@witty-crayon-22786: I did a test on master branch and it seems in v1 engine the behavior of rglobs for ** is matching 1 or more dirs, which means RGlobs.to_filespecs does not have any effect on v1 engine. is it really the case or am I missing something here? if it is true, then the behavior of rglobs will differ between v1 and v2 engine