+ if ((writeset_in = mm_realloc(sop->event_writeset_in, fdsz)) == NULL) {
+ /* Note that this will leave event_readset_in expanded.
+ * That's okay; we wouldn't want to free it, since that would
+ * change the semantics of select_resize from "expand the
+ * readset_in and writeset_in, or return -1" to "expand the
+ * *set_in members, or trash them and return -1."
+ */