https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81857
TC <rs2740 at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rs2740 at gmail dot com --- Comment #1 from TC <rs2740 at gmail dot com> --- istreambuf_iterator is specified to call sbumpc() only on increment, not upon construction; the implementation is as specified. The copy_n aspect is https://cplusplus.github.io/LWG/issue2471.