Hello world, I just stumbled across a compilation-error with the latest Boost release (1.71) of Boost.MSM for which I already provided a merge-request [1] a year ago, and which was merged to "develop" branch at that time, too. Still, the "master" branch lags this merge-request (and a lot more [2] from former years which are in "develop") but has some other unrelated merge-requests [3] merged in which are not in "develop". I would love seeing "develop" being merged into "master" (and maybe vise-versa) so that bugs for which fixes already exist will no longer be present in the next Boost release. Thanks for taking care of. Deniz [1] https://github.com/boostorg/msm/pull/15 [2] https://github.com/boostorg/msm/compare/master...develop [3] https://github.com/boostorg/msm/compare/develop...master