Fails to handle a combination of option and else

[Bob Harold]

AssertionError on this portion of a dhcpd.conf file:

class "AppleNBI-ppc" {
match if substring (option vendor-class-identifier, 0, 13) = "AAPLBSDPC/ppc";
if (option dhcp-message-type = 1) {
option vendor-encapsulated-options 08:04:81:00:00:09;
}
else {
option vendor-encapsulated-options 00:01:02:03:04:05:06:07;
}
}

If either the "option" line or the "else" section is removed, it works, but it does not handle the combination of those lines. This is part of a valid, working DHCP configuration file.

Description: Linux Mint 19.1 Tessa
Release: 19.1

python-iscpy_1.05-0ubuntu2_all.deb