When clicking on an entry of search results in Qt Assistant it can crash if it is the first time the page is shown

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.qt-project.QtGui          	0x000000010848c142 QTextLine::height() const + 18
1   org.qt-project.QtGui          	0x00000001084cd07e QTextDocumentLayoutPrivate::layoutFlow(QTextFrame::iterator, QTextLayoutStruct*, int, int, QFixed) + 7710
2   org.qt-project.QtGui          	0x00000001084d2b56 QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed, QFixed, QFixed) + 2070
3   org.qt-project.QtGui          	0x00000001084d2318 QTextDocumentLayoutPrivate::layoutFrame(QTextFrame*, int, int, QFixed) + 984
4   org.qt-project.QtGui          	0x00000001084d5239 QTextDocumentLayout::doLayout(int, int, int) + 521
5   org.qt-project.QtGui          	0x00000001084d4d67 QTextDocumentLayout::documentChanged(int, int, int) + 807
6   org.qt-project.QtGui          	0x00000001084af2bc QTextDocumentPrivate::finishEdit() + 188
7   org.qt-project.assistant      	0x0000000107c8674d 0x107c4a000 + 247629
8   org.qt-project.assistant      	0x0000000107c5eef5 0x107c4a000 + 85749
9   org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
10  org.qt-project.assistant      	0x0000000107c8a6c0 0x107c4a000 + 263872
11  org.qt-project.assistant      	0x0000000107c864c8 0x107c4a000 + 246984
12  org.qt-project.assistant      	0x0000000107c5e90c 0x107c4a000 + 84236
13  org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
14  org.qt-project.assistant      	0x0000000107c8b810 0x107c4a000 + 268304
15  org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
16  org.qt-project.QtHelp         	0x0000000107d9dbf6 QHelpSearchResultWidget::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 118
17  org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
18  org.qt-project.QtHelp         	0x0000000107d92ba7 QResultWidget::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 151
19  org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
20  org.qt-project.QtWidgets      	0x0000000107f7a252 QTextBrowserPrivate::_q_activateAnchor(QString const&) + 434
21  org.qt-project.QtCore         	0x0000000108aa3be1 QMetaObject::activate(QObject*, int, int, void**) + 913
22  org.qt-project.QtWidgets      	0x0000000107fc3c09 QWidgetTextControlPrivate::activateLinkUnderCursor(QString) + 1321
23  org.qt-project.QtWidgets      	0x0000000107fc226a QWidgetTextControlPrivate::mouseReleaseEvent(QEvent*, Qt::MouseButton, QPointF const&, QFlags<Qt::KeyboardModifier>, QFlags<Qt::MouseButton>, QPoint const&) + 730
24  org.qt-project.QtWidgets      	0x0000000107fc0670 QWidgetTextControl::processEvent(QEvent*, QMatrix const&, QWidget*) + 2656
25  org.qt-project.QtWidgets      	0x0000000107fbfc00 QWidgetTextControl::processEvent(QEvent*, QPointF const&, QWidget*) + 80
26  org.qt-project.QtWidgets      	0x0000000107f762a7 QTextEdit::mouseReleaseEvent(QMouseEvent*) + 151
27  org.qt-project.QtWidgets      	0x0000000107e0e8c6 QWidget::event(QEvent*) + 1670
28  org.qt-project.QtWidgets      	0x0000000107f03f7d QFrame::event(QEvent*) + 45
29  org.qt-project.QtWidgets      	0x0000000107f8c573 QAbstractScrollArea::viewportEvent(QEvent*) + 179
30  org.qt-project.QtWidgets      	0x0000000107f8d125 QAbstractScrollAreaFilter::eventFilter(QObject*, QEvent*) + 37
31  org.qt-project.QtCore         	0x0000000108a735aa QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) + 202
32  org.qt-project.QtWidgets      	0x0000000107dd4578 QApplicationPrivate::notify_helper(QObject*, QEvent*) + 248
33  org.qt-project.QtWidgets      	0x0000000107dd7b23 QApplication::notify(QObject*, QEvent*) + 9123
34  org.qt-project.QtCore         	0x0000000108a73314 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 164
35  org.qt-project.QtWidgets      	0x0000000107dd4eb7 QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) + 871
36  org.qt-project.QtWidgets      	0x0000000107e2f1cb QWidgetWindow::handleMouseEvent(QMouseEvent*) + 1387
37  org.qt-project.QtWidgets      	0x0000000107e2e20f QWidgetWindow::event(QEvent*) + 175
38  org.qt-project.QtWidgets      	0x0000000107dd458d QApplicationPrivate::notify_helper(QObject*, QEvent*) + 269
39  org.qt-project.QtWidgets      	0x0000000107dd6e5c QApplication::notify(QObject*, QEvent*) + 5852
40  org.qt-project.QtCore         	0x0000000108a73314 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 164
41  org.qt-project.QtGui          	0x00000001083b1b77 QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) + 2855
42  org.qt-project.QtGui          	0x000000010839938b QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 155
43  libqcocoa.dylib               	0x000000010bae0e81 QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void*) + 33
44  com.apple.CoreFoundation      	0x00007fff793fe8d1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
45  com.apple.CoreFoundation      	0x00007fff793dfc6c __CFRunLoopDoSources0 + 556
46  com.apple.CoreFoundation      	0x00007fff793df156 __CFRunLoopRun + 934
47  com.apple.CoreFoundation      	0x00007fff793deb54 CFRunLoopRunSpecific + 420
48  com.apple.HIToolbox           	0x00007fff78969a5c RunCurrentEventLoopInMode + 240
49  com.apple.HIToolbox           	0x00007fff78969799 ReceiveNextEventCommon + 184
50  com.apple.HIToolbox           	0x00007fff789696c6 _BlockUntilNextEventMatchingListInModeWithFilter + 71
51  com.apple.AppKit              	0x00007fff76f0f5b4 _DPSNextEvent + 1120
52  com.apple.AppKit              	0x00007fff77689d6b -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2789
53  com.apple.AppKit              	0x00007fff76f03f35 -[NSApplication run] + 926
54  libqcocoa.dylib               	0x000000010badfd1f QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 2143
55  org.qt-project.QtCore         	0x0000000108a6f0e1 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 401
56  org.qt-project.QtCore         	0x0000000108a73985 QCoreApplication::exec() + 341
57  org.qt-project.assistant      	0x0000000107c68cee 0x107c4a000 + 126190
58  libdyld.dylib                 	0x00007fff8e9d1255 start + 1