[Bug libstdc++/93205] std::discrete_distribution's operator>> causes OOM

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93205

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far, but I plan to backport it to gcc-8 and gcc-9 too.