id summary reporter owner description type status milestone component version severity resolution keywords cc 12917 string_ref not constructible from rvalue strings anymore Mathias Gaunard Marshall Clow "The change introduced in this commit is a regression https://github.com/boostorg/utility/commit/9960d9f395b79ee860e39064cd46961f76d2cb55 This breaks user code and is inconsistent with std::string_view. It is therefore undesirable." Bugs new To Be Determined utility Boost 1.64.0 Regression