https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82614
--- Comment #13 from PeteVine <tulipawn at gmail dot com> --- Almost certainly not related, but there's been some sort of regression in gcov-dump from GCC 8 branch. Trying to dump any *.gcda file (ver. 8 included) ends like this: $ gcov-dump-8 Unified_cpp_js_src25.gcda Unified_cpp_js_src25.gcda:data:magic `gcda':version `504*' Unified_cpp_js_src25.gcda:warning:current version is `A80e' Unified_cpp_js_src25.gcda:stamp 532248120 Unified_cpp_js_src25.gcda:tag `000001ba' is invalid Unified_cpp_js_src25.gcda: 000001ba:3336454216:UNKNOWN