https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111934
--- Comment #3 from vincenzo Innocente <vincenzo.innocente at cern dot ch> --- with gcc version 14.0.0 20231024 (experimental) [master r14-4877-g724badcadf8] (GCC) I get the same ICE. Please note that one needs to include "iostream" (in my test compile with "-DICE") to trigger the ICE. w/o it just emits the syntax error as one would expect.
