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Type: Bug
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Resolution: Done
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Aggregation Framework
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Labels:None
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ALL
It looks like parsing an empty object in Expression::parseObject() produces a null pointer. And ExpressionNary::optimize() does not expect null pointers in vpOperand.
Test:
c = db.c; c.drop(); c.save( {} ); c.aggregate( { $project:{ a:{ $and:[ {} ] } } } );