Animated webps with n loops actually runs n+1 loops #46289
Description
Animated webps with a specified number of loops will actually run n+1 loops. This is 100% reproducible with the version of Flutter I am on.
Steps to Reproduce
- Clone this repo https://github.com/KevinTheGray/aweb_bug
- Run the app on any device
- Observe the top webp loops infinitely as expected (loop count of 0 specified), the second webp incorrectly loops twice (loop count of 1 specified), the third webp incorrectly loops three times (loop count of 2 specified).
Target Platform: Android/iOS/macOS
Target OS version/browser: macOS 10.14.5 (18F132)
Devices: Happens on desktop as well as any simulator/emulator and physical device
[✓] Flutter (Channel master, v1.12.16-pre.35, on Mac OS X 10.14.5 18F132, locale en-US)
• Flutter version 1.12.16-pre.35 at /Users/KG/Developer/Flutter/flutter
• Framework revision b9a56b9f48 (7 days ago), 2019-11-29 20:40:44 -0500
• Engine revision 8672e79af8
• Dart version 2.7.0
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/KG/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• ANDROID_HOME = /Users/KG/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.2.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.2.1, Build version 11B500
• CocoaPods version 1.7.1
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 40.0.2
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] IntelliJ IDEA Community Edition (version 2018.2.5)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 29.1.3
• Dart plugin version 182.4892.25
[!] VS Code (version 1.35.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
✗ Flutter extension not installed; install from
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] Connected device (4 available)
• iPhone 5s • 9288B215-C389-4B17-B00A-8C9303B53F4D • ios • com.apple.CoreSimulator.SimRuntime.iOS-12-2 (simulator)
• macOS • macOS • darwin-x64 • Mac OS X 10.14.5 18F132
• Chrome • chrome • web-javascript • Google Chrome 78.0.3904.108