https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90627
--- Comment #2 from bogi788 at hotmail dot com --- Created attachment 46414 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46414&action=edit gcc 8.3.0 preprocessed source The .i file was generated using gcc 8.3.0, since (as mentioned in the bugreport) gcc 9.1.0 writes an almost empty file.