try to fix pipeline 2

.gitlab-ci.yml

@@ -9,7 +9,7 @@ stages:
 build-centos:
     stage: build
     script:
-      - source /opt/rh/devtoolset-7/enable
+      - source /opt/rh/devtoolset-8/enable
       - mkdir build
       - cd build
       - cmake3 ..

src/include/ranges/mrange.cc.h

@@ -64,7 +64,7 @@ namespace CNORXZ
     {
 	return std::make_tuple
 	    ( iter<Is,NI>
-	      ( [&ipack](auto i) { return std::get<i>(ipack)->pmax(); },
+	      ( [&](auto i) { return std::get<i>(ipack)->pmax(); },
 		[](const auto&... as) { return (as * ...); } )...,
 	      SPos<1>() );
     }