Hi Jim,
Currrently, gnome-shell core dumps on latest aarch64 build.
The issue appears to be the same as reported here
https://bugzilla.redhat.com/show_bug.cgi?id=1429050
RHELSA 7.4 does not have the issue and it looks like RHEL has a more up-to-date version of llvmpipe
mesa-private-llvm-3.9.1-3.p1.el7a.aarch64.rpm
while CentOS version is
mesa-private-llvm-3.9.1-3.el7.aarch64.rpm
Please see if you can release an RPM update for this.
Thanks,
-Phong