relay: [Modern rc.3] fragment data is null when using createFragmentContainer

in my posts.js file I have the QueryRenderer that passes the props to the child postLists component.

     <QueryRenderer
           environment={environment}
             query={GetAllPosts}
            render={({error, props}) => {
              if(props) {
                console.log(props.viewer)
                return <PostList posts={props.viewer}/>
              }

             return <Text style={{marginTop:20}}>Loading...</Text>
         }
        }/>

this is the post_list.js

  class PostList extends Component {
    render () {
       return (
       <View>
          {this.renderPosts(this.props.posts)}
       </View>
     )
   }
   renderPosts(posts) {
     if(!posts) {
        return <Text>No Posts</Text>
      }
     return posts.edges.map(post=>{
     return <PostItem post={post.node}/>
    })
   }
}

  export default createFragmentContainer(
    PostList,
    graphql`
    fragment post_list_posts on postEdges {
      node {
        ...post_item_post
      }
    }
  `
)

and the post_item.js

  class PostItem extends React.Component {
    render() {
      const post = this.props.post;
       return (
         <View>
           <Text>{post.content}</Text>
        </View>
      )
  }
}

 export default createFragmentContainer(
    PostItem,
    graphql`
       fragment post_item_post on postNode {
       Id
       content
      }
   `
  )

and finally the query itself,

    export default graphql`
      query getPostsQuery {
      viewer {
         edges {
             ...post_list_posts
         }
     }
  }
 `

Now when I console.log (props.viewer) I get

      { edges: 
   [ { __fragments: { post_list_posts: {} },
       __id: 'client:root:viewer:edges:0' },
     { __fragments: { post_list_posts: {} },
       __id: 'client:root:viewer:edges:1' },
     { __fragments: { post_list_posts: {} },
       __id: 'client:root:viewer:edges:2' },
     { __fragments: { post_list_posts: {} },
       __id: 'client:root:viewer:edges:3' },
     { __fragments: { post_list_posts: {} },
       __id: 'client:root:viewer:edges:4' } ] }