From b151e94dea8c582fd3d14021de34511a91cee088 Mon Sep 17 00:00:00 2001
From: Christian Kandeler <christian.kandeler@qt.io>
Date: Fri, 10 Mar 2017 14:08:42 +0100
Subject: [PATCH] QbsProjectManager: Fix soft asserts

Change-Id: I4efef985bc8bd2652a5ea4d6b54a5d4ee8d4941f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
---
 src/plugins/qbsprojectmanager/qbsnodetreebuilder.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/plugins/qbsprojectmanager/qbsnodetreebuilder.cpp b/src/plugins/qbsprojectmanager/qbsnodetreebuilder.cpp
index 6569c4f1150..2fcf090e28f 100644
--- a/src/plugins/qbsprojectmanager/qbsnodetreebuilder.cpp
+++ b/src/plugins/qbsprojectmanager/qbsnodetreebuilder.cpp
@@ -170,7 +170,9 @@ QSet<QString> referencedBuildSystemFiles(const qbs::ProjectData &data)
 
 QStringList unreferencedBuildSystemFiles(const qbs::Project &p)
 {
-    return p.buildSystemFiles().subtract(referencedBuildSystemFiles(p.projectData())).toList();
+    return p.isValid()
+            ? p.buildSystemFiles().subtract(referencedBuildSystemFiles(p.projectData())).toList()
+            : QStringList();
 }
 
 } // namespace