hello,i meet a bug when unoin polygons
ploygona = [[[116.46277925748878,39.88599],[116.46327,39.88599],[116.46327121548828,39.886109220211566],[116.46431140000675,39.88610711457489],[116.46437815770724,39.88610553470714],[116.46437821516655,39.88610675825216],[116.46437798719191,39.886019937380794],[116.46449012423405,39.88601728357566],[116.465193,39.886019],[116.46520508527627,39.886019012615826],[116.465205,39.886002],[116.46584660810673,39.886000300375876],[116.46595733806026,39.88599648210394],[116.46595682983767,39.88595148862629],[116.466,39.88595],[116.46663,39.88595],[116.4671,39.88594],[116.46709942832697,39.88589866765154],[116.467261,39.885898],[116.46726128624843,39.88594],[116.4679,39.88594],[116.46805881008105,39.88595684350834],[116.468043,39.886048],[116.46815974241039,39.886054984588654],[116.46815777083641,39.88607577565319],[116.46815788779723,39.886075783508765],[116.46815384274812,39.88611558570732],[116.468129,39.886114],[116.46792,39.886295],[116.467879,39.88629483526067],[116.467879,39.886422],[116.467864,39.886578],[116.46784403501898,39.88657731712968],[116.467839,39.886627],[116.4678267404138,39.886723675594055],[116.46778,39.88672],[116.4677801555936,39.886717277112126],[116.46764,39.886712],[116.467014,39.886706],[116.46692,39.886765],[116.466925,39.887255],[116.467228,39.887255],[116.467557,39.887252],[116.46770983916338,39.88726160836621],[116.46769,39.88746],[116.46768690541188,39.88767971575692],[116.46771,39.88768],[116.467711,39.887696],[116.46770801472468,39.88823533974078],[116.46767156440872,39.88823507456137],[116.46761,39.88871],[116.46761,39.88878],[116.46761473983558,39.88888860676638],[116.46760846016662,39.88888874291529],[116.46749545690462,39.88887846989132],[116.46749783782663,39.88886234889874],[116.467406,39.888854],[116.46562163217507,39.888857145646234],[116.46513720883907,39.888850509710124],[116.46513646130968,39.88889586425838],[116.465099,39.891529],[116.46509902876262,39.89152985233281],[116.46509382233967,39.89164750296356],[116.46505847429681,39.89164644112512],[116.46505,39.89166],[116.46504218543848,39.89218357562194],[116.46439781209806,39.892186892859215],[116.46437700037785,39.8921867880231],[116.46437799934012,39.891626370191105],[116.46433003220054,39.89162612856142],[116.46432913903807,39.89154727507503],[116.46418,39.89154],[116.46402,39.89153],[116.46402131828314,39.891488080779375],[116.463751,39.891482],[116.46374671152233,39.891513895753334],[116.4635903,39.8915009],[116.46338,39.89145],[116.4632133,39.8913735],[116.4630362,39.8912531],[116.46301444387001,39.89121807797685],[116.46296532973061,39.891141337364424],[116.4629665,39.8911409],[116.4629477,39.8910689],[116.462941,39.8909845],[116.4629343,39.8908868],[116.4629263,39.8907324],[116.4629142,39.8903707],[116.4629082,39.8900314],[116.4629076,39.8899751],[116.4629047,39.8897277],[116.4629065,39.8896535],[116.4629060377541,39.889344521631685],[116.46289971817896,39.88934449737274],[116.46290084273836,39.889185559645384],[116.4629017869734,39.889185567331936],[116.46290295416163,39.88902060283474],[116.4629,39.88885],[116.4629,39.88877],[116.46289532422891,39.88857001059088],[116.462902,39.887829],[116.46290193254518,39.88782389379261],[116.4628762206468,39.887823976702784],[116.46287400232684,39.88782366764997],[116.46287476934253,39.8877141122413],[116.46287,39.88752],[116.46287,39.88711],[116.4628600101224,39.88647064783323],[116.46278,39.88647],[116.46278,39.8861],[116.46277925748878,39.88599]]]
polygonb = [[[116.458553,39.88791],[116.45857094384326,39.88790553563427],[116.45856,39.88788],[116.4585554,39.887848],[116.45856448239947,39.88781221907734],[116.4587112,39.8878347],[116.4591606,39.8878296],[116.45952,39.8878296],[116.45987912842851,39.887820731401185],[116.4598813171811,39.88786572522166],[116.46016837242065,39.88786341614056],[116.4601663,39.8877617],[116.4602998,39.8877604],[116.46066780447438,39.887752718692184],[116.4606703,39.8878119],[116.4606736,39.8878444],[116.46067457705385,39.88785934421506],[116.460966,39.887857],[116.4610304829428,39.88785653927355],[116.4610285,39.8877514],[116.46124888556602,39.88774876594252],[116.46143624152896,39.8877471103319],[116.46144,39.88792],[116.46144,39.88813],[116.46162616602014,39.88812731264462],[116.46162644189089,39.88813614050829],[116.461844,39.888133],[116.462701,39.888107],[116.46288437670745,39.88810507620295],[116.46289951156183,39.88810521663731],[116.46289532422891,39.88857001059088],[116.4629,39.88877],[116.46290002476694,39.88885143029087],[116.46290295416163,39.88902060283474],[116.4629017869734,39.889185567331936],[116.46290084263367,39.889185576001445],[116.46289971814569,39.889344502074465],[116.46273834940025,39.88934400268843],[116.462497,39.889345],[116.46248448325267,39.889345124362634],[116.46248426575583,39.88936692289501],[116.46248073326008,39.88936695799271],[116.461774,39.88936],[116.46176887366315,39.88925767831632],[116.46165,39.88926071363079],[116.46147137010163,39.88926000543263],[116.46147137010163,39.889328505081636],[116.46128,39.88933],[116.46128,39.88938087151887],[116.46106,39.88938000041751],[116.46106,39.889386707395175],[116.46104787153232,39.88938665937188],[116.46104741421834,39.88938050047763],[116.4609066,39.8893861],[116.46081,39.88939],[116.46075,39.88939],[116.46051,39.8894],[116.4604,39.8894],[116.46001,39.88941],[116.45977,39.88942],[116.45964,39.88943],[116.4593013,39.8894392],[116.45863305962509,39.889449950776175],[116.45863182188327,39.889413562334404],[116.45864,39.88925],[116.45864,39.88919],[116.45867,39.88908],[116.45870000018292,39.88904999987805],[116.45873,39.88903],[116.45879557236869,39.88896442771095],[116.458585,39.888791],[116.45861712636355,39.88853572565184],[116.45862172063282,39.88849707042791],[116.45859959426923,39.88849534476924],[116.45861503309332,39.88836544569761],[116.4586208207688,39.88828984423715],[116.45862073675784,39.88828973863373],[116.4586294031725,39.88817653337766],[116.458631,39.888143],[116.458617,39.888064],[116.458553,39.88791]]]
log is :union error: Unable to complete output ring starting at [116.458553, 39.887910].
Last matching segment found ends at [116.462908, 39.889975].
hello,i meet a bug when unoin polygons
ploygona = [[[116.46277925748878,39.88599],[116.46327,39.88599],[116.46327121548828,39.886109220211566],[116.46431140000675,39.88610711457489],[116.46437815770724,39.88610553470714],[116.46437821516655,39.88610675825216],[116.46437798719191,39.886019937380794],[116.46449012423405,39.88601728357566],[116.465193,39.886019],[116.46520508527627,39.886019012615826],[116.465205,39.886002],[116.46584660810673,39.886000300375876],[116.46595733806026,39.88599648210394],[116.46595682983767,39.88595148862629],[116.466,39.88595],[116.46663,39.88595],[116.4671,39.88594],[116.46709942832697,39.88589866765154],[116.467261,39.885898],[116.46726128624843,39.88594],[116.4679,39.88594],[116.46805881008105,39.88595684350834],[116.468043,39.886048],[116.46815974241039,39.886054984588654],[116.46815777083641,39.88607577565319],[116.46815788779723,39.886075783508765],[116.46815384274812,39.88611558570732],[116.468129,39.886114],[116.46792,39.886295],[116.467879,39.88629483526067],[116.467879,39.886422],[116.467864,39.886578],[116.46784403501898,39.88657731712968],[116.467839,39.886627],[116.4678267404138,39.886723675594055],[116.46778,39.88672],[116.4677801555936,39.886717277112126],[116.46764,39.886712],[116.467014,39.886706],[116.46692,39.886765],[116.466925,39.887255],[116.467228,39.887255],[116.467557,39.887252],[116.46770983916338,39.88726160836621],[116.46769,39.88746],[116.46768690541188,39.88767971575692],[116.46771,39.88768],[116.467711,39.887696],[116.46770801472468,39.88823533974078],[116.46767156440872,39.88823507456137],[116.46761,39.88871],[116.46761,39.88878],[116.46761473983558,39.88888860676638],[116.46760846016662,39.88888874291529],[116.46749545690462,39.88887846989132],[116.46749783782663,39.88886234889874],[116.467406,39.888854],[116.46562163217507,39.888857145646234],[116.46513720883907,39.888850509710124],[116.46513646130968,39.88889586425838],[116.465099,39.891529],[116.46509902876262,39.89152985233281],[116.46509382233967,39.89164750296356],[116.46505847429681,39.89164644112512],[116.46505,39.89166],[116.46504218543848,39.89218357562194],[116.46439781209806,39.892186892859215],[116.46437700037785,39.8921867880231],[116.46437799934012,39.891626370191105],[116.46433003220054,39.89162612856142],[116.46432913903807,39.89154727507503],[116.46418,39.89154],[116.46402,39.89153],[116.46402131828314,39.891488080779375],[116.463751,39.891482],[116.46374671152233,39.891513895753334],[116.4635903,39.8915009],[116.46338,39.89145],[116.4632133,39.8913735],[116.4630362,39.8912531],[116.46301444387001,39.89121807797685],[116.46296532973061,39.891141337364424],[116.4629665,39.8911409],[116.4629477,39.8910689],[116.462941,39.8909845],[116.4629343,39.8908868],[116.4629263,39.8907324],[116.4629142,39.8903707],[116.4629082,39.8900314],[116.4629076,39.8899751],[116.4629047,39.8897277],[116.4629065,39.8896535],[116.4629060377541,39.889344521631685],[116.46289971817896,39.88934449737274],[116.46290084273836,39.889185559645384],[116.4629017869734,39.889185567331936],[116.46290295416163,39.88902060283474],[116.4629,39.88885],[116.4629,39.88877],[116.46289532422891,39.88857001059088],[116.462902,39.887829],[116.46290193254518,39.88782389379261],[116.4628762206468,39.887823976702784],[116.46287400232684,39.88782366764997],[116.46287476934253,39.8877141122413],[116.46287,39.88752],[116.46287,39.88711],[116.4628600101224,39.88647064783323],[116.46278,39.88647],[116.46278,39.8861],[116.46277925748878,39.88599]]]
polygonb = [[[116.458553,39.88791],[116.45857094384326,39.88790553563427],[116.45856,39.88788],[116.4585554,39.887848],[116.45856448239947,39.88781221907734],[116.4587112,39.8878347],[116.4591606,39.8878296],[116.45952,39.8878296],[116.45987912842851,39.887820731401185],[116.4598813171811,39.88786572522166],[116.46016837242065,39.88786341614056],[116.4601663,39.8877617],[116.4602998,39.8877604],[116.46066780447438,39.887752718692184],[116.4606703,39.8878119],[116.4606736,39.8878444],[116.46067457705385,39.88785934421506],[116.460966,39.887857],[116.4610304829428,39.88785653927355],[116.4610285,39.8877514],[116.46124888556602,39.88774876594252],[116.46143624152896,39.8877471103319],[116.46144,39.88792],[116.46144,39.88813],[116.46162616602014,39.88812731264462],[116.46162644189089,39.88813614050829],[116.461844,39.888133],[116.462701,39.888107],[116.46288437670745,39.88810507620295],[116.46289951156183,39.88810521663731],[116.46289532422891,39.88857001059088],[116.4629,39.88877],[116.46290002476694,39.88885143029087],[116.46290295416163,39.88902060283474],[116.4629017869734,39.889185567331936],[116.46290084263367,39.889185576001445],[116.46289971814569,39.889344502074465],[116.46273834940025,39.88934400268843],[116.462497,39.889345],[116.46248448325267,39.889345124362634],[116.46248426575583,39.88936692289501],[116.46248073326008,39.88936695799271],[116.461774,39.88936],[116.46176887366315,39.88925767831632],[116.46165,39.88926071363079],[116.46147137010163,39.88926000543263],[116.46147137010163,39.889328505081636],[116.46128,39.88933],[116.46128,39.88938087151887],[116.46106,39.88938000041751],[116.46106,39.889386707395175],[116.46104787153232,39.88938665937188],[116.46104741421834,39.88938050047763],[116.4609066,39.8893861],[116.46081,39.88939],[116.46075,39.88939],[116.46051,39.8894],[116.4604,39.8894],[116.46001,39.88941],[116.45977,39.88942],[116.45964,39.88943],[116.4593013,39.8894392],[116.45863305962509,39.889449950776175],[116.45863182188327,39.889413562334404],[116.45864,39.88925],[116.45864,39.88919],[116.45867,39.88908],[116.45870000018292,39.88904999987805],[116.45873,39.88903],[116.45879557236869,39.88896442771095],[116.458585,39.888791],[116.45861712636355,39.88853572565184],[116.45862172063282,39.88849707042791],[116.45859959426923,39.88849534476924],[116.45861503309332,39.88836544569761],[116.4586208207688,39.88828984423715],[116.45862073675784,39.88828973863373],[116.4586294031725,39.88817653337766],[116.458631,39.888143],[116.458617,39.888064],[116.458553,39.88791]]]
log is :union error: Unable to complete output ring starting at [116.458553, 39.887910].
Last matching segment found ends at [116.462908, 39.889975].