Description of problem:
gnome-shell just crashed.  I was not doing *anything* at the time (had just finished editing some files in gedit a few moments before.) Something in the background must have called a library... The crash did not go through the abrt tool but since I was running the gnome-shell via

gnome-shell --replace 

in Bash, the exception message was output there.


Here it is:

(mutter:2763): Clutter-WARNING **: The actor 'StBoxLayout' is currently inside an allocation cycle; calling clutter_actor_queue_relayout() is not recommended
*** glibc detected *** mutter: invalid fastbin entry (free): 0x0edd5c38 ***
======= Backtrace: =========
/lib/libc.so.6(+0x70ed1)[0x6dbed1]
/usr/lib/xulrunner-1.9.2/libmozjs.so[0x387cfca]
/usr/lib/xulrunner-1.9.2/libmozjs.so[0x38ffe10]
/lib/libnspr4.so[0x3d85ff2]
/lib/libpthread.so.0(+0x6b59)[0x1d6b59]
/lib/libc.so.6(clone+0x5e)[0x74ce8e]
======= Memory map: ========
00110000-001c3000 r-xp 00000000 fd:00 100133     /usr/lib/libgdk-x11-2.0.so.0.2000.0.#prelink#.ypaiFh (deleted)
001c3000-001c6000 rw-p 000b2000 fd:00 100133     /usr/lib/libgdk-x11-2.0.so.0.2000.0.#prelink#.ypaiFh (deleted)
001c6000-001cf000 r-xp 00000000 fd:00 100126     /usr/lib/libXcursor.so.1.0.2 (deleted)
001cf000-001d0000 rw-p 00008000 fd:00 100126     /usr/lib/libXcursor.so.1.0.2 (deleted)
001d0000-001e8000 r-xp 00000000 fd:00 16335      /lib/libpthread-2.11.90.so (deleted)
001e8000-001e9000 r--p 00017000 fd:00 16335      /lib/libpthread-2.11.90.so (deleted)
001e9000-001ea000 rw-p 00018000 fd:00 16335      /lib/libpthread-2.11.90.so (deleted)
001ea000-001ec000 rw-p 00000000 00:00 0 
001ec000-001ef000 r-xp 00000000 fd:00 98246      /lib/libdl-2.11.90.so (deleted)
001ef000-001f0000 r--p 00002000 fd:00 98246      /lib/libdl-2.11.90.so (deleted)
001f0000-001f1000 rw-p 00003000 fd:00 98246      /lib/libdl-2.11.90.so (deleted)
001f1000-001f5000 r-xp 00000000 fd:00 98958      /lib/libuuid.so.1.3.0 (deleted)
001f5000-001f6000 rw-p 00003000 fd:00 98958      /lib/libuuid.so.1.3.0 (deleted)
001f6000-001f7000 r-xp 00000000 fd:00 1573033    /usr/lib/gjs-1.0/gi.so
001f7000-001f8000 rw-p 00000000 fd:00 1573033    /usr/lib/gjs-1.0/gi.so
001f8000-0023f000 r-xp 00000000 fd:00 100116     /usr/lib/libpango-1.0.so.0.2800.0.#prelink#.PydkTS (deleted)
0023f000-00241000 rw-p 00047000 fd:00 100116     /usr/lib/libpango-1.0.so.0.2800.0.#prelink#.PydkTS (deleted)
00241000-00269000 r-xp 00000000 fd:00 98247      /lib/libm-2.11.90.so (deleted)
00269000-0026a000 r--p 00027000 fd:00 98247      /lib/libm-2.11.90.so (deleted)
0026a000-0026b000 rw-p 00028000 fd:00 98247      /lib/libm-2.11.90.so (deleted)
0026b000-00280000 r-xp 00000000 fd:00 98252      /lib/libresolv-2.11.90.so (deleted)
00280000-00281000 r--p 00014000 fd:00 98252      /lib/libresolv-2.11.90.so (deleted)
00281000-00282000 rw-p 00015000 fd:00 98252      /lib/libresolv-2.11.90.so (deleted)
00282000-00284000 rw-p 00000000 00:00 0 
00284000-002a0000 r-xp 00000000 fd:00 100130     /lib/libselinux.so.1 (deleted)
002a0000-002a1000 r--p 0001b000 fd:00 100130     /lib/libselinux.so.1 (deleted)
002a1000-002a2000 rw-p 0001c000 fd:00 100130     /lib/libselinux.so.1 (deleted)
002a2000-002a4000 r-xp 00000000 fd:00 29374      /usr/lib/gtk-2.0/modules/libpk-gtk-module.so
002a4000-002a5000 rw-p 00002000 fd:00 29374      /usr/lib/gtk-2.0/modules/libpk-gtk-module.so
002a5000-002a9000 r-xp 00000000 fd:00 19932      /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
002a9000-002aa000 rw-p 00004000 fd:00 19932      /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
002aa000-002ac000 r-xp 00000000 fd:00 44025      /lib/libutil-2.11.90.so (deleted)
002ac000-002ad000 r--p 00001000 fd:00 44025      /lib/libutil-2.11.90.so (deleted)
002ad000-002ae000 rw-p 00002000 fd:00 44025      /lib/libutil-2.11.90.so (deleted)
002ae000-002cc000 r-xp 00000000 fd:00 100132     /usr/lib/libgdk_pixbuf-2.0.so.0.2000.0.#prelink#.mEmjwg (deleted)
002cc000-002cd000 rw-p 0001d000 fd:00 100132     /usr/lib/libgdk_pixbuf-2.0.so.0.2000.0.#prelink#.mEmjwg (deleted)
002cd000-002ce000 r-xp 00000000 fd:00 1573034    /usr/lib/gjs-1.0/langNative.so
002ce000-002cf000 rw-p 00000000 fd:00 1573034    /usr/lib/gjs-1.0/langNative.so
002cf000-002da000 r-xp 00000000 fd:00 100119     /usr/lib/libpangocairo-1.0.so.0.2800.0.#prelink#.jlg1C4 (deleted)
002da000-002db000 rw-p 0000a000 fd:00 100119     /usr/lib/libpangocairo-1.0.so.0.2800.0.#prelink#.jlg1C4 (deleted)
002db000-002dc000 r-xp 00000000 fd:00 23482      /usr/lib/gtk-2.0/2.10.0/loaders/svg_loader.so
002dc000-002dd000 rw-p 00001000 fd:00 23482      /usr/lib/gtk-2.0/2.10.0/loaders/svg_loader.so
002dd000-00306000 r-xp 00000000 fd:00 100118     /usr/lib/libpangoft2-1.0.so.0.2800.0.#prelink#.Wy9pKY (deleted)
00306000-00307000 rw-p 00028000 fd:00 100118     /usr/lib/libpangoft2-1.0.so.0.2800.0.#prelink#.Wy9pKY (deleted)
00309000-00326000 r-xp 00000000 fd:00 100134     /usr/lib/libatk-1.0.so.0.3009.1 (deleted)
00326000-00328000 rw-p 0001d000 fd:00 100134     /usr/lib/libatk-1.0.so.0.3009.1 (deleted)
00328000-003a6000 r-xp 00000000 fd:00 100090     /usr/lib/libcairo.so.2.10800.10 (deleted)
003a6000-003a8000 rw-p 0007e000 fd:00 100090     /usr/lib/libcairo.so.2.10800.10 (deleted)
003a8000-003b2000 r-xp 00000000 fd:00 21308      /usr/lib/libdrm_intel.so.1.0.0
003b2000-003b3000 rw-p 00009000 fd:00 21308      /usr/lib/libdrm_intel.so.1.0.0
003b3000-003c2000 r-xp 00000000 fd:00 1573030    /usr/lib/gjs-1.0/dbusNative.so
003c2000-003c3000 rw-p 0000e000 fd:00 1573030    /usr/lib/gjs-1.0/dbusNative.so
003c4000-003c5000 r-xp 00000000 00:00 0          [vdso]
003c5000-0040a000 r-xp 00000000 fd:00 100138     /lib/libdbus-1.so.3.4.0 (deleted)
0040a000-0040b000 r--p 00044000 fd:00 100138     /lib/libdbus-1.so.3.4.0 (deleted)
0040b000-0040c000 rw-p 00045000 fd:00 100138     /lib/libdbus-1.so.3.4.0 (deleted)
0040c000-00429000 r-xp 00000000 fd:00 100077     /usr/lib/libxcb.so.1.1.0 (deleted)
00429000-0042a000 rw-p 0001c000 fd:00 100077     /usr/lib/libxcb.so.1.1.0 (deleted)
0042a000-00490000 r-xp 00000000 fd:00 10909      /usr/lib/libpixman-1.so.0.18.0 (deleted)
00490000-00493000 rw-p 00066000 fd:00 10909      /usr/lib/libpixman-1.so.0.18.0 (deleted)
00493000-004be000 r-xp 00000000 fd:00 48915      /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
004be000-004bf000 rw-p 0002b000 fd:00 48915      /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
004bf000-004d9000 r-xp 00000000 fd:00 62108      /usr/lib/libgjs-gi.so.0.0.0
004d9000-004da000 rw-p 00019000 fd:00 62108      /usr/lib/libgjs-gi.so.0.0.0
004da000-004dc000 r-xp 00000000 fd:00 1573035    /usr/lib/gjs-1.0/mainloop.so
004dc000-004dd000 rw-p 00001000 fd:00 1573035    /usr/lib/gjs-1.0/mainloop.so
004dd000-004e4000 r-xp 00000000 fd:00 100161     /usr/lib/libSM.so.6.0.0 (deleted)
004e4000-004e5000 rw-p 00006000 fd:00 100161     /usr/lib/libSM.so.6.0.0 (deleted)
004e7000-004fe000 r-xp 00000000 fd:00 16256      /usr/lib/libICE.so.6.3.0 (deleted)
004fe000-00500000 rw-p 00016000 fd:00 16256      /usr/lib/libICE.so.6.3.0 (deleted)
00500000-00501000 rw-p 00000000 00:00 0 Shell killed with signal 6




Version-Release number of selected component (if applicable):
2.29.1-4

How reproducible:
Never seen it before.

  
Actual results:
Killed gnome-shell and went back to the old panel.

Expected results:


Additional info: