Comment # 17 on bug 918158 from Thomas Blume

The dependencies of the unit that causes the crash look really wrong.
We have a lot of null pointers:

#7  unit_free (u=0xa2d880) at src/core/unit.c:446
446                    bidi_set_free(u, u->dependencies[d]);
(gdb) print *u
$20 = {manager = 0xa033c0, type = UNIT_TARGET, load_state = UNIT_LOADED,
merged_into = 0x0, id = 0xa27710 "shutdown.target", 
  instance = 0x0, names = 0xa292e0, dependencies = {0x0, 0x0, 0x0, 0x0,
0xa2a960, 0x0, 0x0, 0xa2c620, 0x0, 0x0, 0x0, 0x0, 
    0x0, 0xa2a5a0, 0xa37020, 0xa2c260, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa2abe0,
0xa2a6e0}
[...]

We might have a duplicate of:

https://bugzilla.redhat.com/show_bug.cgi?id=1124843