clang 3.7 has a warning when std::move prevents it from using return value optimization: foo.cpp:44:25: error: moving a temporary object prevents copy elis

clang 3.7 has a warning when std::move prevents it from using return value optimization: foo.cpp:44:25: error: moving a temporary object prevents copy elision [-Werror,-Wpessimizing-move] auto result = std::move(worker.run()); foo.cpp:44:25: note: remove std::move call here auto result = std::move(worker.run());