I get the following backtrace everytime I try to perform a scroll operation. I got it from a semi-debug build (minimal symbols but asserts on): ASSERTION FAILED: m_event.get() ../../Source/WebCore/dom/EventDispatcher.cpp(67) : WebCore::EventDispatcher::EventDispatcher(WebCore::Node*, WTF::PassRefPtr<WebCore::Event>) 1 0x7f0da1e517b7 /home/sergio/checkout/WebKit/WebKitBuild/Debug/.libs/libwebkitgtk-3.0.so.0(+0xa197b7) [0x7f0da1e517b7] 2 0x7f0da1e5166c /home/sergio/checkout/WebKit/WebKitBuild/Debug/.libs/libwebkitgtk-3.0.so.0(+0xa1966c) [0x7f0da1e5166c] 3 0x7f0da1e8b5d0 /home/sergio/checkout/WebKit/WebKitBuild/Debug/.libs/libwebkitgtk-3.0.so.0(+0xa535d0) [0x7f0da1e8b5d0] 4 0x7f0da23c240b /home/sergio/checkout/WebKit/WebKitBuild/Debug/.libs/libwebkitgtk-3.0.so.0(+0xf8a40b) [0x7f0da23c240b] 5 0x7f0da1a66adb /home/sergio/checkout/WebKit/WebKitBuild/Debug/.libs/libwebkitgtk-3.0.so.0(+0x62eadb) [0x7f0da1a66adb] 6 0x7f0d9f62e0a0 /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(+0x21a0a0) [0x7f0d9f62e0a0] 7 0x7f0d9c7983c2 /home/sergio/opt/gnome3/lib64/libgobject-2.0.so.0(+0x123c2) [0x7f0d9c7983c2] 8 0x7f0d9c797f85 /home/sergio/opt/gnome3/lib64/libgobject-2.0.so.0(+0x11f85) [0x7f0d9c797f85] 9 0x7f0d9c7b3e41 /home/sergio/opt/gnome3/lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x54b) [0x7f0d9c7b3e41] 10 0x7f0d9c7b4ff5 /home/sergio/opt/gnome3/lib64/libgobject-2.0.so.0(g_signal_emit+0xa6) [0x7f0d9c7b4ff5] 11 0x7f0d9f7da7ed /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(+0x3c67ed) [0x7f0d9f7da7ed] 12 0x7f0d9f7d9e3d /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(gtk_widget_event+0x112) [0x7f0d9f7d9e3d] 13 0x7f0d9f62d9e7 /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(+0x2199e7) [0x7f0d9f62d9e7] 14 0x7f0d9f62dd57 /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(+0x219d57) [0x7f0d9f62dd57] 15 0x7f0d9f62de25 /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(gtk_propagate_event+0xcc) [0x7f0d9f62de25] 16 0x7f0d9f62c5eb /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(gtk_main_do_event+0x41a) [0x7f0d9f62c5eb] 17 0x7f0d9f19aa86 /home/sergio/opt/gnome3/lib64/libgdk-3.so.0(+0x27a86) [0x7f0d9f19aa86] 18 0x7f0d9f1d3658 /home/sergio/opt/gnome3/lib64/libgdk-3.so.0(+0x60658) [0x7f0d9f1d3658] 19 0x7f0d9c086df5 /home/sergio/opt/gnome3/lib64/libglib-2.0.so.0(+0x55df5) [0x7f0d9c086df5] 20 0x7f0d9c087b5a /home/sergio/opt/gnome3/lib64/libglib-2.0.so.0(g_main_context_dispatch+0x33) [0x7f0d9c087b5a] 21 0x7f0d9c087d4a /home/sergio/opt/gnome3/lib64/libglib-2.0.so.0(+0x56d4a) [0x7f0d9c087d4a] 22 0x7f0d9c08817a /home/sergio/opt/gnome3/lib64/libglib-2.0.so.0(g_main_loop_run+0x1d8) [0x7f0d9c08817a] 23 0x7f0d9f62bdb8 /home/sergio/opt/gnome3/lib64/libgtk-3.so.0(gtk_main+0x6e) [0x7f0d9f62bdb8] 24 0x405c61 Programs/GtkLauncher(main+0x2eb) [0x405c61] 25 0x7f0d9b881a55 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f0d9b881a55] 26 0x4039b9 Programs/GtkLauncher() [0x4039b9] patch soon...
Created attachment 188921 [details] Patch
Comment on attachment 188921 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=188921&action=review > Source/WebCore/dom/Node.cpp:2403 > + if (!static_cast<EventDispatchMediator*>(wheelEventDispatchMediator.get())->event()) Can't we just check this in WheelEventDispatchMediator?
The patch which caused crash was rolled out. https://bugs.webkit.org/show_bug.cgi?id=110143 So we need to merge this issue into the original bug 109898.
*** This bug has been marked as a duplicate of bug 109898 ***
Comment on attachment 188921 [details] Patch Pulling out of review queue as the dupe bug is marked fixed.
Mass move bugs into the DOM component.