[Wayland-bugs] [Bug 108038] Xwayland crashes constantly (xorg-server-1.20.1 tag of xserver)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108038

            Bug ID: 108038
           Summary: Xwayland crashes constantly (xorg-server-1.20.1 tag of
                    xserver)
           Product: Wayland
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: XWayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: serega.belarus at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 141708
  --> https://bugs.freedesktop.org/attachment.cgi?id=141708&action=edit
xwayland core dump from coredumpctl, can be used inside gdb

archlinux distro, gnome as desktop environment, gdm as desktop manager.

Rollback to xorg-server-1.20.0 fixes the issue.


There's core file attached.

Coredump info:

```plain
           PID: 771 (Xwayland)
           UID: 1000 (nartes)
           GID: 1000 (nartes)
        Signal: 6 (ABRT)
     Timestamp: Sun 2018-09-23 17:04:52 +03 (56min ago)
  Command Line: /usr/bin/Xwayland :0 -rootless -terminate -accessx -core
-listen 4 -listen 5 -displayfd 6
    Executable: /usr/bin/Xwayland
 Control Group: /user.slice/user-1000.slice/session-2.scope
          Unit: session-2.scope
         Slice: user-1000.slice
       Session: 2
     Owner UID: 1000 (nartes)
       Boot ID: 4ad1bc740df242c2b7e786fccd484039
    Machine ID: ec8ac8cf4cb14010ac2f461877ef63ac
      Hostname: siarhei_hp
       Storage:
/var/lib/systemd/coredump/core.Xwayland.1000.4ad1bc740df242c2b7e786fccd484039.771.1537711492000000.lz4
       Message: Process 771 (Xwayland) of user 1000 dumped core.

                Stack trace of thread 771:
                #0  0x00007f168a998d7f raise (libc.so.6)
                #1  0x00007f168a983672 abort (libc.so.6)
                #2  0x0000562ff139e05a n/a (Xwayland)
                #3  0x0000562ff1396425 n/a (Xwayland)
                #4  0x0000562ff14bd3ec n/a (Xwayland)
                #5  0x00007f168a273e8a n/a (libwayland-client.so.0)
                #6  0x00007f168a26f1f9 n/a (libwayland-client.so.0)
                #7  0x00007f1688d781c8 ffi_call_unix64 (libffi.so.6)
                #8  0x00007f1688d77c2a ffi_call (libffi.so.6)
                #9  0x00007f168a272f5f n/a (libwayland-client.so.0)
                #10 0x00007f168a26f6ca n/a (libwayland-client.so.0)
                #11 0x00007f168a270bdf wl_display_dispatch_queue_pending
(libwayland-client.so.0)
                #12 0x0000562ff14bebdb n/a (Xwayland)
                #13 0x0000562ff139fdd1 n/a (Xwayland)
                #14 0x0000562ff1467ad0 n/a (Xwayland)
                #15 0x0000562ff136210d n/a (Xwayland)
                #16 0x00007f168a985223 __libc_start_main (libc.so.6)
                #17 0x0000562ff136313e n/a (Xwayland)

                Stack trace of thread 781:
                #0  0x00007f1689672afc pthread_cond_wait@@GLIBC_2.3.2
(libpthread.so.0)
                #1  0x00007f168655bf3c n/a (i965_dri.so)
                #2  0x00007f168655bc78 n/a (i965_dri.so)
                #3  0x00007f168966ca9d start_thread (libpthread.so.0)
                #4  0x00007f168aa5ca43 __clone (libc.so.6)

                Stack trace of thread 783:
                #0  0x00007f1689672afc pthread_cond_wait@@GLIBC_2.3.2
(libpthread.so.0)
                #1  0x00007f1684936054 n/a (swrast_dri.so)
                #2  0x00007f1684935f98 n/a (swrast_dri.so)
                #3  0x00007f168966ca9d start_thread (libpthread.so.0)
                #4  0x00007f168aa5ca43 __clone (libc.so.6)

                Stack trace of thread 782:
                #0  0x00007f1689672afc pthread_cond_wait@@GLIBC_2.3.2
(libpthread.so.0)
                #1  0x00007f1684936054 n/a (swrast_dri.so)
                #2  0x00007f1684935f98 n/a (swrast_dri.so)
                #3  0x00007f168966ca9d start_thread (libpthread.so.0)
                #4  0x00007f168aa5ca43 __clone (libc.so.6)

           PID: 789 (Xwayland)
           UID: 1000 (nartes)
           GID: 1000 (nartes)

```

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