Mongo Geo Update

db.createCollection("points");
db.points.ensureIndex( { loc : "2d" } )

for(var x = 0; x < 10; x = x + 1) {
  for(var y = 0; y < 10; y = y + 1) {
    db.points.insert({"loc": [x, y]});
  }
}


// Run geo $inc
db.points.update({"loc" : {"$within" :  {"$center" : [[5,5], 2]}}}, {'$inc' : { 'test' : 1}}, false, true);

/////////////////
// FAILS: 
// 0x10006e90b 0x10007d47c 0x10015fc70 0x100161759 0x100269532 0x10026b319 0x1003a5822 0x1003b6d84 0x7fff884fa8b6 0x7fff884fa769 
//  0   mongod                              0x000000010006e90b _ZN5mongo12sayDbContextEPKc + 171
//  1   mongod                              0x000000010007d47c _ZN5mongo8assertedEPKcS1_j + 284
//  2   mongod                              0x000000010015fc70 _ZN5mongo14_updateObjectsEbPKcRKNS_7BSONObjES2_bbbRNS_7OpDebugEPNS_11RemoveSaverE + 6864
//  3   mongod                              0x0000000100161759 _ZN5mongo13updateObjectsEPKcRKNS_7BSONObjES2_bbbRNS_7OpDebugE + 313
//  4   mongod                              0x0000000100269532 _ZN5mongo14receivedUpdateERNS_7MessageERNS_5CurOpE + 1170
//  5   mongod                              0x000000010026b319 _ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_8SockAddrE + 5513
//  6   mongod                              0x00000001003a5822 _ZN5mongo10connThreadEPNS_13MessagingPortE + 546
//  7   mongod                              0x00000001003b6d84 thread_proxy + 132
//  8   libSystem.B.dylib                   0x00007fff884fa8b6 _pthread_start + 331
//  9   libSystem.B.dylib                   0x00007fff884fa769 thread_start + 13
// Mon Sep 20 19:08:35 [conn7]  Caught Assertion in update , continuing

// Run a non-geo $inc
db.points.update({}, {'$inc' : { 'test' : 1}}, false, true);  

// No error

// Re-run geo $inc
db.points.update({"loc" : {"$within" :  {"$center" : [[5,5], 2]}}}, {'$inc' : { 'test' : 1}}, false, true);

// No error