Flutter - Appbundle - Android app freezes on start

Question

I have an app with more than 150k+ users and I have avoided using appbundle until now just because I don't know how it really works, but last week I had no choice and sent an update with an appbundle. Since then, many users are reporting that the app is freezing on start with a black screen (It has no splash screen).

I took a look on the Android Vitals in the Play Console and I found this

signal 11 (SIGSEGV), code 1 (SEGV_MAPERR)

backtrace:

  #00  pc 000000000014d960  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #01  pc 0000000000140bcb  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #02  pc 000000000014389d  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #03  pc 0000000000010255  /system/lib/libutils.so (android::Looper::pollInner(int)+576)

  #04  pc 000000000000ff7d  /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+32)

  #05  pc 000000000000c543  /system/lib/libandroid.so (ALooper_pollOnce+50)

  #06  pc 0000000000143979  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #07  pc 0000000000140a5b  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #08  pc 00000000001429cd  /data/app/my.app-aw5yMuTEkO-Q1NwkE1kbgg==/lib/arm/libflutter.so

  #09  pc 0000000000048811  /system/lib/libc.so (__pthread_start(void*)+24)

  #10  pc 000000000001b369  /system/lib/libc.so (__start_thread+32)


backtrace:

  #00  pc 0000000000714094  /data/app/my.app-1/lib/arm64/libflutter.so

  #01  pc 000000000028c314  /data/app/my.app-1/lib/arm64/libflutter.so

  #02  pc 000000000027d698  /data/app/my.app-1/lib/arm64/libflutter.so

  #03  pc 000000000028105c  /data/app/my.app-1/lib/arm64/libflutter.so

  #04  pc 000000000001c004  /system/lib64/libutils.so (_ZN7android6Looper9pollInnerEi+524)

  #05  pc 000000000001c268  /system/lib64/libutils.so (_ZN7android6Looper8pollOnceEiPiS1_PPv+80)

  #06  pc 000000000000c650  /system/lib64/libandroid.so (ALooper_pollOnce+84)

  #07  pc 0000000000281178  /data/app/my.app-1/lib/arm64/libflutter.so

  #08  pc 000000000027d4ac  /data/app/my.app-1/lib/arm64/libflutter.so

  #09  pc 000000000027fd5c  /data/app/my.app-1/lib/arm64/libflutter.so

  #10  pc 0000000000067784  /system/lib64/libc.so (_ZL15__pthread_startPv+52)

  #11  pc 000000000001c604  /system/lib64/libc.so (__start_thread+16)

I tested it on many real devices and many simulators too (x86_x64). Unfortunately (or fortunately) it worked fine on all these tests.

To be honest, I have no idea what to do. If someone have a hint on what is happening or maybe how to reproduce this, I would be very grateful.

Flutter doctor

[√] Flutter (Channel beta, v1.9.1+hotfix.4, on Microsoft Windows [versão 10.0.18362.356], locale pt-BR)
    • Flutter version 1.9.1+hotfix.4 at C:\Users\Willian\Documents\Repositories\flutter
    • Framework revision cc949a8e8b (7 days ago), 2019-09-27 15:04:59 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0


[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at C:\Users\Willian\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
    • All Android licenses accepted.

[!] Android Studio (version 3.5)
    • Android Studio at C:\Program Files\Android\Android Studio
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.38.1)
    • VS Code at C:\Users\Willian\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.5.1

[!] Connected device
    ! No devices available

EDIT:

The problem is not the appbundle. I tried with --split-per-abi with two apk's ("armeabi-v7a" and "arm64-v8a") and the problem is still happening.

Answer 1

I faced this kind of freezing problem. Flutter doctor didn't mention any problem. After building app freeze, I used to be flutter master channel. I switch my flutter to stable and build apk it work fine.

Command:

flutter channel stable