Switch g++7 to c++14 mode due to a bug with c++17

pdimov · pdimov · commit b84891ba9db6 · 2017-07-04T16:32:34.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -64,7 +64,7 @@ matrix:
     - os: linux
       dist: trusty
       compiler: g++-7
-      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++17
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++14
       addons:
         apt:
           packages:
