WebGL tech preview plugin always crashes in QFontEngineQPF2 on macOS

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: EXC_I386_GPFLT
Exception Note: EXC_CORPSE_NOTIFY

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 org.qt-project.QtGui 0x000000010527ba6d QFontEngineQPF2::QFontEngineQPF2(QFontDef const&, QByteArray const&) + 45
1 org.qt-project.QtGui 0x000000010527ea9b QPlatformFontDatabase::fontEngine(QFontDef const&, void*) + 43
2 org.qt-project.QtGui 0x00000001051f2467 loadEngine(int, QFontDef const&, QtFontFamily*, QtFontFoundry*, QtFontStyle*, QtFontSize*) + 1623
3 org.qt-project.QtGui 0x00000001051f0d5a QFontDatabase::findFont(QFontDef const&, int) + 730
4 org.qt-project.QtGui 0x00000001051f37b6 QFontDatabase::load(QFontPrivate const*, int) + 2518
5 org.qt-project.QtGui 0x00000001051c9a06 QFontPrivate::engineForScript(int) const + 390
6 org.qt-project.QtGui 0x00000001051f9053 QTextEngine::fontEngine(QScriptItem const&, QFixed*, QFixed*, QFixed*) const + 867
7 org.qt-project.QtGui 0x00000001051f7d51 QTextEngine::shapeText(int) const + 673
8 org.qt-project.QtGui 0x000000010520f3b1 QTextLine::layout_helper(int) + 801
9 org.qt-project.QtQuick 0x000000010440ff6b QQuickTextPrivate::setLineGeometry(QTextLine&, double, double&) + 43
10 org.qt-project.QtQuick 0x000000010440d4a2 QQuickTextPrivate::setupTextLayout(double*) + 2562
11 org.qt-project.QtQuick 0x000000010440a2ec QQuickTextPrivate::updateSize() + 396
12 org.qt-project.QtQuick 0x000000010440c462 QQuickTextPrivate::updateLayout() + 1522
13 org.qt-project.QtQuick 0x0000000104413ff5 QQuickText::componentComplete() + 389
14 org.qt-project.QtQml 0x00000001048e1519 QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) + 665
15 org.qt-project.QtQml 0x0000000104859c09 QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) + 73
16 org.qt-project.QtQml 0x0000000104857889 QQmlComponentPrivate::completeCreate() + 41
17 org.qt-project.QtQml 0x00000001048592f2 QQmlComponent::create(QQmlContext*) + 114
18 org.qt-project.QtQuick 0x000000010446af54 QQuickView::continueExecute() + 628
19 org.qt-project.QtQuick 0x000000010446acc3 QQuickViewPrivate::execute() + 643
20 org.qt-project.shadereffects 0x000000010429d639 main + 1129 (main.cpp:51)
21 libdyld.dylib 0x00007fff9673f235 start + 1