Why does setSubSymbol causes QGIS to crash?

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I am having problems creating a multilayer line symbol with this code :

symbol = QgsLineSymbolV2.createSimple({}) symbol.deleteSymbolLayer(0) symbolLine = QgsSimpleLineSymbolLayerV2() symbol.appendSymbolLayer(symbolLine) symbolArrow = QgsMarkerSymbolV2.createSimple({}) symbolArrow.deleteSymbolLayer(0) symbolArrowLayer = QgsSimpleMarkerSymbolLayerV2() symbolArrow.appendSymbolLayer(symbolArrowLayer) symbolLineArrow = QgsMarkerLineSymbolLayerV2() symbolLineArrow.setSubSymbol(symbolArrow) # Causes crash !!! symbol.appendSymbolLayer(symbolLineArrow) Is there something wrong in this code ? Has anybody already had this issue ?



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