[PyQt] Deadlock in 5.9.1

[V. Armando Solé]

Hello,

Not tested, but I wonder if it has something to do with the fix that
took place immediately after the official PyQt 5.9 release:

2017-07-10  Phil Thompson  <phil at riverbankcomputing.com>

	* qpy/QtBluetooth/qpybluetooth_qlist.sip, qpy/QtCore/qjsonarray.sip,
	qpy/QtCore/qpycore_qlist.sip, qpy/QtCore/qpycore_qset.sip,
	qpy/QtCore/qpycore_qvector.sip, qpy/QtCore/qstringlist.sip,
	qpy/QtGui/qpygui_qvector.sip,
	qpy/QtMultimedia/qpymultimedia_qlist.sip,
	qpy/QtPrintSupport/qpyprintsupport_qlist.sip,
	qpy/QtWidgets/qpywidgets_qlist.sip:
	Clear the exception whenever PyObject_GetIter() fails when checking
	if an object can be converted.
	[07fc1c2b14a6] <5.9-maint>

	* PyQt5.msp:
	Release the GIL on all QThreadPool methods that access the internal
	mutex.
	[f710d0e81300] <5.9-maint>

2017-07-03  Phil Thompson  <phil at riverbankcomputing.com>

	* .hgtags:
	Added tag 5.9 for changeset 307fa2afedd4
	[d84f568cd92f]

	* NEWS:
	Released as v5.9.
	[307fa2afedd4] [5.9]

Best regards,

Armando