An error occurred when starting a widget embedded within InfoWindow: Cannot read property '1' of null

Question

I am getting the above error (init.js:919 API v3.14) identifying a feature in a javascript map viewer, when calling `infoWindow.setFeatures(featureSet);`. The problem is caused by a map service having field aliases with trailing colons in them. The following is part of the json returned from the map service query (geometry removed). I can see the problem, but not sure how to go about fixing it? Is it caused by the json deserialization, serialization by the REST API (10.3.1 server), or a bug in the javascript API? If I only choose outfields that have no trailing colon, it works. I have no control over the offending map service. {
"results":[{
"layerId":37,
"layerName":"Waste Water Lateral",
"displayFieldName":"Unit ID:",
"value":"NP-MANGO0131SL/1",
"attributes":{
"OBJECTID":"2474425",
"Depth":"0.6",
"SHAPE":"Polyline",
"Install":"Null",
"Unit ID:":"NP-MANGO0131SL/1",
"Owner:":"W&W",
"Asset ID:":"115807",
"Comments:":"Null",
"NPDC_VECTOR_SDEADMIN_SVEW_WWLATERAL_area":"NP",
"SHAPE_Length":"8.117518"
},
"geometryType":"esriGeometryPolyline" // geometry removed
}
}]

TrevorMasters · Answer

Sorry, It is my copy/paste that is incorrect - I tried to simplify the example by removing lines, and adding newlines. The key thing is the trailing colon (:) in any field name. The response Json looks correct (e.g. "Comments:":"Null") but this gets interpreted as "Comments"::"Null".

FrankJohnson · Answer

Im not sure if your JSON code is bad or you pasted part of the code you have. Your closing bracket is in the wrong position.

//geometry removed

} ]

}  -- This is closing the top of the code.. you have it inside the results declaration. Move it and see if you still get the error.