https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107466
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2022-11-04 Status|UNCONFIRMED |NEW Component|c++ |libstdc++ Ever confirmed|0 |1 --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- That's not the standard. That text comes from a general requirement in [rand.req.gen] that applies to all engines and adaptors. The more specific requirements for subtract_with_carry_engine say it uses a specialization of linear_congruential_engine that is ill-formed. More specific requirements overrule more general ones. I've created a new LWG issue so this will get fixed in the standard. The best suggestion so far is that it should use linear_congruential_engine<uint_least32_t,...> instead of using its own result_type. Reassigning to component:libstdc++.