359   int write_fd = write_end.descriptor();  in TEST()  local
360   file write_copy = write_end.dup(write_fd);  in TEST()
364   FMT_POSIX(close(write_fd));  in TEST()
369   write_copy.dup2(write_fd);  // "undo" close or dtor will fail  in TEST()
402   int write_fd = write_end.descriptor();  in TEST()  local
403   file write_copy = write_end.dup(write_fd);  in TEST()
408   FMT_POSIX(close(write_fd));  in TEST()
411   write_copy.dup2(write_fd);  // "undo" close or dtor will fail  in TEST()
417   int write_fd = write_end.descriptor();  in TEST()  local
418   file write_copy = write_end.dup(write_fd);  in TEST()
430         FMT_POSIX(close(write_fd));  in TEST()
434   write_copy.dup2(write_fd);  // "undo" close or dtor of buffered_file will fail  in TEST()