[Bug libstdc++/127220] : clang rejects every dynamic width or precision ("{:{}}") in C++26 mode: __check_dynamic_spec is instantiated before its definition

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127220

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch submitted:
https://gcc.gnu.org/pipermail/gcc-patches/2026-September/730636.html