Test failure in QA-322/dollarsigns.js

// Test that '$id', '$db', and '$ref' are acceptable field names in
// the correct case (ie, subdoc) but not otherwise.
// SERVER-3231
coll.update(

{ n: 0 }

, { $set: { $id: 1, $db: 1, $ref: 1 }});
var gle = db.runCommand(

{ getLastError: 1 }

);
assert(gle.err != null, 'gleObj: ' + tojson(gle));
coll.update(

{ n: 0 }

,

{ n: 0 }

);

coll.update(

{ n: 0 }

, { $set: { 'x.$id': 1, 'x.$db': 1, 'x.$ref': 1 }});
var gle = db.runCommand(

{ getLastError: 1 }

);
assert(gle.err == null, 'gleObj: ' + tojson(gle));
coll.update(

{ n: 0 }

,

{ n: 0 }

);

Assert thrown from second update:

2013-12-12T12:39:01.485-0500 assert failed : gleObj:

{ "err" : "The DBRef $db field must be a String, not a NumberDouble", "code" : 55, "n" : 0, "connectionId" : 171, "ok" : 1 }

at src/mongo/shell/assert.js:7