[Wayland-bugs] [Bug 774187] New: touchscreen event under wayland causes any GTK3 app to crash

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774187

            Bug ID: 774187
           Summary: touchscreen event under wayland causes any GTK3 app to
                    crash
    Classification: Platform
           Product: gtk+
           Version: 3.22.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Backend: Wayland
          Assignee: gtk-bugs at gtk.org
          Reporter: p.panayiotou at gmail.com
        QA Contact: gtk-bugs at gtk.org
                CC: rob at robster.org.uk, wayland-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 339440
  --> https://bugzilla.gnome.org/attachment.cgi?id=339440&action=edit
core dump

Hello Gnome developers, and thank you for your excellent work that has given us
an amazing desktop.

This is an annoying bug that causes any GTK3 application to crash when using
the touchscreen. Unless I'm mistaken, it hasn't been reported yet.

Steps to reproduce:

1. Start any GTK3 application, for instance:
$ gnome-calculator

2. Tap on the clock in the top panel, to open the calendar drop-down.

3. Now tap on the application's window.

4. The application crashes.

This is 100% reproducible on my machine. I'm running Arch Linux with Gnome 3.22
on a Dell Inspiron 15-7568.

Backtrace:

(gdb) bt
#0  0x00007ffff6d6948d in  () at /usr/lib/libgdk-3.so.0
#1  0x00007ffff10a01c8 in ffi_call_unix64 () at /usr/lib/libffi.so.6
#2  0x00007ffff109fc2a in ffi_call () at /usr/lib/libffi.so.6
#3  0x00007ffff1f4708e in  () at /usr/lib/libwayland-client.so.0
#4  0x00007ffff1f43d20 in  () at /usr/lib/libwayland-client.so.0
#5  0x00007ffff1f44f74 in wl_display_dispatch_queue_pending () at
/usr/lib/libwayland-client.so.0
#6  0x00007ffff6d6f7e4 in  () at /usr/lib/libgdk-3.so.0
#7  0x00007ffff6d0f169 in gdk_display_get_event () at /usr/lib/libgdk-3.so.0
#8  0x00007ffff6d6f4d2 in  () at /usr/lib/libgdk-3.so.0
#9  0x00007ffff5fbc587 in g_main_context_dispatch () at
/usr/lib/libglib-2.0.so.0
#10 0x00007ffff5fbc7f0 in  () at /usr/lib/libglib-2.0.so.0
#11 0x00007ffff5fbc89c in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#12 0x00007ffff657654d in g_application_run () at /usr/lib/libgio-2.0.so.0
#13 0x000000000040c1c5 in calculator_main ()
#14 0x00007ffff59d7291 in __libc_start_main () at /usr/lib/libc.so.6
#15 0x000000000040af1a in _start ()

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