Version-Release number of selected component:
webkit2gtk3-2.24.1-1.fc29

Additional info:
reporter:       libreport-2.10.0
backtrace_rating: 4
cmdline:        /usr/libexec/webkit2gtk-4.0/WebKitWebProcess 9 22
crash_function: WTF::TypeCastTraits<WebCore::FrameView const, WebCore::Widget const, false>::isType
executable:     /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
journald_cursor: s=c689b23696a2430abfea7b8ec5ee85a2;i=2d81;b=bb51a982ba9344c685fd62864910d2a0;m=b60fb41c;t=586feeccbf6fb;x=fc96498379ac4452
kernel:         5.0.7-200.fc29.x86_64
rootdir:        /
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WTF::TypeCastTraits<WebCore::FrameView const, WebCore::Widget const, false>::isType at ../Source/WebCore/page/FrameView.h:958
 #1 WTF::TypeCastTraits<WebCore::FrameView const, WebCore::Widget const, false>::isOfType at ../Source/WebCore/page/FrameView.h:958
 #2 WTF::is<WebCore::FrameView, WebCore::Widget> at DerivedSources/ForwardingHeaders/wtf/TypeCasts.h:58
 #3 WebCore::FrameView::removeChild at ../Source/WebCore/page/FrameView.cpp:4959
 #4 WebCore::ScrollView::setHasScrollbarInternal at DerivedSources/ForwardingHeaders/wtf/DumbPtrTraits.h:41
 #5 WebCore::ScrollView::setHasHorizontalScrollbar at ../Source/WebCore/platform/ScrollView.cpp:68
 #6 WebCore::ScrollView::updateScrollbars at ../Source/WebCore/platform/ScrollView.cpp:650
 #7 WebCore::ScrollView::setScrollbarModes at ../Source/WebCore/platform/graphics/IntRect.h:84
 #9 WebCore::FrameView::adjustScrollbarsForLayout at ../Source/WebCore/page/FrameView.cpp:1226
 #10 WebCore::FrameView::willDoLayout at ../Source/WebCore/page/FrameView.cpp:1245