From 225b07970d7a335085fa28316863a63584be595b Mon Sep 17 00:00:00 2001
From: Pieter Vander Vennet <pietervdvn@posteo.net>
Date: Sun, 16 Feb 2025 02:40:26 +0100
Subject: [PATCH] Fix: attempt to fix #2312

---
 src/UI/Map/ShowDataLayer.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/UI/Map/ShowDataLayer.ts b/src/UI/Map/ShowDataLayer.ts
index 15aa40d70f..710891da7a 100644
--- a/src/UI/Map/ShowDataLayer.ts
+++ b/src/UI/Map/ShowDataLayer.ts
@@ -352,6 +352,11 @@ class LineRenderingLayer {
         // After waiting 'till the map has loaded, the data might have changed already
         // As such, we only now read the features from the featureSource and compare with the previously set data
         const features = featureSource.data
+        if (features.length === 0) {
+            // This is a very ugly workaround for https://source.mapcomplete.org/MapComplete/MapComplete/issues/2312,
+            // but I couldn't find the root cause
+            return
+        }
         const src = <GeoJSONSource>map.getSource(this._layername)
         {
             // Add source to the map or update the feature source