gnome-shell crashed with signal 5 in g_malloc0()

[hackel]

Apparently random crash. I wasn't using the machine at the time, it was sitting idle, but unlocked, open to gnome-shell and several apps when suddenly gnome-shell crashed (window decoration disappeared). No idea what triggered it.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-15.16-generic 4.13.4
Uname: Linux 4.13.0-15-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Fri Oct 13 15:59:28 2017
DisplayManager: gdm3
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2014-08-03 (1166 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
ProcCmdline: gnome-shell --replace
Signal: 5
SourcePackage: gnome-shell
StacktraceTop:
 g_malloc0 () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
 () at /usr/lib/gnome-shell/libst-1.0.so
 _st_create_shadow_pipeline () at /usr/lib/gnome-shell/libst-1.0.so
 _st_create_shadow_pipeline_from_actor () at /usr/lib/gnome-shell/libst-1.0.so
 () at /usr/lib/gnome-shell/libst-1.0.so
Title: gnome-shell crashed with signal 5 in g_malloc0()
UpgradeStatus: Upgraded to artful on 2017-09-29 (14 days ago)
UserGroups: adm cdrom dip docker kvm libvirtd lpadmin lxd plugdev sambashare sudo video www-data

[Apport retracing service (apport)]

StacktraceTop:
 g_malloc0 (n_bytes=18446744072098939136) at ../../../../glib/gmem.c:129
 blur_pixels (pixels_in=pixels_in@entry=0x561127083c00 "", width_in=width_in@entry=16, height_in=height_in@entry=16, rowstride_in=rowstride_in@entry=16, blur=<optimized out>, width_out=width_out@entry=0x7ffdf067d9a4, height_out=height_out@entry=0x7ffdf067d9a8, rowstride_out=0x7ffdf067d9ac) at ../src/st/st-private.c:280
 _st_create_shadow_pipeline (shadow_spec=shadow_spec@entry=0x5611291794d0, src_texture=src_texture@entry=0x5611214803d0) at ../src/st/st-private.c:372
 _st_create_shadow_pipeline_from_actor (shadow_spec=0x5611291794d0, actor=0x5611287a1900) at ../src/st/st-private.c:434
 st_icon_update_shadow_pipeline (icon=icon@entry=0x56112725aca0) at ../src/st/st-icon.c:278