https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122903
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Sergei Trofimovich from comment #0) > 1. Is it expected that `gcc-14` / `gcc-master` differ in handling this code? No > 2. Is `T operator*();` a reasonable iterator implementaiton? It's fine for an input iterator to return by value instead of by reference. But it should be `T operator*() const` for any sane iterator. Non-const will work with C++17 algorithms (like std::all_of this testcase), but not C++20 algos.
