Perhaps its time to drop i686.
There is some time bitness mismatch with recent rawhide which I am not sure is worth fixing

../date.c: In function ‘date_format_rfc822_en_gmt’:
../date.c:485:19: error: passing argument 1 of ‘gmtime_r’ from incompatible pointer type [-Wincompatible-pointer-types]
  485 |         gmtime_r (&datetime, &dt);
      |                   ^~~~~~~~~
      |                   |
      |                   gint64 * {aka long long int *}
In file included from /usr/include/glib-2.0/glib/gtypes.h:41,
                 from /usr/include/glib-2.0/glib/galloca.h:34,
                 from /usr/include/glib-2.0/glib.h:32,
                 from ../date.h:24,
                 from ../date.c:35:
/usr/include/time.h:155:54: note: expected ‘const time_t * restrict’ {aka ‘const long int * restrict’} but argument is of type ‘gint64 *’ {aka ‘long long int *’}
  155 | extern struct tm *gmtime_r (const time_t *__restrict __timer,
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
make[3]: *** [Makefile:582: ../date.o] Error 1

Liferea seems like a good leaf candidate for it.