"Cannot hit test a render box that has never been laid out" error when navigating back.

[D M]

Hi all,

   I have tried the sample app to move from one page to another. Here is the snippet.

class NewReadingWidget extends StatefulWidget {

}

Navigator.of(context).push(
    new MaterialPageRoute(
        builder: (context) => new NewReadingWidget()
    )
);

When the NewReadingWidget is opened, it has the left arrow. When I click on the arrow, I get this error message. Navigation to previous wdiget does not work. My home widget is also of type StatefulWidget. 

07-13 20:15:49.753 5295-5311/com.mimosa.lpg E/flutter: [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:

    Cannot hit test a render box that has never been laid out.

    The hitTest() method was called on this RenderBox:

      RenderStack#66f67 NEEDS-LAYOUT NEEDS-PAINT

    Unfortunately, this object's geometry is not known at this time, probably because it has never been laid out. This means it cannot be accurately hit-tested. If you are trying to perform a hit test during the layout phase itself, make sure you only hit test nodes that have completed layout (e.g. the node's children, after their layout() method has been called).

    #0      RenderBox.hitTest.<anonymous closure> (package:flutter/src/rendering/box.dart:1838:11)

    #1      RenderBox.hitTest (package:flutter/src/rendering/box.dart:1861:6)

    #2      _RenderCustomMultiChildLayoutBox&RenderBox&ContainerRenderObjectMixin&RenderBoxContainerDefaultsMixin.defaultHitTestChildren (package:flutter/src/rendering/box.dart:2190:17)