Sample project with failing preview

activity_main.xml

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

    <com.jolandaverhoef.test.TestView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>

</android.support.constraint.ConstraintLayout>

MainActivity.kt

package com.jolandaverhoef.test

import android.support.v7.app.AppCompatActivity
import android.os.Bundle

class MainActivity : AppCompatActivity() {

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

TestView.kt

package com.jolandaverhoef.test

import android.content.Context
import android.support.constraint.ConstraintLayout
import android.util.AttributeSet
import android.view.View

class TestView : ConstraintLayout {

    constructor(context: Context) : super(context) {
        View.inflate(context, R.layout.view_test, this)
    }

    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) {
        View.inflate(context, R.layout.view_test, this)
    }

    constructor(context: Context, attrs: AttributeSet?, attributeSetId: Int) : super(context, attrs, attributeSetId) {
        View.inflate(context, R.layout.view_test, this)
    }
}

view_test.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       tools:parentTag="android.support.constraint.ConstraintLayout">

    <TextView
            android:id="@+id/text_test"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:text="test"/>

</merge>