[Bug libstdc++/67537] [6 Regression] r225189 breaks building boost hana

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67537

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reported as https://llvm.org/bugs/show_bug.cgi?id=24770