[gstreamer] audio io crashes with FEATURE_alsa

                                                                                                     
                                                                                                     
1  gst_device_create_element                           gstdevice.c               207  0x7fffe87a9e54 
2  QGstElement::createFromDevice                       qgst.cpp                  855  0x7fffe8b798f5 
3  QGstElement::createFromDevice                       qgst.cpp                  850  0x7fffe8b7992e 
4  QGstreamerAudioOutput::setAudioDevice               qgstreameraudiooutput.cpp 89   0x7fffe8b803d1 
5  QAudioOutput::QAudioOutput                          qaudiooutput.cpp          66   0x7ffff00f395b 
6  QAudioOutput::QAudioOutput                          qaudiooutput.cpp          55   0x7ffff00f3a5c 
7  QQmlPrivate::QQmlElement<QAudioOutput>::QQmlElement qqmlprivate.h             99   0x7ffff1e37737 
8  QQmlPrivate::createInto<QAudioOutput>               qqmlprivate.h             174  0x7ffff1e37737 
9  QQmlType::create                                    qqmltype.cpp              506  0x7ffff7a128f2 
10 QQmlType::createWithQQmlData                        qqmltype.cpp              521  0x7ffff7a1299d 
11 QQmlObjectCreator::createInstance                   qqmlobjectcreator.cpp     1301 0x7ffff7a13171 
12 QQmlObjectCreator::setPropertyBinding               qqmlobjectcreator.cpp     884  0x7ffff7a1461e 
13 QQmlObjectCreator::setupBindings                    qqmlobjectcreator.cpp     824  0x7ffff7a16788 
14 QQmlObjectCreator::populateInstance                 qflags.h                  74   0x7ffff7a17989 
15 QQmlObjectCreator::createInstance                   qqmlobjectcreator.cpp     1461 0x7ffff7a137d1 
16 QQmlObjectCreator::setPropertyBinding               qqmlobjectcreator.cpp     884  0x7ffff7a1461e 
17 QQmlObjectCreator::setupBindings                    qqmlobjectcreator.cpp     824  0x7ffff7a16788 
18 QQmlObjectCreator::populateInstance                 qflags.h                  74   0x7ffff7a17989 
19 QQmlObjectCreator::createInstance                   qqmlobjectcreator.cpp     1461 0x7ffff7a137d1 
20 QQmlObjectCreator::create                           qqmlobjectcreator.cpp     201  0x7ffff7a13cf9 
21 QQmlComponentPrivate::beginCreate                   qqmlcomponent.cpp         1089 0x7ffff7aabb63 
22 QQmlComponent::beginCreate                          qqmlcomponent.cpp         1017 0x7ffff7aabdc0 
23 QQmlComponentPrivate::doBeginCreate                 qqmlcomponent.cpp         339  0x7ffff7a8343d 
24 QQmlComponentPrivate::createWithProperties          qqmlcomponent.cpp         945  0x7ffff7aa41c5 
25 QQmlComponent::create                               qqmlcomponent.cpp         912  0x7ffff7aa4468 
26 QQmlApplicationEnginePrivate::finishLoad            qqmlapplicationengine.cpp 156  0x7ffff7aa8986 
27 QQmlApplicationEnginePrivate::ensureLoadingFinishes qqmlapplicationengine.cpp 183  0x7ffff7aa8bc8 
28 QQmlApplicationEnginePrivate::startLoad             qqmlapplicationengine.cpp 142  0x7ffff7ab8262 
29 QQmlApplicationEngine::loadFromModule               qqmlapplicationengine.cpp 388  0x7ffff7ab84b9 
30 main                                                main.cpp                  35   0x55555555927f