[Bug c++/120498] error: either all initializer clauses should be designated or none of them should be when designated-initialising nested union members(?) (same code accepted as C)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120498

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
What isn't helpful about them? It tells you exactly what is wrong with the
code:

"either all initializer clauses should be designated or none of them should be"

GCC didn't decide this is an error, the C++ standard did.