Hi, I noticed a long-standing bug, that the 'name' argument of mkpart seems to be ignored. It happens only with debug disabled on compilation '--disable-debug' (as e.g. Arch Linux does for its package). The reason is, that from parted.c the function ped_partition_set_name is called within an assert. I believe the code should be rather something like this (which works for me):
--- parted/parted.c.orig 2019-01-27 11:27:54.742081238 +0100 +++ parted/parted.c 2019-01-27 11:28:18.049039748 +0100 @@ -806,7 +806,8 @@ /* set minor attributes */ if (part_name) - PED_ASSERT (ped_partition_set_name (part, part_name)); + if (!ped_partition_set_name (part, part_name)) + goto error; free (part_name); /* avoid double-free upon failure */ part_name = NULL; if (!ped_partition_set_system (part, fs_type)) --- Best regards, Oliver