From 2597bde4f9df5409371da55beabb0f695b853aa3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Thu, 27 Oct 2016 13:14:51 +0200
Subject: [PATCH] GH-1665 diagnostic build - check if log file has been created
 and opened

---
 application/MultiMC.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/application/MultiMC.cpp b/application/MultiMC.cpp
index a226f3b7..0911fcc2 100644
--- a/application/MultiMC.cpp
+++ b/application/MultiMC.cpp
@@ -429,8 +429,11 @@ void appDebugOutput(QtMsgType type, const QMessageLogContext &context, const QSt
 
 	QString out = format.arg(buf).arg(levels[type]).arg(msg);
 
-	MMC->logFile->write(out.toUtf8());
-	MMC->logFile->flush();
+	if(MMC->logFile && MMC->logFile->isOpen())
+	{
+		MMC->logFile->write(out.toUtf8());
+		MMC->logFile->flush();
+	}
 	QTextStream(stderr) << out.toLocal8Bit();
 	fflush(stderr);
 }
@@ -448,6 +451,11 @@ void MultiMC::initLogger()
 
 	logFile = std::make_shared<QFile>(logBase.arg(0));
 	logFile->open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate);
+	if(!logFile || !logFile->isOpen())
+	{
+		QTextStream(stderr) << "Couldn't open log file for writing: " << logBase.arg(0).toLocal8Bit();
+		fflush(stderr);
+	}
 }
 
 void MultiMC::initGlobalSettings(bool test_mode)