QGIS crashes when makeGraph is called.

[qgib]

Author Name: Tommie Jones (Tommie Jones)
Original Redmine Issue: 18170
Affected QGIS version: 2.14.3
Redmine category:c++_plugins

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I have a plugin that runs the following code

        layer = self.iface.activeLayer()
        director = QgsLineVectorLayerDirector( layer, -1, '', '', '', 3 )
        properter = QgsDistanceArcProperter()
        director.addProperter( properter )
        builder = QgsGraphBuilder( layer.crs() )
        tiedPoints  = director.makeGraph( builder, [] )
        #graph = builder.graph()
        #vn = graph.vertexCount()
        #print(u"the graph has"+str(vn)+u" points")

When the function makeGraph is called then the qgis crashes

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

VM Regions Near 0:
--> 
    __TEXT                 000000010b76b000-000000010b98e000 [ 2188K] r-x/rwx SM=COW  /Applications/QGIS.app/Contents/MacOS/QGIS

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.qgis.qgis2_core           	0x000000010d2cadde QgsGeometry::wkbType() const + 4
1   org.qgis.qgis2_networkanalysis	0x000000012096021a QgsLineVectorLayerDirector::makeGraph(QgsGraphBuilderInterface*, QVector<QgsPoint> const&, QVector<QgsPoint>&) const + 656
2   _networkanalysis.so           	0x00000001247734a2 meth_QgsLineVectorLayerDirector_makeGraph(_object*, _object*) + 203
3   org.python.python             	0x0000000121017a0b PyEval_EvalFrameEx + 13400
4   org.python.python             	0x00000001210143c1 PyEval_EvalCodeEx + 1583
5   org.python.python             	0x0000000120fb92e5 0x120f91000 + 164581
6   org.python.python             	0x0000000120f9b202 PyObject_Call + 99
7   org.python.python             	0x0000000120fa5ff5 0x120f91000 + 86005
8   org.python.python             	0x0000000120f9b202 PyObject_Call + 99
9   org.python.python             	0x0000000121019e83 PyEval_CallObjectWithKeywords + 165
10  sip.so                        	0x00000001212add03 sip_api_invoke_slot_ex + 785
11  QtCore.so                     	0x00000001213d124c PyQtProxy::invokeSlot(qpycore_slot const

[qgib]

Author Name: Alexander Bruy (@alexbruy)

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QGIS 2.14 is too old. Please test on latest 2.18 and/or master.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• crashes_corrupts_data was changed from 0 to 1
• priority_id was changed from Normal to High
• status_id was changed from Open to Feedback

[qgib]

Author Name: Alexander Bruy (@alexbruy)

---

Closed for the lack of feedback. Please reopen if necessary.

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• status_id was changed from Feedback to Closed