Auto merge of #5509 - Eh2406:use_the_new, r=alexcrichton
authorbors <bors@rust-lang.org>
Thu, 10 May 2018 18:18:09 +0000 (18:18 +0000)
committerbors <bors@rust-lang.org>
Thu, 10 May 2018 18:18:09 +0000 (18:18 +0000)
Use the new stable

The new rust release has stabilized `Box::leak` and `impl Iterator` lets use them!


Trivial merge