SO: 53723294 repro

main.dart

import 'package:flutter/material.dart';
import 'package:virgil/virgil.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Inferno(
        {
          '/': (context, argumets) => HomePage(),
          '/detailspage': (context, arguments) => DetailsPage(arguments),
        },
      ).home(context),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return _HomePageState();
  }
}

class _HomePageState extends State<HomePage> {
  int _currentIndex = 0;
  final List<Widget> _childnav = [
    TabPage("Movies"),
    TabPage("Series"),
    TabPage("Support")
  ];

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Scaffold(
      appBar: AppBar(
        title: Text('...'),
        actions: <Widget>[
          IconButton(
            icon: Icon(Icons.search),
            onPressed: () {},
          )
        ],
      ),
      body: _childnav[_currentIndex],
      bottomNavigationBar: BottomNavigationBar(
        onTap: (index) {
          print("Tab: $index");
          setState(() {
            _currentIndex = index;
          });
        },
        currentIndex: _currentIndex, //this property defines current active tab
        items: [
          BottomNavigationBarItem(
              icon: Icon(Icons.movie), title: Text('Movies')),
          BottomNavigationBarItem(icon: Icon(Icons.tv), title: Text('Series')),
          BottomNavigationBarItem(icon: Icon(Icons.help), title: Text('Help'))
        ],
      ),
    );
  }
}

class TabPage extends StatelessWidget {
  final String _title;

  const TabPage(this._title, {Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Column(
        children: <Widget>[
          Text(_title),
          FutureBuilder<List<String>>(
            future: _fetchlist(),
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                print(snapshot.data[1]);
                return Expanded(
                  child: ListView.builder(
                    itemCount: snapshot.data.length,
                    itemBuilder: (context, index) {
                      final val = snapshot.data[index];

                      return InkWell(
                        onTap: () {
                          final args = [
                            "string1",
                            1,
                            0.0
                          ];

                          Virgil.pushNamed(context, '/detailspage', arguments: args);
                        },
                        child: Container(
                          padding: EdgeInsets.all(5.0),
                          height: 300,
                          child: Text(val),
                        ),
                      );
                    },
                  ),
                );
              }
              return Center(
                child: CircularProgressIndicator(),
              );
            },
          )
        ],
      ),
    );
  }

  Future<List<String>> _fetchlist() {
    return Future.value(["One", "Two"]);
  }
}

class DetailsPage extends StatelessWidget {
  final List<Object> _args;

  const DetailsPage(this._args, {Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: <Widget>[
          SliverAppBar(
            title: Text(_args[0]),
            leading: IconButton(
              onPressed: () => Navigator.pop(context),
              icon: Icon(Icons.clear),
            ),
          )
        ],
      ),
    );
  }
}

pubspec.yml

name: stackoverflow
description: A new Flutter project.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  virgil: 0.8.0
  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages