downgrade rustc (tikv#1479)

.travis.yml

@@ -15,6 +15,13 @@ matrix:
          apt:
             sources: ['ubuntu-toolchain-r-test']
             packages: ['g++-4.8', 'zlib1g-dev', 'libbz2-dev', 'libsnappy-dev', 'curl', 'libdw-dev', 'libelf-dev', 'elfutils', 'binutils-dev']
+    - os: linux
+      rust: nightly
+      env: COMPILER=g++-4.8 RUSTC_DATE=2016-08-06 ENABLE_FEATURES=default SKIP_TESTS=true CXX=g++-4.8
+      addons:
+         apt:
+            sources: ['ubuntu-toolchain-r-test']
+            packages: ['g++-4.8', 'zlib1g-dev', 'libbz2-dev', 'libsnappy-dev', 'curl', 'libdw-dev', 'libelf-dev', 'elfutils', 'binutils-dev']
     - os: osx
       rust: nightly
       env: COMPILER=clang++ RUSTC_DATE=2016-12-19 CXX=clang++

docker/release_dockerfile

@@ -7,7 +7,7 @@ RUN yum update -y && \
     yum install -y devtoolset-4-gcc-c++ python27 && \
     yum clean all
 
-RUN curl -sSf https://static.rust-lang.org/rustup.sh |  sh -s -- --date=2016-12-19 --disable-sudo -y --channel=nightly
+RUN curl -sSf https://static.rust-lang.org/rustup.sh |  sh -s -- --date=2016-08-06 --disable-sudo -y --channel=nightly
 
 ADD https://github.com/pingcap/tikv/archive/master.tar.gz /master.tar.gz
 

docker/rust_dockerfile

@@ -25,4 +25,4 @@ RUN cd / && \
     cd / && \
     rm -rf /rocksdb-4.12.fb /rocksdb.tar.gz
 
-RUN curl -sSf https://static.rust-lang.org/rustup.sh | sh -s  -- --date=2016-12-19 --disable-sudo -y --channel=nightly
+RUN curl -sSf https://static.rust-lang.org/rustup.sh | sh -s  -- --date=2016-08-06 --disable-sudo -y --channel=nightly

src/lib.rs

@@ -12,6 +12,8 @@
 // limitations under the License.
 
 #![crate_type = "lib"]
+#![allow(stable_features)]
+#![feature(mpsc_recv_timeout)]
 #![feature(test)]
 #![feature(btree_range, collections_bound)]
 #![feature(fnbox)]