https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117887
--- Comment #9 from Sam James <sjames at gcc dot gnu.org> --- The history of https://github.com/chromium/chromium/commits/main/base/containers/flat_tree.h has a few GCC workarounds coming and going over the years. And presumably started with https://github.com/chromium/chromium/commit/872ad7d45da9c88ff23d052d3bcf9a2b80180faf, and I guess Qt 6.8 imports that.
