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In MongoDB 3.2, this will appear as
SpiderMonkey brings with it increased support for features defined in the 6th edition of ECMAScript, abbreviated as ES6. ES6 adds many new language features, including:
undefined values intact if saved into a collection.
mongo shell would convert
undefined values into
MongoDB 3.2 also adds the
mongo shell has a corresponding
SpiderMonkey does not allow the non-standard
function that prior versions of MongoDB supported. If you must record stack
traces, you can capture the
Error().stack property as a workaround.