LibWeb: Print FIXME instead of crashing if fill is url() in svg text

Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/SerenityOS/serenity/commit/cf47e130ae
Pull-request: https://github.com/SerenityOS/serenity/pull/19993
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/Painting/SVGTextPaintable.cpp

@@ -34,6 +34,11 @@ void SVGTextPaintable::paint(PaintContext& context, PaintPhase phase) const
     if (!layout_node().computed_values().fill().has_value())
         return;
 
+    if (layout_node().computed_values().fill()->is_url()) {
+        dbgln("FIXME: Using url() as fill is not supported for svg text");
+        return;
+    }
+
     SVGGraphicsPaintable::paint(context, phase);
 
     if (phase != PaintPhase::Foreground)