fix: crash when quit application

Change-Id: I347ddf47230bf7d04f9e3d7e0267a8bf4920a756
linuxdeepin · Mar 13, 2018 · 13d22e3 · 13d22e3
1 parent 7d578e9
commit 13d22e3
Showing 1 changed file with 9 additions and 3 deletions.
diff --git a/src/widgets/dapplication.cpp b/src/widgets/dapplication.cpp
@@ -150,16 +150,22 @@ bool DApplicationPrivate::setSingleInstanceBySemaphore(const QString &key)
     singleInstance = tryAcquireSystemSemaphore(&ss);
 
     if (singleInstance) {
-        QtConcurrent::run([] {
+        QtConcurrent::run([this] {
+            QPointer<DApplication> that = q_func();
+
             while (ss.acquire() && singleInstance)
             {
-                if (qApp->startingUp() || qApp->closingDown()) {
+                if (!that)
+                    return;
+
+                if (that->startingUp() || that->closingDown()) {
                     break;
                 }
 
                 ss.release(1);
 
-                Q_EMIT qApp->newInstanceStarted();
+                if (that)
+                    Q_EMIT that->newInstanceStarted();
             }
         });