[Webkit-unassigned] [Bug 255761] Crash in WebCore::BackgroundPainter::calculateBackgroundImageGeometry

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255761

--- Comment #3 from Michael Catanzaro <mcatanzaro at redhat.com> ---
This naive patch avoids the crash (but I doubt it's the correct solution):

diff --git a/Source/WebCore/rendering/RenderLayerBacking.cpp b/Source/WebCore/rendering/RenderLayerBacking.cpp
index d182f008bfdd..3628348a4d60 100644
--- a/Source/WebCore/rendering/RenderLayerBacking.cpp
+++ b/Source/WebCore/rendering/RenderLayerBacking.cpp
@@ -2730,6 +2730,9 @@ void RenderLayerBacking::updateDirectlyCompositedBackgroundImage(PaintedContents
         return;
     }

+    if (!renderBox())
+        return;
+
     auto backgroundBox = LayoutRect { backgroundBoxForSimpleContainerPainting() };
     // FIXME: Absolute paint location is required here.
     auto geometry = BackgroundPainter::calculateBackgroundImageGeometry(*renderBox(), renderBox(), style.backgroundLayers(), { }, backgroundBox);

> FYI Cocoa platforms don’t use updateDirectlyCompositedBackgroundImage().

Uh, OK, let's move to WebKitGTK component then.

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