Merge pull request #112 from chainer/avoid-false-success-on-travis

Fix the false success on Travis-CI

.travis.yml

@@ -52,7 +52,7 @@ script:
   - flake8 --config=.flake8.cython .
   - autopep8 -r . --global-config .pep8 | tee check_autopep8
   - test ! -s check_autopep8
-  - for NP in 1 2 3; do PYTHONWARNINGS='ignore::FutureWarning,module::DeprecationWarning' mpiexec -n ${NP} nosetests -v -a '!nccl,!gpu'; done
+  - (for NP in 1 2 3; do PYTHONWARNINGS='ignore::FutureWarning,module::DeprecationWarning' mpiexec -n ${NP} nosetests -v -a '!nccl,!gpu' || exit $?; done)
   # - cd tests
   # - PYTHONWARNINGS='ignore::FutureWarning,module::DeprecationWarning' nosetests -a '!gpu,!slow' --with-doctest chainer_tests
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then