From fa9e0e2cbbcb0733e86a47f489296f58fbcf34af Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Sun, 20 May 2018 13:28:02 +0200
Subject: Assert that we have a QGuiApplication if we crash otherwise.

---
 common/mailpreprocessor.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/mailpreprocessor.cpp b/common/mailpreprocessor.cpp
index 9efa5c9..7bc80cd 100644
--- a/common/mailpreprocessor.cpp
+++ b/common/mailpreprocessor.cpp
@@ -22,6 +22,7 @@
 #include <QFile>
 #include <QDir>
 #include <QTextDocument>
+#include <QGuiApplication>
 #include <KMime/KMime/KMimeMessage>
 
 #include "pipeline.h"
@@ -57,6 +58,9 @@ static QList<QPair<QString, QString>> processPart(KMime::Content* content)
             }
             return list;
         } else if (type->isHTMLText()) {
+            //QTextDocument has an implicit runtime dependency on QGuiApplication via the color palette.
+            //If the QGuiApplication is not available we will crash (if the html contains colors).
+            Q_ASSERT(QGuiApplication::instance());
             // Only get HTML content, if no plain text content
             QTextDocument doc;
             doc.setHtml(content->decodedText());
-- 
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