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MessageChannel hits ByteData.getFloat64 alignment crash on ARM #10701

@alardizabal

Description

@alardizabal

I've been experiencing mid-session crashes that started yesterday. There's little detail in the output when the crash occurs. I don't seem to be experiencing the same type of crash on iOS.

IntelliJ

F/libc    (14696): Fatal signal 11 (SIGSEGV), code 1, fault addr 0xc4983159 in tid 14726 (ui_thread)
Lost connection to device.

Android Studio Logcat

A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0xc4983159 in tid 14726 (ui_thread)
                                                        
[ 06-14 14:48:47.689   569:  569 W/         ]
debuggerd: handling request: pid=14696 uid=10419 gid=10419 tid=14726
☆ flutter doctor
[✓] Flutter (on Mac OS X 10.12.5 16F73, locale en-US, channel master)
    • Flutter at /Users/albertlardizabal/dev/flutter
    • Framework revision ede575a92e (3 hours ago), 2017-06-14 09:05:53 -0700
    • Engine revision 4f5d6fab11
    • Tools Dart version 1.24.0-dev.6.7

[✓] Android toolchain - develop for Android devices (Android SDK 25.0.3)
    • Android SDK at /Users/albertlardizabal/Library/Android/sdk
    • Platform android-25, build-tools 25.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] iOS toolchain - develop for iOS devices (Xcode 9.0)
    • Xcode at /Applications/Xcode-beta.app/Contents/Developer
    • Xcode 9.0, Build version 9M136h
    • ios-deploy 1.9.0
    • CocoaPods version 1.2.1

[✓] Android Studio (version 2.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Gradle version 3.2
    • Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] IntelliJ IDEA Community Edition (version 2017.1.4)
    • Flutter plugin version 14.0
    • Dart plugin version 171.4694.29

[✓] Connected devices
    • Pixel        • FA71A0302167                             • android-arm • Android 7.1.2 (API 25)
    • Posse iPhone • ac24c3de3cbe39efed542095769ce83fc89630f7 • ios         • iOS 10.3.1 (14E304)
    •              • c0e109b7e55a826627aa0f3e79af8931534f3554 • ios         • iOS  ()

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