Comment 11 for bug 1876600

Validated systemd/229-4ubuntu21.29 from xenial-proposed, according to test case from description:

ubuntu@systemd-cookie-xenial:~$ dpkg -l systemd | grep systemd
ii systemd 229-4ubuntu21.29 amd64 system and service manager
ubuntu@systemd-cookie-xenial:~$ gcc -Wall test.c -o cookie -lsystemd -g
ubuntu@systemd-cookie-xenial:~$ gdb --batch --command=test.gdb --args ./cookie
Breakpoint 1 at 0x400ddb: file test.c, line 38.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
(65s) cookie: 0x00010000 reply-cookie: 0x00010000

Breakpoint 1, print_unit_path (bus=0x603040) at test.c:38
38 r = sd_bus_message_new_method_call(bus, &m,
$1 = 0x10000
$2 = 0xffffff00
(65s) cookie: 0x80000000 reply-cookie: 0x80000000
(129s) cookie: 0x80010000 reply-cookie: 0x80010000
(188s) cookie: 0x80020000 reply-cookie: 0x80020000