problem with mongodb

[TrejGun]

I have a problem with code which is passed directly to mongo how ever I believe this can be a case with phantomjs and other libs too

here is an doc for mapReduce https://docs.mongodb.com/manual/core/map-reduce/

so the code in the project looks like

Model.mapReduce({
    _id: myId,
    map: function(){
        emit(model.prop, model.value);
    },
    reduce: function(key, values){
        return Array.sum(values);
    }
})

and causing an error

MongoError: ReferenceError: __cov_ddStlu$azUVg91hD_AsL3iLcer8 is not defined :
    map@:1:26
at Function.MongoError.create (node_modules/mongodb-core/lib/error.js:31:11)
at commandCallback (node_modules/mongodb-core/lib/topologies/server.js:1187:66)
at Callbacks.emit (node_modules/mongodb-core/lib/topologies/server.js:119:3)
at .messageHandler (node_modules/mongodb-core/lib/topologies/server.js:358:23)
at Socket.<anonymous> (node_modules/mongodb-core/lib/connection/connection.js:292:22)
at readableAddChunk (_stream_readable.js:177:18)
at Socket.Readable.push (_stream_readable.js:135:10)
at TCP.onread (net.js:542:20)
From previous event:
    at Function.mapReduce (node_modules/mongoose/lib/model.js:2132:10)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickDomainCallback (internal/process/next_tick.js:122:9)
From previous event:
    at Model.mapReduce (abstract.js:19:3)
at TransactionController.AbstractController.(anonymous function) [as mapReduce] (source/controllers/abstract/abstract.js:3:537)
at bookingController.distinct.then.transactionIds (source/controllers/operator/event.js:4:4741)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickDomainCallback (internal/process/next_tick.js:122:9)

not sure what is the best way to fix this may be its possible to add some tags to exclude such code

[TrejGun]

as project is dead i'm closing this

[davglass]

This code base has been replaced, the latest source is hosted here: https://github.com/istanbuljs