Segfault with onentry: log (SCXML)

#include <QCoreApplication>
#include <QtScxml/QScxmlStateMachine>
#include <QDebug>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QScxmlStateMachine *machine = QScxmlStateMachine::fromFile(QStringLiteral(":/scxml"));
    if (!machine->parseErrors().isEmpty()) {
       const auto errors = machine->parseErrors();
       for (const QScxmlError &error : errors) {
           qDebug() << error.toString();
       }
    }
    else qDebug() << "parsed ok";
    machine->start();
    return a.exec();
}

<?xml version="1.0" encoding="UTF-8"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" binding="early" xmlns:qt="http://www.qt.io/2015/02/scxml-ext" name="SCTest" qt:editorversion="4.2.1">
    <state id="idle">
        <onentry>
            <log/>
        </onentry>
    </state>
</scxml>

Thread 1 (Thread 0x7f88cd9861c0 (LWP 2430)):
#0  0x00007f88cc6b5fd9 in QDebug::putString(QChar const*, unsigned long) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#1  0x00007f88cd5c9add in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#2  0x00007f88cd5c7f00 in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#3  0x00007f88cd5c812b in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#4  0x00007f88cd5c9c55 in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#5  0x00007f88cd5b7102 in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#6  0x00007f88cd5b91e1 in ?? () from /usr/lib/libQt5Scxml.so.5
No symbol table info available.
#7  0x00007f88cc7d1ba9 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#8  0x00007f88cc7a542b in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#9  0x00007f88cc7a7bcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#10 0x00007f88cc7f9c43 in ?? () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#11 0x00007f88c9c445a7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#12 0x00007f88c9c44810 in ?? () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#13 0x00007f88c9c448bc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#14 0x00007f88cc7fa04f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#15 0x00007f88cc7a389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#16 0x00007f88cc7abde4 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
No symbol table info available.
#17 0x0000000000401113 in main (argc=1, argv=0x7ffe14253e98) at ../scxml_test/main.cpp:20
        a = <incomplete type>
        machine = 0x23522a0
        __PRETTY_FUNCTION__ = "int main(int, char**)"