https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98721
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> --- Where both these 2 objects are null: (gdb) p sizestr $7 = "0", '\000' <repeats 15 times>, "\060\316\377\377\377\177\000\000P\316\377\377\377\177\000\000\210#\000\000\000\000\000\000\230\373;\367\377\177\000\000\000wF\367\377\177\000\000\340-;\367\377\177\000\000\340\267<\367\377\177\000\000\361̖\000\000\000\000" (gdb) p allocfn $8 = <tree 0x0> in access_ref::inform_access (access_mode mode) const function.