TestMachinePrincipalUnits fails on ppc64el/gccgo-go

[Curtis Hovey]

run-unit-tests-trusty-ppc64el build #2357 http://juju-ci.vapour.ws:8080/job/run-unit-tests-trusty-ppc64el/2357/console
This is a recent regression that just affects ppc64el/gccgo-go
FAIL: machine_test.go:1038: TestMachinePrincipalUnits.pN44_github_com_juju_juju_state_test.MachineSuite

SetUpTest
[LOG] 0:00.006 INFO juju.state opening state, mongo addresses: ["localhost:34535"]; entity <nil>
[LOG] 0:00.006 DEBUG juju.state dialing mongo
[LOG] 0:00.008 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:34535"
[LOG] 0:00.009 DEBUG juju.state connection established
[LOG] 0:00.027 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:34535"
[LOG] 0:00.027 INFO juju.state initializing environment, owner: "test-admin@local"
[LOG] 0:00.028 INFO juju.state info: &mongo.MongoInfo{Info:mongo.Info{Addrs:[]string{"localhost:34535"}, CACert:"-----BEGIN CERTIFICATE-----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\n3RIWtVkbaTM=\n-----END CERTIFICATE-----\n"}, Tag:names.Tag(nil), Password:""}
[LOG] 0:00.028 INFO juju.state starting presence watcher
[LOG] 0:00.032 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:34535"
SetUpTest done
[LOG] 0:00.475 INFO juju.mongo dialled mongo successfully on address "127.0.0.1:34535"
test 0
test 1
test 2
machine_test.go:1102:
    c.Assert(sortedUnitNames(got), gc.DeepEquals, expect)
... obtained []string = []string{"s2/2", "s3/2"}
... expected []string = []string{"s2/2", "s3/1"}

[LOG] 0:00.627 INFO juju.testing reset successfully reset admin password
2015-02-12 09:34:23 INFO juju.testing mgo.go:514 reset successfully reset admin password
2015-02-12 09:35:07 INFO juju.testing mgo.go:514 reset successfully reset admin password
2015-02-12 09:35:32 INFO juju.testing mgo.go:514 reset successfully reset admin password
OOPS: 786 passed, 1 FAILED

The first fail is
Revision build: 2328 gitbranch:master:github.com/juju/juju 8020d93
The last pass for master is
Revision build: 2327 gitbranch:master:github.com/juju/juju 4bfd005

The only suspect commit is
Commit 8020d93 Merge pull request #1586 from anastasiamac/state-block …