Links to issues and PRs causing the breakage are appreciated.
The transmute ones are both from crossbeam-0.1.6:
error: transmute called with differently sized types:
[usize; 32] (2048 bits) to [std::sync::atomic::AtomicBool; 32] (256 bits)
Caused by https://github.com/rust-lang/rust/pull/33579. @aturon said he'll publish a new version of crossbeam.
unused import is https://github.com/rust-lang/rust/pull/33091.
Thanks @sanxiyn and @eddyb.
The "debug! macro undefined" ones are caused by https://github.com/rust-lang/rust/pull/34032 (c.f. https://github.com/rust-lang/rust/issues/34212) and fixed in https://github.com/rust-lang/rust/pull/34239, which hasn't been reviewed yet (cc @nrc).
The fix for the "debug! macro undefined" regressions landed.
Thanks for taking care of that @jseyfried!
Follow set errors are probably from https://github.com/rust-lang/rust/pull/33982, which removed the old follow rules.