pillar inconsistency

pillar/top.sls
=====
base:
  '*':
    - a
    - b
    - c

pillar/a.sls
=======
foo:
  a: 42

pillar/b.sls
=======
foo:
  b: 13


pillar/c.sls
=======
include:
  - d

bar:
  c: 72

pillar/d.sls
=======
bar:
  d: 314


# salt-call pillar.get foo
local:
    ----------
    a:
        42
    b:
        13

# salt-call pillar.get bar
local:
    ----------
    d:
        314