With the changes in #rustlang 1.26 and 1.27 it seems the printed books now need to be updated.
Replying to @hoodie_de
All code is still backwards compatible, so it’s only slightly out of date idiomatically. Such is always th case with printed books.
3:56 AM - 22 Jun 2018
0 replies
0 retweets
2 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.