https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96063
--- Comment #6 from Ian McInerney <ian.s.mcinerney at ieee dot org> --- They are showing up when I don't have -Wsystem-headers passed in on the command line. Compiling the attached test program with `g++ -Wmismatched-tags main.cpp` shows the warnings. All that is doing is including basically all public library headers.
