https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64849
--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> --- Valgrind shows 5 instances of: ==20889== Invalid read of size 8 ==20889== at 0x401241: __final_main_T2.3409 (in /home/jerry/prs/pr64506/a.out) ==20889== by 0x400D51: __final_main_T3.3400 (in /home/jerry/prs/pr64506/a.out) ==20889== by 0x400EF5: MAIN__ (in /home/jerry/prs/pr64506/a.out) ==20889== by 0x40147C: main (in /home/jerry/prs/pr64506/a.out)