https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120315
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > >I got undefined behavior (segfault, missing output or exceptions) when using > >a gcc 14 compiled library with a gcc 15 compiled executable. > > > Forward compatibility is not guaranteed; only backwards. No, neither direction is supported for C++20 yet. std::format is not ABI stable, and neither are any other C++20 features.