From ac8172e820d15d36c0b68d71cdd7885138f981d7 Mon Sep 17 00:00:00 2001
From: Wykks <wykksoss@gmail.com>
Date: Fri, 17 Nov 2017 22:54:16 +0100
Subject: [PATCH] fix(geojsonSource): protect onDestroy

fix #6
---
 src/app/lib/source/geojson/geojson-source.component.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/app/lib/source/geojson/geojson-source.component.ts b/src/app/lib/source/geojson/geojson-source.component.ts
index e15847b08..afb4c8b7e 100644
--- a/src/app/lib/source/geojson/geojson-source.component.ts
+++ b/src/app/lib/source/geojson/geojson-source.component.ts
@@ -82,8 +82,10 @@ export class GeoJSONSourceComponent implements OnInit, OnDestroy, OnChanges, Geo
   }
 
   ngOnDestroy() {
-    this.sub.unsubscribe();
-    this.MapService.removeSource(this.id);
+    if (this.sourceAdded) {
+      this.sub.unsubscribe();
+      this.MapService.removeSource(this.id);
+    }
   }
 
   addFeature(feature: GeoJSON.Feature<GeoJSON.GeometryObject>) {