First occurred at https://mci.10gen.com/ui/task/mongodb_mongo_master_linux_32_debug_b79c42855e9c9b8a95a6137b9486f95810d0036d_13_11_06_19_34_08_sharding_linux_32

Logs show:

Error: Printing Stack Trace
at printStackTrace (src/mongo/shell/utils.js:38:15)
at doassert (src/mongo/shell/assert.js:6:5)
at Function.assert.eq (src/mongo/shell/assert.js:32:5)
at testGridFS (/data/mci/git@github.commongodb/mongo.git/master/jstests/sharding/gridfs.js:28:12)
at /data/mci/git@github.commongodb/mongo.git/master/jstests/sharding/gridfs.js:63:1
2013-11-06T22:17:03.276+0000 [0] != [1] are not equal : undefined at src/mongo/shell/assert.js:7
failed to load: /data/mci/git@github.commongodb/mongo.git/master/jstests/sharding/gridfs.js