Fedora clearly sees this though but it does not break their builds so I am guessing they have not reported it upstream yet? https://koji.fedoraproject.org/koji/taskinfo?taskID=126644404 https://kojipkgs.fedoraproject.org//work/tasks/4404/126644404/build.log For the record, clang has no warning like this because with how clang is currently architectured, the vast majority of warnings happen in the front end, where there is usually not enough reliable information available to make these kind of warnings be accurate, at least from my understanding. Cheers, Nathan