Multiple memory leaks in Qt 5.6.0

I've ran some of the qt tests through a dynamic analyzer (Pareon Verify), and found several memory leaks. The line numbers below correspond to the source release of Qt 5.6.0.

Class members allocated in constructors and never freed:

a. QTabletEvent::mExtra
Allocated in: qevent.cpp:2324
Auto test: tst_qwindow

b. QScrollerPrivate::scrollTimer
Allocated in: qscroller.cpp:889
Auto test: tst_qscroller

c. QGLBufferPrivate::funcs
Allocated in: qglbuffer.cpp:282
Auto test: tst_qglbuffer

d. QGraphicsGridLayoutPrivate::styleInfo
Allocated in: qgraphicsgridlayout.cpp:110
Auto test: tst_qgraphicsgridlayout

Duplicate of QTBUG-41322.

EDIT: Removed leaks in test code.