The patch that added cv_set_call_checker_flags() back in 5.21.4 was conspicuously missing a corresponding cv_get_call_checker_flags(). I've just added it in commit 71c697dea4f5a96ca9a9867eef07455c74f502f5. Please raise any doubts about the API now. I need this part of the API to be sorted out, with an expectation that it be stable, for the purposes of the next iteration of some of my CPAN modules. It directly affects my modules that are concerned with making call checkers available on older perls (Devel::CallChecker) and to pure Perl code (B::CallCheker), and the parallel API for parsing (Devel::CallParser), the latter of which underlies some other modules requiring updates such as Memoize::Lift. -zeframThread Next