https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61489
--- Comment #5 from Deniz Bahadir <D.Bahadir at GMX dot de> --- Thanks again. Then I need to appologize for misunderstanding the meaning of the warning-flag. Because of several internet-sources, like the one I cited, I always thought that the cases of addr3 and addr7 were the prefered way of explicitely forcing zero-initialization of all struct members (especially if the number of struct-members are subject to change in the future). If I understand you correctly, a better/cleaner way which achieves the exact same is using the cases of addr2 and addr6. Then I would rephrase my original statement and suggest that no warning will be issued for cases of addr2, addr6 and addr9.