https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82614
--- Comment #15 from PeteVine <tulipawn at gmail dot com> --- No, that's not it - gcov-dump 6/7 have no problem dumping previous versions. I'm just not sure if the problem with gcov-dump-8 is architecture specific (ARM) or it's something to do with my setup. I'm going to leave it there.