[Webkit-unassigned] [Bug 184037] New: [WPE] Floating point exception in WebEventFactory::createWebWheelEvent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=184037

            Bug ID: 184037
           Summary: [WPE] Floating point exception in
                    WebEventFactory::createWebWheelEvent
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit WPE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cadubentzen at gmail.com
                CC: bugs-noreply at webkitgtk.org

Environment:
- WebKit trunk r229973
- Gnome Wayland
- Arch Linux
- MacBook Pro Retina mid 2015

Steps to reproduce:
- Run dyz and scroll using MacBook's touchpad (with usb mouse it doesn't crash)

Backtrace:
Program terminated with signal SIGFPE, Arithmetic exception.
#0  WebKit::WebEventFactory::createWebWheelEvent (event=0x7ffc2a854f40, deviceScaleFactor=1) at ../../Source/WebKit/Shared/wpe/WebEventFactory.cpp:156
156             wheelTicks = WebCore::FloatSize(event->value / std::abs(event->value), 0);
[Current thread is 1 (Thread 0x7f854eedee80 (LWP 21448))]
(gdb) bt
#0  WebKit::WebEventFactory::createWebWheelEvent (event=0x7ffc2a854f40, deviceScaleFactor=1) at ../../Source/WebKit/Shared/wpe/WebEventFactory.cpp:156
#1  0x00007f8544aaeb06 in WebKit::NativeWebWheelEvent::NativeWebWheelEvent (this=0x7ffc2a854e60, event=0x7ffc2a854f40, deviceScaleFactor=1)
    at ../../Source/WebKit/Shared/wpe/NativeWebWheelEventWPE.cpp:36
#2  0x00007f8544b7197e in WKWPE::View::<lambda(void*, wpe_input_axis_event*)>::operator()(void *, wpe_input_axis_event *) const (__closure=0x0, data=0x7f852e5dd000, event=0x7ffc2a854f40)
    at ../../Source/WebKit/UIProcess/API/wpe/WPEView.cpp:119
#3  0x00007f8544b719cd in WKWPE::View::<lambda(void*, wpe_input_axis_event*)>::_FUN(void *, wpe_input_axis_event *) () at ../../Source/WebKit/UIProcess/API/wpe/WPEView.cpp:116
#4  0x00007f853a724c0c in wpe_view_backend_dispatch_axis_event () from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libWPEBackend.so.0
#5  0x00007f852cedae8b in Wayland::{lambda(void*, wl_pointer*, unsigned int, unsigned int, int)#12}::operator()(void*, wl_pointer*, unsigned int, unsigned int, int) const ()
   from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libWPEBackend-default.so
#6  0x00007f852cedaee0 in Wayland::{lambda(void*, wl_pointer*, unsigned int, unsigned int, int)#12}::_FUN(void*, wl_pointer*, unsigned int, unsigned int, int) ()
   from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libWPEBackend-default.so
#7  0x00007f854d35827a in ffi_call_unix64 () from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libffi.so.5
#8  0x00007f854d3571d6 in ffi_call (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>)
    at /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Source/libffi-3.0.10/src/x86/ffi64.c:486
#9  0x00007f8530c0cbad in ?? () from /usr/lib/libwayland-client.so.0
#10 0x00007f8530c09679 in ?? () from /usr/lib/libwayland-client.so.0
#11 0x00007f8530c0a9b4 in wl_display_dispatch_queue_pending () from /usr/lib/libwayland-client.so.0
#12 0x00007f852ceda396 in Wayland::EventSource::{lambda(_GSource*, int (*)(void*), void*)#3}::operator()(_GSource*, int (*)(void*), void*) const ()
   from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libWPEBackend-default.so
#13 0x00007f852ceda3ed in Wayland::EventSource::{lambda(_GSource*, int (*)(void*), void*)#3}::_FUN(_GSource*, int (*)(void*), void*) ()
   from /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Root/lib/libWPEBackend-default.so
#14 0x00007f854da36b27 in g_main_dispatch (context=0x55d483567f90) at /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Source/glib-2.54.3/glib/gmain.c:3142
#15 g_main_context_dispatch (context=context at entry=0x55d483567f90) at /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Source/glib-2.54.3/glib/gmain.c:3795
#16 0x00007f854da36d60 in g_main_context_iterate (context=0x55d483567f90, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>)
    at /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Source/glib-2.54.3/glib/gmain.c:3868
#17 0x00007f854da37072 in g_main_loop_run (loop=0x55d483569190) at /home/cadubentzen/git/github/webkit/WebKitBuild/DependenciesWPE/Source/glib-2.54.3/glib/gmain.c:4064
#18 0x00007f854ea7e49b in ?? () from /usr/lib/libluajit-5.1.so.2
#19 0x00007f854eab5db7 in ?? () from /usr/lib/libluajit-5.1.so.2
#20 0x00007f854eab64b0 in ?? () from /usr/lib/libluajit-5.1.so.2
#21 0x00007f854ea7c316 in ?? () from /usr/lib/libluajit-5.1.so.2
#22 0x00007f854eac1e7c in ?? () from /usr/lib/libluajit-5.1.so.2
#23 0x00007f854ea7c316 in ?? () from /usr/lib/libluajit-5.1.so.2
#24 0x00007f854eac1e7c in ?? () from /usr/lib/libluajit-5.1.so.2
#25 0x00007f854ea7c316 in ?? () from /usr/lib/libluajit-5.1.so.2
#26 0x00007f854eac1fe0 in lua_pcall () from /usr/lib/libluajit-5.1.so.2
#27 0x000055d482c60b14 in main ()

It turns out event->value is 0 sometimes.

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