openlayers 3 - feature convert to geoJSON string failed -


i got geometry featureoverlay,and create feature geometry, when setid , setgeometryname feature ,i failed writefeature , bug ?

var poly = featureoverlay.getfeatures().item(0);         if (poly != null) {              var feature = new ol.feature({                 geometry: poly             });             feature.setid('bd355df3fd916d30');             feature.setgeometryname('test');             var extent = [0, 0, 749, 638];             var projection = new ol.proj.projection({                 code: 'xkcd-image',                 units: 'pixels',                 extent: extent             });             var geojson = new ol.format.geojson({                 defaultdataprojection: projection             });             //this success             var geojsontext = geojson.writefeature(poly, {                 featureprojection: projection,                 dataprojection: projection             });            //this failed            var geojsontext = geojson.writefeature(feature, {                 featureprojection: projection,                 dataprojection: projection            });         }    uncaught typeerror: converting circular structure json l.qd @ openlayers?v=ygwtoeagf-vdycn0ewoqeiy8jyarvcdftraysewzwri1:501 stopinteraction @ testedit?id=8b0d3745a6c1b46b:447 onclick @ testedit?id=8b0d3745a6c1b46b:230

it's problem.

feature.setid('bd355df3fd916d30'); feature.setgeometryname('test');

modified fixed :

feature.setid('bd355df3fd916d30'); feature.setproperties(['test']);

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