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Currently cellFoldValues_F has a check that the data to be processed is made of all boolean values. However, the scalar counterpart, traverseF, can return non boolean values (e.g. when it is applied to a non-array value and the lambda returns non-boolean, i.e. Nothing) or handle non boolean values coming from the lambda (that are treated as "false") e.g. coll.aggregate([ { $match: { "time": { $in: [[new Date("2019-09-27T21:14:45.654Z")]] } } }, { $group: { _id: null } }] )

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xgen-internal-githook commented on Tue, 30 Jan 2024 10:29:04 +0000: Author: {'name': 'Alberto Massari', 'email': 'alberto.massari@mongodb.com', 'username': 'albymassari'} Message: SERVER-85800 cellFoldValues_F treats non-boolean input values as False (#18459) GitOrigin-RevId: f1fef74851451d8bb51eff1b033786fe63b37230 Branch: master https://github.com/mongodb/mongo/commit/7963af36a3aa17af324edcb83ecf6320dfaa6f61

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