[SERVER-8433] Aggregating deeply-nested documents can cause stack overflow - MongoDB Jira

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Recursive calls made to mongo::Document::toBson, in mongo/db/pipeline/document.cpp.

To reproduce (on my OS X 10.8 machine, triggers if levels >= 811):

function makeNestObj(depth){

    toret = {s : 1};

    for(i = 1; i < depth; i++){

        toret = {s : toret};

    return toret;

db.foo.insert(makeNestObj(levels));

db.foo.aggregate({$project:{s:1}})

(snippet above borrowed from ~~SERVER-6462~~)

is duplicated by

SERVER-13878 Issue with aggregation pipeline

related to

SERVER-15559 Fatal Exception: Deeply nested $cond drops mongod process

SERVER-6462 stack overflow when comparing deeply nested bson objects

Participants:: Duraid Madina, Githook User, J Rassi, Kyle Suarez, Tad Marshall