lottie-android: Fatal signal 11 crash on Android 7.0

This has been happening for a little while for us apparently, but we don’t get crash logs reported from it since the crash seems to be occurring in native code. It happens on the latest version of Lottie (3.3.0) and previous ones.

We have an an animation that causes our app to crash whenever we play it forward or backward. It only crashes on devices running 7.0 (pre-7.0 and post-7.0, including 7.x.x are fine). Here’s what I’m seeing in the Logcat:

A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x4 in tid 7235 (RenderThread)
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
pid: 3801, tid: 4185, name: RenderThread  >>> com.transloc.microtransit.dev.debug <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4
    r0 8ed30730  r1 00000000  r2 00000044  r3 af30a4b1
    r4 8e82b478  r5 8e82b478  r6 00000000  r7 849e4680
    r8 8e82b278  r9 00000001  sl 8597bf00  fp 8e82b1c0
    ip af369628  sp 8e82b110  lr af31a759  pc af34e29a  cpsr a00f0030
backtrace:
    #00 pc 0006329a  /system/lib/libhwui.so
    #01 pc 0006299b  /system/lib/libhwui.so
    #02 pc 000625d5  /system/lib/libhwui.so
    #03 pc 00023e5f  /system/lib/libhwui.so
    #04 pc 000258b3  /system/lib/libhwui.so
    #05 pc 00028d51  /system/lib/libhwui.so (_ZN7android10uirenderer12renderthread12RenderThread10threadLoopEv+80)
    #06 pc 0000e3e5  /system/lib/libutils.so (_ZN7android6Thread11_threadLoopEPv+140)
    #07 pc 00068a15  /system/lib/libandroid_runtime.so (_ZN7android14AndroidRuntime15javaThreadShellEPv+80)
    #08 pc 000474e3  /system/lib/libc.so (_ZL15__pthread_startPv+22)
    #09 pc 00019dcd  /system/lib/libc.so (__start_thread+6)

I’ve reproduced the issue by starting a new empty project that only has a LottieAnimationView.

Here’s the layout:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.airbnb.lottie.LottieAnimationView
        android:id="@+id/pin_button"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_gravity="center"
        app:lottie_fileName="pinning_animation.json" />

</FrameLayout>

And here’s the Activity:

package com.transloc.lottietest

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.airbnb.lottie.LottieAnimationView
import com.airbnb.lottie.RenderMode

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val pinButton = findViewById<LottieAnimationView>(R.id.pin_button)

        pinButton.setOnClickListener {
            pinButton.resumeAnimation()
        }
    }
}

The animation will play briefly, then the app will freeze momentarily, and then it will crash. I’ve found that setting the render mode to SOFTWARE will work around the issue.