filter_retcode    539 maint/gnulib/lib/pipe-filter-gi.c     return filter_retcode (filter);
filter_retcode    547 maint/gnulib/lib/pipe-filter-gi.c           return filter_retcode (filter);
filter_retcode    559 maint/gnulib/lib/pipe-filter-gi.c   ret = filter_retcode (filter);