https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
--- Comment #1 from Matthias Kretz <kretz at kde dot org> --- Same issue for -Wunused-variable
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
--- Comment #1 from Matthias Kretz <kretz at kde dot org> --- Same issue for -Wunused-variable