https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85805
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Target| |avr Status|UNCONFIRMED |WAITING Last reconfirmed| |2018-05-16 Component|c |target Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Note GCC 4.8 is long out of maintainance and GCC 4.8.1 is a particularly old version from the branch. Please try a still supported compiler which would be GCC 6.4, GCC 7.3 or GCC 8.1. If you can't do that please try at least the latest GCC 4.8 based compiler which is GCC 4.8.5.