From d06f2d818817820bbd8d6c1cb2d2b09ea507802f Mon Sep 17 00:00:00 2001
From: Alessandro Pasotti <elpaso@itopen.it>
Date: Mon, 3 Feb 2020 13:39:51 +0100
Subject: [PATCH] Do not insert 0x0 in XML

Fixes #34218
---
 src/core/qgsxmlutils.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/qgsxmlutils.cpp b/src/core/qgsxmlutils.cpp
index db5f1f1a897..a2bed40ef6d 100644
--- a/src/core/qgsxmlutils.cpp
+++ b/src/core/qgsxmlutils.cpp
@@ -161,11 +161,15 @@ QDomElement QgsXmlUtils::writeVariant( const QVariant &value, QDomDocument &doc
     case QVariant::LongLong:
     case QVariant::ULongLong:
     case QVariant::String:
-    case QVariant::Char:
       element.setAttribute( QStringLiteral( "type" ), QVariant::typeToName( value.type() ) );
       element.setAttribute( QStringLiteral( "value" ), value.toString() );
       break;
 
+    case QVariant::Char:
+      element.setAttribute( QStringLiteral( "type" ), QVariant::typeToName( value.type() ) );
+      element.setAttribute( QStringLiteral( "value" ), value.isNull() ? QString() : value.toString() );
+      break;
+
     case QVariant::Color:
       element.setAttribute( QStringLiteral( "type" ), QStringLiteral( "color" ) );
       element.setAttribute( QStringLiteral( "value" ), value.value< QColor >().isValid() ? QgsSymbolLayerUtils::encodeColor( value.value< QColor >() ) : QString() );