QtWebEngine 5.11 Web Inspector SEGV_MAPERR

Thread 1 (Thread 0x7ffff7f99780 (LWP 25765)):
#0  0x00007fffeede660b in QtWebEngineCore::DevToolsFrontendQt::DevToolsFrontendQt (this=0x5555598d2fb0, webContentsAdapter=..., 
    inspectedContents=0x555559a449d0)
    at qtwebengine-5.11.9999/src/core/devtools_frontend_qt.cpp:187
#1  0x00007fffeede6bd6 in QtWebEngineCore::DevToolsFrontendQt::Show (frontendAdapter=..., inspectedContents=0x555559a449d0)
    at qtwebengine-5.11.9999/src/core/devtools_frontend_qt.cpp:162
#2  0x00007fffeee2c82b in QtWebEngineCore::WebContentsAdapter::openDevToolsFrontend (this=<optimized out>, frontendAdapter=...)
    at qtwebengine-5.11.9999/src/core/web_contents_adapter.cpp:1180
#3  0x00007ffff5f5b2a0 in QWebEnginePage::setDevToolsPage (this=this@entry=0x7fffd4005a50, 
    devToolsPage=devToolsPage@entry=0x55555995f7a0)
    at qtwebengine-5.11.9999/src/webenginewidgets/api/qwebenginepage.cpp:2081
#4  0x00007ffff5f5b525 in QWebEnginePage::setInspectedPage (this=this@entry=0x55555995f7a0, page=0x7fffd4005a50)
    at qtwebengine-5.11.9999/src/webenginewidgets/api/qwebenginepage.cpp:2035
#5  0x00007ffff7a94871 in WebInspector::setView (this=this@entry=0x7fffd400add0, view=<optimized out>)
    at falkon-9999/src/lib/webengine/webinspector.cpp:71
#6  0x00007ffff7aab089 in WebTab::showWebInspector (this=0x5555599e8890, inspectElement=inspectElement@entry=true)
    at falkon-9999/src/lib/webtab/webtab.cpp:225
#7  0x00007ffff7aaa287 in TabbedWebView::inspectElement (this=0x55555957b880)
    at falkon-9999/src/lib/webtab/tabbedwebview.cpp:73
#8  0x00007ffff7ab77ba in TabbedWebView::qt_static_metacall (_o=0x55555957b880, _c=<optimized out>, _id=<optimized out>, 
    _a=<optimized out>) at src/lib/FalkonPrivate_autogen/2FW6LYN3XI/moc_tabbedwebview.cpp:122