[Bug c++/106072] Bogus -Wnonnull warning breaks rust bootstrap

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106072

--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 53215
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53215&action=edit
Original preprocessed testcase.