"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 obj=0x76370a40 self=0x7f93a95a00
  | sysTid=14258 nice=-10 cgrp=default sched=0/0 handle=0x7f97a31a98
  | state=S schedstat=( 1597601152 46352859 4136 ) utm=122 stm=37 core=4 HZ=100
  | stack=0x7fd1766000-0x7fd1768000 stackSize=8MB
  | held mutexes=
  kernel: (couldn't read /proc/self/task/14258/stack)
  native: #00 pc 000000000001c16c  /system/lib64/libc.so (syscall+28)
  native: #01 pc 00000000000690a0  /system/lib64/libc.so (_ZL33__pthread_mutex_lock_with_timeoutP24pthread_mutex_internal_tbPK8timespec+744)
  native: #02 pc 00000000006b3a58  /data/app/com.example.flutterlooprunner-2/lib/arm64/libflutter.so (???)
  native: #03 pc 0000000000114450  /data/app/com.example.flutterlooprunner-2/lib/arm64/libflutter.so (???)
  native: #04 pc 00000000000c93b0  /data/app/com.example.flutterlooprunner-2/lib/arm64/libflutter.so (???)
  native: #05 pc 00000000000047d4  /data/app/com.example.flutterlooprunner-2/oat/arm64/base.odex (Java_io_flutter_view_VsyncWaiter_nativeOnVsync__JJJ+144)
  at io.flutter.view.VsyncWaiter.nativeOnVsync(Native method)
  at io.flutter.view.VsyncWaiter.access$000(VsyncWaiter.java:9)
  at io.flutter.view.VsyncWaiter$1.doFrame(VsyncWaiter.java:17)
  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:881)
  at android.view.Choreographer.doCallbacks(Choreographer.java:689)
  at android.view.Choreographer.doFrame(Choreographer.java:621)
  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:869)
  at android.os.Handler.handleCallback(Handler.java:751)
  at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:159)
  at android.app.ActivityThread.main(ActivityThread.java:6364)
  at java.lang.reflect.Method.invoke!(Native method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1096)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:883)

~/Library/Android/android-ndk-r10e/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin/aarch64-linux-android-addr2line -e 6fe748490d1772d72274bf8b9efb72c5c2160237/arm64-v8a/libflutter.so 00000000006b3a58 0000000000114450 00000000000c93b0

/usr/local/google/buildbot/src/android/ndk-r12-release/ndk/sources/cxx-stl/llvm-libc++/libcxx/src/mutex.cpp:31 (discriminator 1)
/b/build/slave/Linux_Engine/build/src/out/android_release_arm64/../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include/__mutex_base:85
/b/build/slave/Linux_Engine/build/src/out/android_release_arm64/../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include/functional:1756

Analyzing flutter_loop_runner...                                 
No issues found! (ran in 1.3s)

[✓] Flutter (Channel master, v0.5.7-pre.62, on Mac OS X 10.13.5 17F77, locale zh-Hans-CN)
    • Flutter version 0.5.7-pre.62 at /Users/joker/codes/flutter
    • Framework revision 7ac183794b (2 days ago), 2018-07-06 15:21:29 -0700
    • Engine revision 6fe748490d
    • Dart version 2.0.0-dev.63.0.flutter-4c9689c1d2

[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at /Users/joker/Library/Android/sdk
    • Android NDK at /Users/joker/Library/Android/sdk/ndk-bundle
    • Platform android-27, build-tools 27.0.3
    • ANDROID_HOME = /Users/joker/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_152-release-1024-b01)
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    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.4.1, Build version 9F2000
    • ios-deploy 1.9.2
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    • Android Studio at /Applications/Android Studio 3.2 Preview.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b02)

[✓] Android Studio (version 3.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 26.0.1
    • Dart plugin version 173.4700
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)

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    • VS Code at /Applications/Visual Studio Code.app/Contents
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[✓] Connected devices (1 available)
    • OD103 • 3576b9c7 • android-arm64 • Android 7.1.1 (API 25)

! Doctor found issues in 1 category.