https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105291
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Clang implements the wording correctly: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2036r3.html#pnum_3 So int a = 0; [a] (decltype(a)) { }; is ill-formed now. But I'm not convinced that's a good change to make as a DR.
