FloatingActionButton Android 6 Crash (using 27.1.1 of the design library)

activity_demo.xml

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_gravity="center" />

</FrameLayout>

DemoActivity.kt

import android.animation.ValueAnimator
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.design.widget.FloatingActionButton

class DemoActivity : AppCompatActivity() {

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

        val fab = findViewById<FloatingActionButton>(R.id.fab)
        animateElevation(fab, 0F, 100F)
    }

    private fun animateElevation(fab: FloatingActionButton, from: Float, to: Float) {
        val anim = ValueAnimator.ofFloat(0F, 1F)
        anim.duration = 1000
        anim.addUpdateListener {
            fab.compatElevation = from + (it.animatedValue as Float) * (to - from)
        }
        anim.start()
    }
}

dependencies.gradle

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:design:27.1.1'
}

DemoActivity.kt:20 will crash on Android 6 devices. The solution for us was to not animate the elevation. The setCompatElevation function works perfectly when called once.