implementing RFC 1623. This fixes #35897.#35915

Merged

bors merged 8 commits intorust-lang:masterfrom

llogiq:rfc-1623

Sep 2, 2016

Commits on Aug 24, 2016

fixed compile-fail test
llogiq
committed

Commits on Aug 28, 2016

fixed and extended tests once more
llogiq
committed

Commits on Aug 29, 2016