@cbracken

cbracken commented Jun 14, 2018

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Fixes a devicelab test failure:

stdout: Starting application: test_driver/transitions_perf.dart
stderr: Could not find application bundle at build/ios/iphoneos/Runner.app; have you run "flutter build ios"?
stdout: Signing iOS app for device deployment using developer identity: "iPhone Developer: Google Development (3F4Y5873JF)"
stdout: Manually selecting Google's mobile provisioning profile (see go/google-flutter-signing).
stdout: [VERBOSE-2:dart_error.cc(16)] Unhandled exception:
stdout: 	NoSuchMethodError: The method 'markNeedsBuild' was called on null.
stdout: 	Receiver: null
stdout: 	Tried calling: markNeedsBuild()
stdout: 	#0      State.setState (package:flutter/src/widgets/framework.dart:1141)
stdout: 	#1      _VideoDemoState.initState.initController (package:flutter_gallery/demo/video_demo.dart:377)
stdout: 	
stdout: 	#2      _VideoDemoState.initState (package:flutter_gallery/demo/video_demo.dart:380)
stdout: 	#3      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3751)
stdout: 	#4      ComponentElement.mount (package:flutter/src/widgets/framework.dart:3617)
stdout: 	#5      Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907)

@xster

xster commented Jun 14, 2018

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I'm gonna merge this on red to un-red the build

@xster
xster merged commit 03b5b1c into flutter:master Jun 14, 2018
@Hixie

Hixie commented Jun 14, 2018

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FWIW, this apparently did not fix the build.

@cbracken
cbracken deleted the check-setstate branch June 14, 2018 18:34
srawlins added a commit to srawlins/flutter that referenced this pull request Jun 15, 2018
@srawlins
Merge branch 'master' into bump-mockito-beta
b0febc7 
* master:
  Remove race conditions involving finding available ports (flutter#18488)
  Skip painting hidden children of a sliver list (flutter#18465)
  Fixed some typos (flutter#18516)
  update Tristate checkbox semantics to consider indeterminate as "unchecked" (flutter#18297)
  Add flutter tool support for creating app-specific VM snapshots. (flutter#18417)
  mention Text.rich on RichText (flutter#18434)
  invert children for real (flutter#18489)
  Fix clipping for SliverLists (flutter#18410)
  Keep TextFields visible when keyboard comes up (flutter#18291)
  Update all packages (flutter#18506)
  Prepare for upgrading video player in Gallery to newest version (flutter#18501)
  Update Android dependencies (flutter#18499)
  Enable running with prebuilt test-only apk (flutter#18453)
  Revert "Update all packages (flutter#18471)" (flutter#18492)
  Add some more dart doc to RepaintBoundary (flutter#17183)
  Update all packages (flutter#18471)
  Clean up output of "flutter run --release" (flutter#18380)
  Ensure errors launching emulators are exposed to the daemon (flutter#18446)
  Check video widget is mounted on call to setState (flutter#18467)
  Fixed concurrent list modification in vmservice.dart
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