https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121647
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- This is not valid C++26. https://eel.is/c++draft/stmt.expand#2 says that expansion stmt body is control-flow-limited, and https://eel.is/c++draft/stmt.label#3 explains that. Note, expansion stmt body can't contain even any kind of named labels: https://eel.is/c++draft/stmt.label#4 If clang branch accepts it, either it doesn't implement the final wording or it is buggy.
