Build rayon-demo on stable too

Author: cuviper

.travis.yml

@@ -66,7 +66,13 @@ matrix:
         - cargo build --target $TARGET
       if: NOT type = pull_request
 
-    # rayon-demo has huge dependencies, so just test it once
+    # rayon-demo has huge dependencies, so limit its testing.
+    # build on stable, test on nightly (because of #[bench])
+    - rust: stable
+      os: linux
+      env: DEMO=1
+      script: cargo build -p rayon-demo
+      if: NOT type = pull_request
     - rust: nightly
       os: linux
       env: DEMO=1

README.md

@@ -106,19 +106,16 @@ parallel.
 
 ```
 > cd rayon-demo
-> cargo +nightly run --release -- nbody visualize
+> cargo run --release -- nbody visualize
 ```
 
 For more information on demos, try:
 
 ```
 > cd rayon-demo
-> cargo +nightly run --release -- --help
+> cargo run --release -- --help
 ```
 
-**Note:** While Rayon is usable as a library with the stable compiler, running
-its demos currently requires nightly Rust.
-
 ## Other questions?
 
 See [the Rayon FAQ][faq].

rayon-demo/src/main.rs

@@ -1,5 +1,4 @@
 #![cfg_attr(test, feature(test))]
-#![feature(conservative_impl_trait)]
 
 use std::env;
 use std::io;