<html>
    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Crash in nouveau_dri.so when switching apps with alt-tab in Gnome"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99396">99396</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Crash in nouveau_dri.so when switching apps with alt-tab in Gnome
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Drivers/DRI/nouveau
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>nouveau@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>afn2@cornell.edu
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>nouveau@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Originally filed as a bug against Gnome
(<a href="https://bugzilla.gnome.org/show_bug.cgi?id=777183">https://bugzilla.gnome.org/show_bug.cgi?id=777183</a>) but they directed me here.

Intermittently, gnome-shell will crash with SIGSEGV when switching apps with
alt-tab. See stack trace below.

Generally when this occurs, I'm running Firefox and Chromium, each with several
windows open, and gnome-terminal. I'm not certain, but it seems to only happen
when I mouse over the app switcher.

I'm running gnome-shell 3.22.2+18+gdf7727a-1 on Arch.

Please let me know what other information I can gather! I'll update the bug if
I can come up with a reproducible way to trigger the crash.

Jan 12 12:37:20 mbp systemd-coredump[8769]: Process 8422 (gnome-shell) of user
1000 dumped core.

                                            Stack trace of thread 8422:
                                            #0  0x00007f63b1771793
__memmove_avx_unaligned_erms (libc.so.6)
                                            #1  0x00007f639e0baf40 n/a
(nouveau_dri.so)
                                            #2  0x00007f639e1cb008 n/a
(nouveau_dri.so)
                                            #3  0x00007f639e1c0355 n/a
(nouveau_dri.so)
                                            #4  0x00007f639e1c0537 n/a
(nouveau_dri.so)
                                            #5  0x00007f639e1cc3c4 n/a
(nouveau_dri.so)
                                            #6  0x00007f639df1b922 n/a
(nouveau_dri.so)
                                            #7  0x00007f639ddc6690 n/a
(nouveau_dri.so)
                                            #8  0x00007f639dd763b7 n/a
(nouveau_dri.so)
                                            #9  0x00007f639dd7bab5 n/a
(nouveau_dri.so)
                                            #10 0x00007f639dd7c900 n/a
(nouveau_dri.so)
                                            #11 0x00007f639dd005e7 n/a
(nouveau_dri.so)
                                            #12 0x00007f639dd013e0 n/a
(nouveau_dri.so)
                                            #13 0x00007f63af0e44ed n/a
(libmutter-cogl.so)
                                            #14 0x00007f63af0d5b14 n/a
(libmutter-cogl.so)
                                            #15 0x00007f63af10ae56
cogl_texture_allocate (libmutter-cogl.so)
                                            #16 0x00007f63af12640b n/a
(libmutter-cogl.so)
                                            #17 0x00007f63af126909
cogl_texture_new_from_bitmap (libmutter-cogl.so)
                                            #18 0x00007f63b277e143 n/a
(libmutter-clutter-1.0.so)
                                            #19 0x00007f63b275a85d
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #20 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #21 0x00007f63b463daa0 n/a
(libgnome-shell.so)
                                            #22 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #23 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #24 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #25 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #26 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #27 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #28 0x00007f63b4647f90 n/a
(libgnome-shell.so)
                                            #29 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #30 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #31 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #32 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #33 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #34 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #35 0x00007f63b4656182 n/a
(libgnome-shell.so)
                                            #36 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #37 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #37 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #38 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #39 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #40 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #41 0x00007f63b2760706 n/a
(libmutter-clutter-1.0.so)
                                            #42 0x00007f63b463daa0 n/a
(libgnome-shell.so)
                                            #43 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #44 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #45 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #46 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #47 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #48 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #49 0x00007f63b463daa0 n/a
(libgnome-shell.so)
                                            #50 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #51 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #52 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #53 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #54 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #55 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #56 0x00007f63b463daa0 n/a
(libgnome-shell.so)
                                            #57 0x00007f63b1f26ecf
g_closure_invoke (libgobject-2.0.so.0)
                                            #58 0x00007f63b1f3937d n/a
(libgobject-2.0.so.0)
                                            #59 0x00007f63b1f41bcc
g_signal_emit_valist (libgobject-2.0.so.0)
                                            #60 0x00007f63b1f41faf
g_signal_emit (libgobject-2.0.so.0)
                                            #61 0x00007f63b275a8a3
clutter_actor_continue_paint (libmutter-clutter-1.0.so)
                                            #62 0x00007f63b2760aab n/a
(libmutter-clutter-1.0.so)
                                            #63 0x00007f63b27b347a n/a
(libmutter-clutter-1.0.so)

                                            Stack trace of thread 8432:
                                            #0  0x00007f63b172848d poll
(libc.so.6)
                                            #1  0x00007f63ada92ee1 n/a
(libpulse.so.0)
                                            #2  0x00007f63ada846f1
pa_mainloop_poll (libpulse.so.0)
                                            #3  0x00007f63ada84d8e
pa_mainloop_iterate (libpulse.so.0)
                                            #4  0x00007f63ada84e40
pa_mainloop_run (libpulse.so.0)
                                            #5  0x00007f63ada92e29 n/a
(libpulse.so.0)
                                            #6  0x00007f63a31fcfe8 n/a
(libpulsecommon-9.99.so)
                                            #7  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #8  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8434:
                                            #0  0x00007f63b19f410f
pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                            #1  0x00007f63a492d4e0
PR_WaitCondVar (libnspr4.so)
                                            #2  0x00007f63ad55cbab n/a
(libmozjs-24.so)
                                            #3  0x00007f63a4932d6c n/a
(libnspr4.so)
                                            #4  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #5  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8424:
                                            #0  0x00007f63b172848d poll
(libc.so.6)
                                            #1  0x00007f63b1c4e786 n/a
(libglib-2.0.so.0)
                                            #2  0x00007f63b1c4e89c
g_main_context_iteration (libglib-2.0.so.0)
                                            #3  0x00007f63b1c4e8e1 n/a
(libglib-2.0.so.0)
                                            #4  0x00007f63b1c760d5 n/a
(libglib-2.0.so.0)
                                            #5  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #6  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8433:
                                            #0  0x00007f63b19f410f
pthread_cond_wait@@GLIBC_2.3.2 (libpthread.so.0)
                                            #1  0x00007f63a492d4e0
PR_WaitCondVar (libnspr4.so)
                                            #2  0x00007f63ad4e8c0e n/a
(libmozjs-24.so)
                                            #3  0x00007f63a4932d6c n/a
(libnspr4.so)
                                            #4  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #5  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8767:
                                            #0  0x00007f63b172cf19 syscall
(libc.so.6)
                                            #1  0x00007f63b1c9403a
g_cond_wait_until (libglib-2.0.so.0)
                                            #2  0x00007f63b1c22e89 n/a
(libglib-2.0.so.0)
                                            #3  0x00007f63b1c76aa6 n/a
(libglib-2.0.so.0)
                                            #4  0x00007f63b1c760d5 n/a
(libglib-2.0.so.0)
                                            #5  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #6  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8429:
                                            #0  0x00007f63b172848d poll
(libc.so.6)
                                            #1  0x00007f63b1c4e786 n/a
(libglib-2.0.so.0)
                                            #2  0x00007f63b1c4e89c
g_main_context_iteration (libglib-2.0.so.0)
                                            #3  0x00007f639c2404bd n/a
(libdconfsettings.so)
                                            #4  0x00007f63b1c760d5 n/a
(libglib-2.0.so.0)
                                            #5  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #6  0x00007f63b17317df __clone
(libc.so.6)

                                            Stack trace of thread 8425:
                                            #0  0x00007f63b172848d poll
(libc.so.6)
                                            #1  0x00007f63b1c4e786 n/a
(libglib-2.0.so.0)
                                            #2  0x00007f63b1c4eb12
g_main_loop_run (libglib-2.0.so.0)
                                            #3  0x00007f63b2234316 n/a
(libgio-2.0.so.0)
                                            #4  0x00007f63b1c760d5 n/a
(libglib-2.0.so.0)
                                            #5  0x00007f63b19ee454 start_thread
(libpthread.so.0)
                                            #6  0x00007f63b17317df __clone
(libc.so.6)</pre>
        </div>
      </p>


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