Auto merge of #1507 - mati865:patch-2, r=gnzlbg

Test FreeBSD 12 on latest nightly

~~Let's see if [libc update](rust-lang/rust#63806) for Rust fixed it.~~

Fixes #1489

Author: bors

.cirrus.yml

@@ -22,7 +22,7 @@ task:
     - curl https://sh.rustup.rs -sSf --output rustup.sh
     - sh rustup.sh --default-toolchain nightly -y
     - . $HOME/.cargo/env
-    - rustup default nightly-2019-08-22
+    - rustup default nightly
   test_script:
     - . $HOME/.cargo/env
     - LIBC_CI=1 sh ci/run.sh x86_64-unknown-freebsd