https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91711
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- The problem is that 0ul can convert to std::size_t but is also a null pointer constant. Fixed by using an expression that isn't a valid null pointer constant.