IssueTracker

Component used: Navigation
Version used: 1.0.0-rc01 and 1.0.0-beta02
Devices/Android versions reproduced on: any

I have nested navigation graph such as
<navigation
    android:id="@+id/main"
    app:startDestination="@+id/main">
...
    <navigation
        android:id="@+id/second"
        app:startDestination="@+id/second">
...
        <navigation
            android:id="@+id/third"
            app:startDestination="@+id/third">
...
            <fragment
                android:id="@+id/third">
                <deepLink app:uri="deeplink://sample" />
            </fragment>
        </navigation>
    </navigation>
</navigation>

When I handle deeplink, I clear flag FLAG_ACTIVITY_NEW_TASK, because it is product requirement, in code of navcontroller i see this code:
public boolean handleDeepLink(@Nullable Intent intent) {
...
        NavGraph graph = mGraph;
        for (int i = 0; i < deepLink.length; i++) {
            int destinationId = deepLink[i];
            NavDestination node = i == 0 ? mGraph : graph.findNode(destinationId);
            if (node == null) {
                throw new IllegalStateException("unknown destination during deep link: "
                        + NavDestination.getDisplayName(mContext, destinationId));
            }
            if (i != deepLink.length - 1) {
                // We're not at the final NavDestination yet, so keep going through the chain
                graph = (NavGraph) node;
                // Automatically go down the navigation graph when
                // the start destination is also a NavGraph
                while (graph.findNode(graph.getStartDestination()) instanceof NavGraph) {
                    graph = (NavGraph) graph.findNode(graph.getStartDestination());
                }
            } else {
                // Navigate to the last NavDestination, clearing any existing destinations
                navigate(node, node.addInDefaultArgs(bundle), new NavOptions.Builder()
                        .setPopUpTo(mGraph.getId(), true)
                        .setEnterAnim(0).setExitAnim(0).build(), null);
            }
        }
...
}
the variable "graph" created, but never used, and I clear my backstack not to "second", but to "main", and i cannot leave "third" screen after by press back button. I think .setPopUpTo() should use not mGraph.getId(), but graph.getId(). As long as it works as I wrote above, I have to use single navigation graph, and it is very bad solution.