From d5d9e5c557d2dce972383513a9352f0cd39f988d Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@kbt.io>
Date: Thu, 21 Oct 2021 12:46:36 +0200
Subject: [PATCH] Have QgsRectangle::snappedToGrid return a copy of self for
 Null rects

---
 src/core/geometry/qgsrectangle.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/geometry/qgsrectangle.cpp b/src/core/geometry/qgsrectangle.cpp
index cb6a0e39640b..1e2b5eb7f2bc 100644
--- a/src/core/geometry/qgsrectangle.cpp
+++ b/src/core/geometry/qgsrectangle.cpp
@@ -192,6 +192,8 @@ QgsBox3D QgsRectangle::toBox3d( double zMin, double zMax ) const
 
 QgsRectangle QgsRectangle::snappedToGrid( double spacing ) const
 {
+  if ( isNull() ) return *this;
+
   // helper function
   auto gridifyValue = []( double value, double spacing ) -> double
   {