> db.foo.find().addOption(64)
{ "_id" : ObjectId("52aa11f96483916c3e9dcddd"), "a" : 1, "b" : 2 }
{ "_id" : ObjectId("52af45da2d4292951ad56038"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56039"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603a"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603b"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603c"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603d"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603e"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5603f"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56040"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56041"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56042"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56043"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56044"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56045"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56046"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56047"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56048"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad56049"), "a" : 1 }
{ "_id" : ObjectId("52af45da2d4292951ad5604a"), "a" : 1 }
Type "it" for more
2013-12-16T10:28:39.071-0800 ERROR: MessagingPort::call() wrong id got:85 expect:5
  toSend op: 2004
  response msgid:134
  response len:  326736
  response op:  1
  remote: 127.0.0.1:27017
2013-12-16T10:28:39.072-0800 Assertion failure false src/mongo/util/net/message_port.cpp 269
2013-12-16T10:28:39.074-0800 0x100131a0b 0x1000f09b2 0x1000def82 0x1000f6b09 0x1000f6ba1 0x100031b09 0x100031d5d 0x10005a61e 0x10002f34c 0x10003ae83 0x1000bf6af 0x1000a9a80 0x1001eae60 0x1ab149b06362 
 0   mongo                               0x0000000100131a0b _ZN5mongo15printStackTraceERSo + 43
 1   mongo                               0x00000001000f09b2 _ZN5mongo10logContextEPKc + 114
 2   mongo                               0x00000001000def82 _ZN5mongo12verifyFailedEPKcS1_j + 274
 3   mongo                               0x00000001000f6b09 _ZN5mongo13MessagingPort4recvERKNS_7MessageERS1_ + 1167
 4   mongo                               0x00000001000f6ba1 _ZN5mongo13MessagingPort4callERNS_7MessageES2_ + 49
 5   mongo                               0x0000000100031b09 _ZN5mongo18DBClientConnection4callERNS_7MessageES2_bPSs + 91
 6   mongo                               0x0000000100031d5d _ZThn72_N5mongo18DBClientConnection4callERNS_7MessageES2_bPSs + 13
 7   mongo                               0x000000010005a61e _ZN5mongo14DBClientCursor4initEv + 340
 8   mongo                               0x000000010002f34c _ZN5mongo12DBClientBase5queryERKSsNS_5QueryEiiPKNS_7BSONObjEii + 180
 9   mongo                               0x000000010003ae83 _ZN5mongo18DBClientConnection5queryERKSsNS_5QueryEiiPKNS_7BSONObjEii + 133
 10  mongo                               0x00000001000bf6af _ZN5mongo9mongoFindEPNS_7V8ScopeERKN2v89ArgumentsE + 783
 11  mongo                               0x00000001000a9a80 _ZN5mongo7V8Scope10v8CallbackERKN2v89ArgumentsE + 116
 12  mongo                               0x00000001001eae60 _ZN2v88internalL21Builtin_HandleApiCallENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE + 464
 13  ???                                 0x00001ab149b06362 0x0 + 29348747830114

db.foo.drop()
for (i=0;i < 10000; i++) { db.foo.insert({a:1});}
db.foo.find().addOption(64)