cleanup_orphaned_cmd.js failed on Buildbot Windows 64-bit 2008R2+

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Cleaning up more orphaned data...

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 m30000| 2013-08-21T23:46:44.302-0400 [conn1] runQuery called admin.$cmd { cleanupOrphaned: "foo.bar" }

 m30000| 2013-08-21T23:46:44.302-0400 [conn1] run command admin.$cmd { cleanupOrphaned: "foo.bar" }

 m30000| 2013-08-21T23:46:44.302-0400 [conn1] command: { cleanupOrphaned: "foo.bar" }

 m30000| 2013-08-21T23:46:44.302-0400 [conn1] orphaned data cleanup requested for foo.bar starting from { _id: MinKey }, removing next orphan range [{ _id: -35.0 },{ _id: -10.0 })

 m30000| 2013-08-21T23:46:44.302-0400 [conn1] warning: ns: foo.bar, min: { _id: -35.0 }, max: { _id: -10.0 } is already being processed for deletion.

 m30000| 2013-08-21T23:46:44.302-0400 [conn1] command admin.$cmd command: { cleanupOrphaned: "foo.bar" } ntoreturn:1 keyUpdates:0  reslen:144 0ms

{

	"ok" : 0,

	"errmsg" : "ns: foo.bar, min: { _id: -35.0 }, max: { _id: -10.0 } is already being processed for deletion."

}

assert failed

Error: Printing Stack Trace

    at printStackTrace (src/mongo/shell/utils.js:37:15)

    at doassert (src/mongo/shell/assert.js:6:5)

    at assert (src/mongo/shell/assert.js:14:5)

    at D:\slave\Windows_64bit_2008R2+\mongo\jstests\sharding\cleanup_orphaned_cmd.js:85:1

2013-08-21T23:46:44.318-0400 assert failed at src/mongo/shell/assert.js:7

failed to load: D:\slave\Windows_64bit_2008R2+\mongo\jstests\sharding\cleanup_orphaned_cmd.js