diff --git a/dune/solvers/solvers/criterion.hh b/dune/solvers/solvers/criterion.hh index ff1c473a7f83889efad170064e54e5445ef129ec..259f8f2bbd399333dd556c5f64470f9c4dd5e0d2 100644 --- a/dune/solvers/solvers/criterion.hh +++ b/dune/solvers/solvers/criterion.hh @@ -78,7 +78,7 @@ namespace Dune { template<class F, std::enable_if_t<std::is_convertible<std::result_of_t<F()>, std::string>::value, int> = 0> Criterion(F&& f, const std::string& header) : - f_( [=]() {return std::make_tuple(false, f());} ), + f_( [=]() mutable {return std::make_tuple(false, f());} ), header_(header) {}