Fix re-set map items rendering stale geometry

Geometries are now cleared if data is invalid, before early return.

Task-number: QTBUG-66758
Change-Id: Ie89248f78b5fd817a33ed5d6ff56b3547d64a50b
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/location/declarativemaps/qdeclarativepolylinemapitem.cpp b/src/location/declarativemaps/qdeclarativepolylinemapitem.cpp
index 90ed95e4..3b004dce 100644
--- a/src/location/declarativemaps/qdeclarativepolylinemapitem.cpp
+++ b/src/location/declarativemaps/qdeclarativepolylinemapitem.cpp
@@ -748,9 +748,14 @@ void QDeclarativePolylineMapItem::updateCache()
 */
 void QDeclarativePolylineMapItem::updatePolish()
 {
-    if (!map() || geopath_.path().length() == 0
-            || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator)
+    if (!map() || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator)
+        return;
+    if (geopath_.path().length() == 0) { // Possibly cleared
+        geometry_.clear();
+        setWidth(0);
+        setHeight(0);
         return;
+    }
 
     QScopedValueRollback<bool> rollback(updatingGeometry_);
     updatingGeometry_ = true;