https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79307
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Note -fsanitize=address complains about this (though ==3971==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffef8cabe50 at pc 0x0000004011db bp 0x7ffef8cabe10 sp 0x7ffef8cabe08 rather than use after scope I was expecting. CCing Martin.