possible bug: DrawerLayout must be measured with MeasureSpec.EXACTLY when using ConstraintLayout

About this issue

trying to put drawer under the toolbar as explained here and getting DrawerLayout must be measured with MeasureSpec.EXACTLY exception.

after some playing around with it i have noticed it’s only happening if my XML root view is ConstraintLayout. if i change it to RelativeLayout, it working fine.

NOT working (getting exception mentioned above):

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout
    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.v7.widget.Toolbar
        <!--some values-->
     />

    <FrameLayout
        android:id="@+id/drawerContainer"
               <!--some values-->
     >

        <ScrollView
           <!--some values-->
     >
            <!--layout content-->

        </ScrollView>
    </FrameLayout>
</android.support.constraint.ConstraintLayout>

working:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    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.v7.widget.Toolbar
        <!--some values-->
     />

    <FrameLayout
        android:id="@+id/drawerContainer"
               <!--some values-->
     >

        <ScrollView
           <!--some values-->
     >
            <!--layout content-->

        </ScrollView>
    </FrameLayout>
</RelativeLayout>

Details

• [ ] Used library version 6.0.9
• [ ] Used support library version 27.1.1
• [ ] Used gradle build tools version 3.1.3
• [ ] Used tooling / Android Studio version 3.1.3
• [ ] Other used libraries, potential conflicting libraries using the kotlin wrapper library