--- unix/selector.c.orig	2020-08-20 14:43:29.000000000 -0500
+++ unix/selector.c	2020-08-20 14:43:54.000000000 -0500
@@ -1030,7 +1030,7 @@
 		  &tmp_except_set,
 		  &ts, &sigmask);
     if (err < 0) {
-	if (errno == EBADF || errno == EBADFD)
+	if (errno == EBADF)
 	    /* We raced, just retry it. */
 	    goto retry;
 	goto out;