Defensive Programming

Task-number: QTBUG-21623
Change-Id: Ib906e6b50041d4e72034d6828d4dc7c503ec7bb4
Reviewed-on: http://codereview.qt-project.org/5426
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Martin Jones <martin.jones@nokia.com>

diff --git a/src/declarative/particles/qsgparticlesystem.cpp b/src/declarative/particles/qsgparticlesystem.cpp
index 26c6d05..f886865 100644 (file)
--- a/src/declarative/particles/qsgparticlesystem.cpp
+++ b/src/declarative/particles/qsgparticlesystem.cpp
@@ -938,6 +938,9 @@ void QSGParticleSystem::particleStateChange(int idx)
 
 void QSGParticleSystem::moveGroups(QSGParticleData *d, int newGIdx)
 {
+    if (!d || newGIdx == d->group)
+        return;
+
     QSGParticleData* pd = newDatum(newGIdx, false, d->systemIndex);
     pd->clone(*d);
     finishNewDatum(pd);