Salut! https://cgit.kde.org/kactivities.git/commit/?id=47a4055e4d6fbf4eb826f255d040620ef23f11c1
It appears to me that this is a binary incompatible change. https://community.kde.org/Policies/Binary_Compatibility_Issues_With_C%2B%2B > You cannot...For existing functions of any type:change its signature. This > includes:changing any of the types of the arguments in the parameter list, > including changing the const/volatile qualifiers of the existing parameters > (instead, add a new method) HS