[Bug libstdc++/81808] 27_io /basic_fstream/53984.cc failure on AIX

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81808

--- Comment #2 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 41967
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41967&action=edit
Pre-processed source of testcase