[Bug preprocessor/62086] A bug with option -fextended-identifiers

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62086

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. you're not compiling it as C++11, you're compiling it as C89