From 4970c328fa2cb1b7f57168879ef0eb38893ea7fe Mon Sep 17 00:00:00 2001
From: Adriaan de Groot <groot@kde.org>
Date: Mon, 30 Sep 2019 17:55:11 +0200
Subject: [PATCH] [libcalamares] Fix stringification of broken instance keys

---
 src/libcalamares/modulesystem/InstanceKey.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libcalamares/modulesystem/InstanceKey.h b/src/libcalamares/modulesystem/InstanceKey.h
index 35ad27c40..ad0fae0e7 100644
--- a/src/libcalamares/modulesystem/InstanceKey.h
+++ b/src/libcalamares/modulesystem/InstanceKey.h
@@ -90,7 +90,11 @@ public:
 
     QString toString() const
     {
-        return first + '@' + second;
+        if ( isValid() )
+        {
+            return first + '@' + second;
+        }
+        return QString();
     }
 
 private: