testWizard and testShellWithPin crashes on yakkety-proposed with Qt 5.6.1

In yakkety-proposed two tests are crashing reliably:

testWizard
testShellWithPin

The trace for both is quite similar:

[testWizard]
#0 0x00007ffff3b159b4 in QQuickItem::window (this=0x555556249c40) at items/qquickitem.cpp:2837
No locals.
#1 0x00007fffddeb58db in TouchEventSequenceWrapper::commit (this=0x5555557623d0, processEvents=true)
    at /home/ubuntu/dev/canonical/unity8/repo/tests/utils/modules/Unity/Test/TouchEventSequenceWrapper.cpp:30
No locals.
#2 0x00007fffddeb9e8b in TouchEventSequenceWrapper::qt_static_metacall (_o=0x5555557623d0,
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffff6f20)
    at /home/ubuntu/dev/canonical/unity8/repo/builddir/tests/utils/modules/Unity/Test/moc_TouchEventSequenceWrapper.cpp:90
        _t = 0x5555557623d0
#3 0x00007fffddeba046 in TouchEventSequenceWrapper::qt_metacall (this=0x5555557623d0,
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffff6f20)
    at /home/ubuntu/dev/canonical/unity8/repo/builddir/tests/utils/modules/Unity/Test/moc_TouchEventSequenceWrapper.cpp:126
No locals.
[...]

http://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/quick/items/qquickitem.cpp?h=5.6.1#n2834

[testShellWithPin]
#0 QQuickWindowPrivate::flushDelayedTouchEvent (this=0x38000055555586ff) at items/qquickwindow.cpp:1964
No locals.
#1 0x00007fffdd15790d in TouchEventSequenceWrapper::commit (this=0x5555570f9310, processEvents=true) at /home/ubuntu/dev/canonical/unity8/repo/tests/utils/modules/Unity/Test/TouchEventSequenceWrapper.cpp:32
        wp = 0x38000055555586ff
#2 0x00007fffdd15be8b in TouchEventSequenceWrapper::qt_static_metacall (_o=0x5555570f9310, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffff7040)
    at /home/ubuntu/dev/canonical/unity8/repo/builddir/tests/utils/modules/Unity/Test/moc_TouchEventSequenceWrapper.cpp:90
        _t = 0x5555570f9310
#3 0x00007fffdd15c046 in TouchEventSequenceWrapper::qt_metacall (this=0x5555570f9310, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffff7040)
    at /home/ubuntu/dev/canonical/unity8/repo/builddir/tests/utils/modules/Unity/Test/moc_TouchEventSequenceWrapper.cpp:126
No locals.
[...]

http://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/quick/items/qquickwindow.cpp?h=5.6.1#n1962

Looks to me like Qt-internal issue potentially.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: unity8 (not installed)
ProcVersionSignature: User Name 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.3-0ubuntu1
Architecture: amd64
Date: Fri Jul 29 08:21:31 2016
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)