From caf334e65b11f9ee1590f74fe395e97d92bbe699 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Tue, 4 Feb 2020 11:04:58 +1000
Subject: [PATCH] Fix crash when changing raster data source

Fixes #34231
---
 src/app/qgisapp.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index 2aeace21691c..f80993ffb658 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -7716,7 +7716,7 @@ void QgisApp::changeDataSource( QgsMapLayer *layer )
         {
           subsetString = vlayer->dataProvider()->subsetString();
         }
-        if ( subsetString.isEmpty() )
+        if ( vlayer && subsetString.isEmpty() )
         {
           // actually -- the above isn't true in all situations. If a layer was invalid at the time
           // that the subset string was set, then ONLY the layer has knowledge of this subset string!