movemail segmentation fault

pi@ghost: ~/delme 2023-05-24 03:00:49
$ > a
pi@ghost: ~/delme 2023-05-24 03:00:56
$ > b
pi@ghost: ~/delme 2023-05-24 03:00:57
$ movemail -P a b
Segmentation fault
pi@ghost: ~/delme 2023-05-24 03:01:01
$ movemail -P 0 a b
Segmentation fault
pi@ghost: ~/delme 2023-05-24 03:01:04
$ movemail --version
movemail (GNU Mailutils) 3.16
Copyright (C) 2007-2023 Free Software Foundation, inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
pi@ghost: ~/delme 2023-05-24 03:06:11
$ movemail -P rwx a b
Segmentation fault
pi@ghost: ~/delme 2023-05-24 03:06:18
$ movemail -P 666 a b
Segmentation fault
pi@ghost: ~/delme 2023-05-24 03:06:25
$ movemail -P a+r a b
Segmentation fault