See-Also: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31923

--- parted-3.2/libparted/labels/bsd.c.old	2014-06-15 18:17:43.000000000 +0000
+++ parted-3.2/libparted/labels/bsd.c	2019-08-05 05:48:52.914401379 +0000
@@ -364,7 +364,7 @@
 		max_part = i;
 	}
 
-	label->d_npartitions = PED_CPU_TO_LE16 (max_part) + 1;
+	label->d_npartitions = PED_CPU_TO_LE16 (max_part + 1);
 	label->d_checksum = xbsd_dkcksum (label);
 
 	alpha_bootblock_checksum (bsd_specific->boot_code);