Apps Crashed（ios）

[Jasonho95]

{
"runningMs": 31161,
"type": "error",
"msg": "TypeError: undefined is not an object (evaluating 'this._positions[0]'): undefined is not an object (evaluating 'this._positions[0]')",
"line": 3,
"col": 28665,
"url": "http://localhost:8080/var/containers/Bundle/Application/FA034300-E2FC-405D-AE12-BADCC48FDC68/Windy.app/www/index.html#/?2018-09-09-00,22.291,114.150,5",
"script": "leaflet077_patched_tileLayer.v11.js",
"ver": "15.16.4",
"target": "mobile",
"stack": "_onDragEnd@http://localhost:8080/var/containers/Bundle/Application/FA034300-E2FC-405D-AE12-BADCC48FDC68/Windy.app/www/js/leaflet077_patched_tileLayer.v11.js:3:28665
fireEvent@http://localhost:8080/var/containers/Bundle/Application/FA034300-E2FC-405D-AE12-BADCC48FDC68/Windy.app/www/js/leaflet077_patched_tileLayer.v11.js:1:5054
_onUp@http://localhost:8080/var/containers/Bundle/Application/FA034300-E2FC-405D-AE12-BADCC48FDC68/Windy.app/www/js/leaflet077_patched_tileLayer.v11.js:3:26651
f@http://localhost:8080/var/containers/Bundle/Application/FA034300-E2FC-405D-AE12-BADCC48FDC68/Windy.app/www/js/leaflet077_patched_tileLayer.v11.js:3:21164",
"scriptLine": "leaflet077-3",
"latestBcast": "bcast: log user-logged-in (28020ms. ago)
bcast: pluginOpened pois (27983ms. ago)
bcast: pluginOpened user (27967ms. ago)
store: hpShown (395ms. ago)
bcast: movestart (363ms. ago)
",
"sessionName": "hk-central-district-64",
"sessionCounter": 19,
"lang": "zh-TW",
"retina": true,
"size": "768x1024",
"glParticles": false,
"platform": "ios",
"errorID": "typeerror-undefined-is-not-an-object-evaluating-this-pos"
}