Allow beta to fail CI

sgrif · sgrif · commit 70d952a5c561 · 2017-07-23T05:27:31.000-04:00
Until rust-lang/rust#43153 is fixed, our builds are failing on beta.
diff --git a/.travis.yml b/.travis.yml
@@ -39,6 +39,7 @@ script:
 matrix:
   allow_failures:
     - rust: nightly
+    - rust: beta
   include:
   - rust: nightly-2017-06-06
     env: CLIPPY_AND_COMPILE_TESTS=YESPLEASE
