https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91703
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |avr Status|UNCONFIRMED |WAITING Last reconfirmed| |2019-09-09 Component|ada |middle-end Host| |mingw64 Version|unknown |5.4.0 Ever confirmed|0 |1 Build| |mingw64 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Guessing some bits. Note GCC 5 is no longer supported, you should look for a newer version of the AVR toolchain.