I can confirm this bug:
$ Xephyr :1 &
$ DISPLAY=:1 gnome-shell -vg
Starting shell
Waiting for shell to exit
GNU gdb (GDB) 7.2-debian
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/mutter...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/mutter --mutter-plugins=libgnome-shell
[Thread debugging using libthread_db enabled]
Xlib: extension "NV-GLX" missing on display ":1".
[New Thread 0x7fffebbf3700 (LWP 8962)]
Window manager warning: Failed to load theme "Adwaita": Failed to find a
valid file for theme Adwaita
[New Thread 0x7fffe1919700 (LWP 8963)]
Window manager warning: Log level 16: Accessibility: org.a11y.atspi schema
not found. Are you sure that at-spi or at-spi2 is installed on your system?
Window manager warning: Log level 16: Accessibility: invalid module path
(NULL)
Window manager warning: Log level 16: Accessibility: error loading the
atk-bridge. Although the accessibility on the system is enabled and clutter
accessibility is also enabled, accessibility support on GNOME Shell will not
work
JS NATIVE: Registered native JS module 'byteArray'
[New Thread 0x7fffe0ac5700 (LWP 8964)]
JS CTX: Enabling JIT
JS CTX: Changing JavaScript version to 1.8 from default
Program received signal SIGSEGV, Segmentation fault.
0x00007fffe57b87e4 in JSCompartment::JSCompartment(JSRuntime*) () from
/usr/lib/libmozjs.so.4d
(gdb) bt
#0 0x00007fffe57b87e4 in JSCompartment::JSCompartment(JSRuntime*) () from
/usr/lib/libmozjs.so.4d
#1 0x00007fffe57ffa3b in ?? () from /usr/lib/libmozjs.so.4d
#2 0x00007fffe5795bb1 in JS_NewCompartmentAndGlobalObject () from
/usr/lib/libmozjs.so.4d
#3 0x00007fffeaf3d9d2 in gjs_init_context_standard () from
/usr/lib/libgjs.so.0
#4 0x00007fffeaf3ad8e in ?? () from /usr/lib/libgjs.so.0
#5 0x00007ffff3c1e751 in g_object_newv () from /usr/lib/libgobject-2.0.so.0
#6 0x00007ffff3c1f1cd in g_object_new_valist () from
/usr/lib/libgobject-2.0.so.0
#7 0x00007ffff3c1f4e1 in g_object_new () from /usr/lib/libgobject-2.0.so.0
#8 0x00007fffeb1785e4 in ?? () from
/usr/lib/mutter/plugins/libgnome-shell.so
#9 0x000000000042a63e in meta_plugin_manager_initialize ()
#10 0x0000000000427df0 in meta_compositor_manage_screen ()
#11 0x000000000043c383 in meta_display_open ()
#12 0x0000000000446915 in main ()
(gdb) quit
A debugging session is active.
Inferior 1 [process 8959] will be killed.
Quit anyway? (y or n) y
1 XSELINUXs still allocated at reset
SCREEN: 0 objects of 152 bytes = 0 total bytes 0 private allocs
DEVICE: 0 objects of 32 bytes = 0 total bytes 0 private allocs
CLIENT: 0 objects of 200 bytes = 0 total bytes 0 private allocs
WINDOW: 0 objects of 56 bytes = 0 total bytes 0 private allocs
PIXMAP: 1 objects of 16 bytes = 16 total bytes 0 private allocs
GC: 0 objects of 56 bytes = 0 total bytes 0 private allocs
CURSOR: 0 objects of 8 bytes = 0 total bytes 0 private allocs
CURSOR_BITS: 0 objects of 8 bytes = 0 total bytes 0 private allocs
DBE_WINDOW: 0 objects of 24 bytes = 0 total bytes 0 private allocs
TOTAL: 1 objects, 16 bytes, 0 allocs
1 PIXMAPs still allocated at reset
PIXMAP: 1 objects of 16 bytes = 16 total bytes 0 private allocs
GC: 0 objects of 56 bytes = 0 total bytes 0 private allocs
CURSOR: 0 objects of 8 bytes = 0 total bytes 0 private allocs
CURSOR_BITS: 0 objects of 8 bytes = 0 total bytes 0 private allocs
DBE_WINDOW: 0 objects of 24 bytes = 0 total bytes 0 private allocs
TOTAL: 1 objects, 16 bytes, 0 allocs
1 DAMAGEs still allocated at reset
TOTAL: 0 objects, 0 bytes, 0 allocs
[dix] Could not init font path element /usr/share/fonts/X11/cyrillic,
removing from list!
Shell exited normally
